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Dr. NOORFAIZAL YIDRIS
Department of Aerospace Engineering, Faculty of Engineering, University Putra Malaysia, 43400 UPM Serdang-Selangor Darul Ehsan-Malaysia.

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0 Buckling
0 Finite Element Analysis (FEA)
0 Thin-Walled Structures
0 Finite Element Modelling (FEM)
0 Post Buckling

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Review
Published: 02 May 2021 in Micromachines
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In terms of their flight and unusual aerodynamic characteristics, mosquitoes have become a new insect of interest. Despite transmitting the most significant infectious diseases globally, mosquitoes are still among the great flyers. Depending on their size, they typically beat at a high flapping frequency in the range of 600 to 800 Hz. Flapping also lets them conceal their presence, flirt, and help them remain aloft. Their long, slender wings navigate between the most anterior and posterior wing positions through a stroke amplitude about 40 to 45°, way different from their natural counterparts (>120°). Most insects use leading-edge vortex for lift, but mosquitoes have additional aerodynamic characteristics: rotational drag, wake capture reinforcement of the trailing-edge vortex, and added mass effect. A comprehensive look at the use of these three mechanisms needs to be undertaken—the pros and cons of high-frequency, low-stroke angles, operating far beyond the normal kinematic boundary compared to other insects, and the impact on the design improvements of miniature drones and for flight in low-density atmospheres such as Mars. This paper systematically reviews these unique unsteady aerodynamic characteristics of mosquito flight, responding to the potential questions from some of these discoveries as per the existing literature. This paper also reviews state-of-the-art insect-inspired robots that are close in design to mosquitoes. The findings suggest that mosquito-based small robots can be an excellent choice for flight in a low-density environment such as Mars.

ACS Style

Balbir Singh; Noorfaizal Yidris; Adi Basri; Raghuvir Pai; Kamarul Ahmad. Study of Mosquito Aerodynamics for Imitation as a Small Robot and Flight in a Low-Density Environment. Micromachines 2021, 12, 511 .

AMA Style

Balbir Singh, Noorfaizal Yidris, Adi Basri, Raghuvir Pai, Kamarul Ahmad. Study of Mosquito Aerodynamics for Imitation as a Small Robot and Flight in a Low-Density Environment. Micromachines. 2021; 12 (5):511.

Chicago/Turabian Style

Balbir Singh; Noorfaizal Yidris; Adi Basri; Raghuvir Pai; Kamarul Ahmad. 2021. "Study of Mosquito Aerodynamics for Imitation as a Small Robot and Flight in a Low-Density Environment." Micromachines 12, no. 5: 511.

Review
Published: 20 April 2021 in Polymers
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Nowadays, pultruded glass fiber-reinforced polymer composite (PGFRPC) structures have been used widely for cross-arms in high transmission towers. These composite structures have replaced cross-arms of conventional materials like wood due to several factors, such as better strength, superior resistance to environmental degradation, reduced weight, and comparatively cheaper maintenance. However, lately, several performance failures have been found on existing cross-arm members, caused by moisture, temperature changes in the atmosphere, and other environmental factors, which may lead to a complete failure or reduced service life. As a potential solution for this problem, enhancing PGFRPC with honeycomb-filled composite structures will become a possible alternative that can sustain a longer service life compared to that of existing cross-arms. This is due to the new composite structures’ superior performance under mechanical duress in providing better stiffness, excellence in flexural characteristics, good energy absorption, and increased load-carrying capacity. Although there has been a lack of previous research done on the enhancement of existing composite cross-arms in applications for high transmission towers, several studies on the enhancement of hollow beams and tubes have been done. This paper provides a state-of-the-art review study on the mechanical efficiency of both PGFRPC structures and honeycomb-filled composite sandwich structures in experimental and analytical terms.

ACS Style

Abd Amir; Mohamad Ishak; Noorfaizal Yidris; Mohamed Zuhri; Muhammad Asyraf. Potential of Honeycomb-Filled Composite Structure in Composite Cross-Arm Component: A Review on Recent Progress and Its Mechanical Properties. Polymers 2021, 13, 1341 .

AMA Style

Abd Amir, Mohamad Ishak, Noorfaizal Yidris, Mohamed Zuhri, Muhammad Asyraf. Potential of Honeycomb-Filled Composite Structure in Composite Cross-Arm Component: A Review on Recent Progress and Its Mechanical Properties. Polymers. 2021; 13 (8):1341.

Chicago/Turabian Style

Abd Amir; Mohamad Ishak; Noorfaizal Yidris; Mohamed Zuhri; Muhammad Asyraf. 2021. "Potential of Honeycomb-Filled Composite Structure in Composite Cross-Arm Component: A Review on Recent Progress and Its Mechanical Properties." Polymers 13, no. 8: 1341.

Research article
Published: 10 March 2021 in International Journal of Polymer Science
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This research is aimed at developing the sandwich structure with a hybrid composite facesheet and investigate its mechanical properties (tensile, edgewise compression, and flexural). The combination of renewable and synthetic materials appears to reduce the weight, cost, and environmental impact compared to pure synthetic materials. The hybrid composite facesheets were fabricated with different ratios and stacking sequence of flax and glass fibers. The nonhybrid flax and glass composite facesheet sandwich structures were fabricated for comparison. The overall mechanical performance of the sandwich structures was improved by increasing the glass fiber ratio in the hybrid composites. The experimental tensile properties of the hybrid facesheet and the edgewise compression strength and ultimate flexural facing stress of the hybrid composites sandwich structures were achieved higher when the results were normalized to the same fiber volume fraction of glass composite. The hybrid composite sandwich structure showed improved compression and flexural facing stress up to 68% and 75%, respectively, compared to nonhybrid flax composites. The hybrid composite using glass in the outer layer achieved the similar flexural stiffness of the nonhybrid glass composite with only a 6% higher thickness than the glass composite sandwich structure.

ACS Style

W. Ashraf; M. R. Ishak; M. Y. M. Zuhri; N. Yidris; A. M. Ya’Acob. Experimental Investigation on the Mechanical Properties of a Sandwich Structure Made of Flax/Glass Hybrid Composite Facesheet and Honeycomb Core. International Journal of Polymer Science 2021, 2021, 1 -10.

AMA Style

W. Ashraf, M. R. Ishak, M. Y. M. Zuhri, N. Yidris, A. M. Ya’Acob. Experimental Investigation on the Mechanical Properties of a Sandwich Structure Made of Flax/Glass Hybrid Composite Facesheet and Honeycomb Core. International Journal of Polymer Science. 2021; 2021 ():1-10.

Chicago/Turabian Style

W. Ashraf; M. R. Ishak; M. Y. M. Zuhri; N. Yidris; A. M. Ya’Acob. 2021. "Experimental Investigation on the Mechanical Properties of a Sandwich Structure Made of Flax/Glass Hybrid Composite Facesheet and Honeycomb Core." International Journal of Polymer Science 2021, no. : 1-10.

Journal article
Published: 26 February 2021 in Applied Sciences
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Previously, numerous creep studies on wood materials have been conducted in various coupon-scale tests. None had conducted research on creep properties of full-scale wooden cross-arms under actual environment and working load conditions. Hence, this research established findings on effect of braced arms on the creep behaviors of Virgin Balau (Shorea dipterocarpaceae) wood timber cross-arm in 132 kV latticed tower. In this research, creep properties of the main members of both current and braced wooden cross-arm designs were evaluated under actual working load conditions at 1000 h. The wooden cross-arm was assembled on a custom-made creep test rig at an outdoor area to simulate its long-term mechanical behaviours under actual environment of tropical climate conditions. Further creep numerical analyses were also performed by using Findley and Burger models in order to elaborate the transient creep, elastic and viscoelastic moduli of both wooden cross-arm configurations. The findings display that the reinforcement of braced arms in cross-arm structure significantly reduced its creep strain. The inclusion of bracing system in cross-arm structure enhanced transient creep and stress independent material exponent of the wooden structure. The addition of braced arms also improved elastic and viscoelastic moduli of wooden cross-arm structure. Thus, the outcomes suggested that the installation of bracing system in wooden cross-arm could extend the structure’s service life. Subsequently, this effort would ease maintenance and reduce cost for long-term applications in transmission towers.

ACS Style

Muhammad Asyraf; Mohamad Ishak; Salit Sapuan; Noorfaizal Yidris. Influence of Additional Bracing Arms as Reinforcement Members in Wooden Timber Cross-Arms on Their Long-Term Creep Responses and Properties. Applied Sciences 2021, 11, 2061 .

AMA Style

Muhammad Asyraf, Mohamad Ishak, Salit Sapuan, Noorfaizal Yidris. Influence of Additional Bracing Arms as Reinforcement Members in Wooden Timber Cross-Arms on Their Long-Term Creep Responses and Properties. Applied Sciences. 2021; 11 (5):2061.

Chicago/Turabian Style

Muhammad Asyraf; Mohamad Ishak; Salit Sapuan; Noorfaizal Yidris. 2021. "Influence of Additional Bracing Arms as Reinforcement Members in Wooden Timber Cross-Arms on Their Long-Term Creep Responses and Properties." Applied Sciences 11, no. 5: 2061.

Journal article
Published: 19 February 2021 in Polymers
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The application of pultruded glass fiber-reinforced polymer composites (PGFRPCs) as a replacement for conventional wooden cross-arms in transmission towers is relatively new. Although numerous studies have conducted creep tests on coupon-scale PGFRPC cross-arms, none had performed creep analyses on full-scale PGFRPC cross-arms under actual working load conditions. Thus, this work proposed to study the influence of an additional bracing system on the creep responses of PGFRPC cross-arms in a 132 kV transmission tower. The creep behaviors and responses of the main members in current and braced PGFRPC cross-arm designs were compared and evaluated in a transmission tower under actual working conditions. These PGFRPC cross-arms were subjected to actual working loads mimicking the actual weight of electrical cables and insulators for a duration of 1000 h. The cross-arms were installed on a custom test rig in an open area to simulate the actual environment of tropical climate conditions. Further creep analysis was performed by using Findley and Burger models on the basis of experimental data to link instantaneous and extended (transient and viscoelastic) creep strains. The addition of braced arms to the structure reduced the total strain of a cross-arm’s main member beams and improved elastic and viscous moduli. The addition of bracing arms improved the structural integrity and stiffness of the cross-arm structure. The findings of this study suggested that the use of a bracing system in cross-arm structures could prolong the structures’ service life and subsequently reduce maintenance effort and cost for long-term applications in transmission towers.

ACS Style

Muhammad Asyraf; Mohamad Ishak; Salit Sapuan; Noorfaizal Yidris. Utilization of Bracing Arms as Additional Reinforcement in Pultruded Glass Fiber-Reinforced Polymer Composite Cross-Arms: Creep Experimental and Numerical Analyses. Polymers 2021, 13, 620 .

AMA Style

Muhammad Asyraf, Mohamad Ishak, Salit Sapuan, Noorfaizal Yidris. Utilization of Bracing Arms as Additional Reinforcement in Pultruded Glass Fiber-Reinforced Polymer Composite Cross-Arms: Creep Experimental and Numerical Analyses. Polymers. 2021; 13 (4):620.

Chicago/Turabian Style

Muhammad Asyraf; Mohamad Ishak; Salit Sapuan; Noorfaizal Yidris. 2021. "Utilization of Bracing Arms as Additional Reinforcement in Pultruded Glass Fiber-Reinforced Polymer Composite Cross-Arms: Creep Experimental and Numerical Analyses." Polymers 13, no. 4: 620.

Journal article
Published: 22 January 2021 in Polymers
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The stiffness response or load-deformation/displacement behavior is the most important mechanical behavior that frequently being utilized for validation of the mathematical-physical models representing the mechanical behavior of solid objects in numerical method, compared to actual experimental data. This numerical study aims to investigate the linear-nonlinear stiffness behavior of carbon fiber-reinforced polymer (CFRP) composites at material and structural levels, and its dependency to the sets of individual/group elastic and damage model parameters. In this regard, a validated constitutive damage model, elastic-damage properties as reference data, and simulation process, that account for elastic, yielding, and damage evolution, are considered in the finite element model development process. The linear-nonlinear stiffness responses of four cases are examined, including a unidirectional CFRP composite laminate (material level) under tensile load, and also three multidirectional composite structures under flexural loads. The result indicated a direct dependency of the stiffness response at the material level to the elastic properties. However, the stiffness behavior of the composite structures depends both on the structural configuration, geometry, lay-ups as well as the mechanical properties of the CFRP composite. The value of maximum reaction force and displacement of the composite structures, as well as the nonlinear response of the structures are highly dependent not only to the mechanical properties, but also to the geometry and the configuration of the structures.

ACS Style

S. R. Koloor; A. Karimzadeh; M. Abdullah; M. Petrů; N. Yidris; S. Sapuan; M. Tamin. Linear-Nonlinear Stiffness Responses of Carbon Fiber-Reinforced Polymer Composite Materials and Structures: A Numerical Study. Polymers 2021, 13, 344 .

AMA Style

S. R. Koloor, A. Karimzadeh, M. Abdullah, M. Petrů, N. Yidris, S. Sapuan, M. Tamin. Linear-Nonlinear Stiffness Responses of Carbon Fiber-Reinforced Polymer Composite Materials and Structures: A Numerical Study. Polymers. 2021; 13 (3):344.

Chicago/Turabian Style

S. R. Koloor; A. Karimzadeh; M. Abdullah; M. Petrů; N. Yidris; S. Sapuan; M. Tamin. 2021. "Linear-Nonlinear Stiffness Responses of Carbon Fiber-Reinforced Polymer Composite Materials and Structures: A Numerical Study." Polymers 13, no. 3: 344.

Review article
Published: 02 December 2020 in International Journal of Polymer Science
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Recently, advanced technologies exploit materials from nonrenewable resources such as petroleum, natural gas, metal ores, and minerals. Since the depletion of these resources and environmental issues, it has brought attention to researchers to progress in the development of biodegradable materials from green composites. Most biofibres and biopolymers are obtained from agricultural waste products either from stem, leaf, stalk, or fruit. Nowadays, green composites with well-regulated life span have been widely discussed in numerous fields and applications. Some studies have shown that biofibres and biopolymers have comparable mechanical, thermal, and physical properties with glass fibre and other synthetic polymers. Thus, researchers are progressively narrowing down the development of green composite materials in many high strength applications, such as house deck and automotive components. This review focuses on the background of green composites (natural fibres and biopolymers), the manufacturing processes, potential applications in cross arm structures, and testing evaluations. This article also focuses on the specific current cross arm configurations and the pultrusion process to form squared hollow section beams. Many open issues and ideas for potential applications of green composites are analysed, and further emphases are given on the development of environmentally friendly material structures. Hence, the article is expected to deliver a state-of-art review on manufacturability and perspectives of natural fibre reinforced biopolymer composite cross arms for transmission towers.

ACS Style

M. R. M. Asyraf; M. R. Ishak; S. M. Sapuan; N. Yidris; R. A. Ilyas; M. Rafidah; M. R. Razman. Potential Application of Green Composites for Cross Arm Component in Transmission Tower: A Brief Review. International Journal of Polymer Science 2020, 2020, 1 -15.

AMA Style

M. R. M. Asyraf, M. R. Ishak, S. M. Sapuan, N. Yidris, R. A. Ilyas, M. Rafidah, M. R. Razman. Potential Application of Green Composites for Cross Arm Component in Transmission Tower: A Brief Review. International Journal of Polymer Science. 2020; 2020 ():1-15.

Chicago/Turabian Style

M. R. M. Asyraf; M. R. Ishak; S. M. Sapuan; N. Yidris; R. A. Ilyas; M. Rafidah; M. R. Razman. 2020. "Potential Application of Green Composites for Cross Arm Component in Transmission Tower: A Brief Review." International Journal of Polymer Science 2020, no. : 1-15.

Journal article
Published: 26 November 2020 in Metals
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This paper presents the prediction of the fatigue life of aluminum Al 2024-T351 at room and elevated temperatures under uniaxial loading using finite element simulation. Structural parts such as fuselage, wings, aircraft turbines and heat exchangers are required to work safely at this working condition even with decreasing fatigue strength and other properties. The monotonic tensile and cyclic tests at 100 °C and 200 °C were conducted using MTS 810 servo hydraulic equipped with MTS 653 high temperature furnace at a frequency of 10 Hz and load ratio of 0.1. There was an 8% increase in the yield strength and a 2.32 MPa difference in the ultimate strength at 100 °C. However, the yield strength had a 1.61 MPa difference and 25% decrease in the ultimate strength at 200 °C compared to the room temperature. The mechanical and micro-structural behavior at elevated temperatures caused an increase in the crack initiation and crack propagation which reduced the total fatigue life. The yield strength, ultimate strength, alternating stress, mean stress and fatigue life were taken as the input in finite element commercial software, ANSYS. Comparison of results between experimental and finite element methods showed a good agreement. Hence, the suggested method using the numerical software can be used for predicting the fatigue life at elevated temperature.

ACS Style

Shahan Mazlan; Noorfaizal Yidris; Seyed Saeid Rahimian Koloor; Michal Petrů. Experimental and Numerical Analysis of Fatigue Life of Aluminum Al 2024-T351 at Elevated Temperature. Metals 2020, 10, 1581 .

AMA Style

Shahan Mazlan, Noorfaizal Yidris, Seyed Saeid Rahimian Koloor, Michal Petrů. Experimental and Numerical Analysis of Fatigue Life of Aluminum Al 2024-T351 at Elevated Temperature. Metals. 2020; 10 (12):1581.

Chicago/Turabian Style

Shahan Mazlan; Noorfaizal Yidris; Seyed Saeid Rahimian Koloor; Michal Petrů. 2020. "Experimental and Numerical Analysis of Fatigue Life of Aluminum Al 2024-T351 at Elevated Temperature." Metals 10, no. 12: 1581.

Journal article
Published: 26 November 2020 in Materials
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Stainless steels are increasingly used in construction today, especially in harsh environments, in which steel corrosion commonly occurs. Cold-formed stainless steel structures are currently increasing in popularity because of its efficiency in load-bearing capacity and its appealing architectural appearance. Cold-rolling and press-braking are the cold-working processes used in the forming of stainless steel sections. Press braking can produce large cross-sections from thin to thick-walled sections compared to cold-rolling. Cold-forming in press-braked sections significantly affect member behaviour and joints; therefore, they have attained great attention from many researchers to initiate investigations on those effects. This paper examines the behaviour of residual stress distribution of stainless steel press-braked sections by implementing three-dimensional finite element (3D-FE) technique. The study proposed a full finite element procedure to predict the residual stresses starting from coiling-uncoiling to press-braking. This work considered material anisotropy to examine its effect on the residual stress distribution. The technique adopted was compared with different finite element techniques in the literature. This study also provided a parametric study for three corner radius-to-thickness ratios looking at the through-thickness residual stress distribution of four stainless steels (i.e., ferritic, austenitic, duplex, lean duplex) in which have their own chemical composition. In conclusion, the comparison showed that the adopted technique provides a detailed prediction of residual stress distribution. The influence of geometrical aspects is more pronounced than the material properties. Neglecting the material anisotropy shows higher shifting in the neutral axis. The parametric study showed that all stainless steel types have the same stress through-thickness distribution. Moreover, R/t ratios’ effect is insignificant in all transverse residual stress distributions, but a slight change to R/t ratios can affect the longitudinal residual stress distribution.

ACS Style

Ayad Mutafi; Noorfaizal Yidris; Seyed Saeid Rahimian Koloor; Michal Petrů. Numerical Prediction of Residual Stresses Distribution in Thin-Walled Press-Braked Stainless Steel Sections. Materials 2020, 13, 5378 .

AMA Style

Ayad Mutafi, Noorfaizal Yidris, Seyed Saeid Rahimian Koloor, Michal Petrů. Numerical Prediction of Residual Stresses Distribution in Thin-Walled Press-Braked Stainless Steel Sections. Materials. 2020; 13 (23):5378.

Chicago/Turabian Style

Ayad Mutafi; Noorfaizal Yidris; Seyed Saeid Rahimian Koloor; Michal Petrů. 2020. "Numerical Prediction of Residual Stresses Distribution in Thin-Walled Press-Braked Stainless Steel Sections." Materials 13, no. 23: 5378.

Research article
Published: 27 April 2020 in Polymer Composites
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This manuscript explains the conceptual design of carbon fibre reinforced polymer composites portable fire extinguisher. In this project, the integration of theory of inventive problem solving (TRIZ), morphological chart and analytic network process (ANP) methods was applied to produce the concept designs. The current design of fire extinguisher possesses great difficulties to many users due to its weight and design. In this study, a new design was developed to replace the existing heavy and bulky fire extinguisher design. A preliminary steps were used in the design planning to construct a proper direction to create a new design product. Afterwards, the detailing of the engineering parameters was refined using the TRIZ contradiction matrix to provide inventive solutions for the product. The finalised inventive solution from TRIZ is later incorporated with the morphological chart along with ANP technique to systematically develop the final conceptual design of portable fire extinguisher. The results showed that Concept Design 1 scored the highest value and ranked first among the four designs proposed. Finally, challenges of the portable fire extinguisher design and the improving criteria in concurrent engineering were presented.

ACS Style

M. R. M. Asyraf; M. Rafidah; M. R. Ishak; S. M. Sapuan; N. Yidris; R. A. Ilyas; M. R. Razman. Integration of TRIZ , morphological chart and ANP method for development of FRP composite portable fire extinguisher. Polymer Composites 2020, 41, 2917 -2932.

AMA Style

M. R. M. Asyraf, M. Rafidah, M. R. Ishak, S. M. Sapuan, N. Yidris, R. A. Ilyas, M. R. Razman. Integration of TRIZ , morphological chart and ANP method for development of FRP composite portable fire extinguisher. Polymer Composites. 2020; 41 (7):2917-2932.

Chicago/Turabian Style

M. R. M. Asyraf; M. Rafidah; M. R. Ishak; S. M. Sapuan; N. Yidris; R. A. Ilyas; M. R. Razman. 2020. "Integration of TRIZ , morphological chart and ANP method for development of FRP composite portable fire extinguisher." Polymer Composites 41, no. 7: 2917-2932.

Journal article
Published: 21 March 2020 in Materials
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The compressive behaviour of column members can be considerably affected by local buckling, material yielding and local end conditions. In this paper, the effects of the loading conditions at the ends of plain channel section columns subjected to uniformly compressed loading, and fixed conditions at the column ends with respect to global rotations, was examined. Finite element simulation was employed to look at the post-buckled response of thin-walled, plain channel section columns that covered the complete loading history of the compression columns from the onset of elastic local buckling through the nonlinear elastic and elastoplastic post-buckling phases of behaviour to final collapse and unloading. Two types of loading conditions were considered: the first was one that has been used practically in tests whereby one end is loaded with a moving top platen while the other end is fixed at the lower platen, but, for the second loading condition, both ends were loaded with equally moving top and lower platens. These two conditions were shown to lead to quite different characteristic interactive responses of the columns due to mode jumping in the buckling mode for the locally rotationally constrained case.

ACS Style

Noorfaizal Yidris; Nur Hazwani Isham; Ezanee Gires; Ayad Mutafi. The Effects of Loading Conditions on the Behaviour of Fixed-Ended Plain Channel Columns. Materials 2020, 13, 1441 .

AMA Style

Noorfaizal Yidris, Nur Hazwani Isham, Ezanee Gires, Ayad Mutafi. The Effects of Loading Conditions on the Behaviour of Fixed-Ended Plain Channel Columns. Materials. 2020; 13 (6):1441.

Chicago/Turabian Style

Noorfaizal Yidris; Nur Hazwani Isham; Ezanee Gires; Ayad Mutafi. 2020. "The Effects of Loading Conditions on the Behaviour of Fixed-Ended Plain Channel Columns." Materials 13, no. 6: 1441.

Journal article
Published: 07 January 2020 in Polymers
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Composite structures are made of multidirectional (MD) fiber-reinforced polymer (FRP) composite laminates, which fail due to multiple damages in matrix, interface, and fiber constituents at different scales. The yield point of a unidirectional FRP composite is assumed as the lamina strength limit representing the damage initiation phenomena, while yielding of MD composites in structural applications are not quantified due to the complexity of the sequence of damage evolutions in different laminas dependent on their angle and specification. This paper proposes a new method to identify the yield point of MD composite structures based on the evolution of the damage dissipation energy (DDE). Such a characteristic evolution curve is computed using a validated finite element model with a mesoscale damage-based constitutive model that accounts for different matrix and fiber failure modes in angle lamina. The yield point of composite structures is identified to correspond to a 5% increase in the initial slope of the DDE evolution curve. The yield points of three antisymmetric MD FRP composite structures under flexural loading conditions are established based on Hashin unidirectional (UD) criteria and the energy-based criterion. It is shown that the new energy concept provides a significantly larger safe limit of yield for MD composite structures compared to UD criteria, in which the accumulation of energy dissipated due to all damage modes is less than 5% of the fracture energy required for the structural rupture.

ACS Style

Seyed Saeid Rahimian Koloor; Atefeh Karimzadeh; Noorfaizal Yidris; Michal Petrů; Majid Reza Ayatollahi; Mohd Nasir Tamin. An Energy-Based Concept for Yielding of Multidirectional FRP Composite Structures Using a Mesoscale Lamina Damage Model. Polymers 2020, 12, 157 .

AMA Style

Seyed Saeid Rahimian Koloor, Atefeh Karimzadeh, Noorfaizal Yidris, Michal Petrů, Majid Reza Ayatollahi, Mohd Nasir Tamin. An Energy-Based Concept for Yielding of Multidirectional FRP Composite Structures Using a Mesoscale Lamina Damage Model. Polymers. 2020; 12 (1):157.

Chicago/Turabian Style

Seyed Saeid Rahimian Koloor; Atefeh Karimzadeh; Noorfaizal Yidris; Michal Petrů; Majid Reza Ayatollahi; Mohd Nasir Tamin. 2020. "An Energy-Based Concept for Yielding of Multidirectional FRP Composite Structures Using a Mesoscale Lamina Damage Model." Polymers 12, no. 1: 157.

Journal article
Published: 05 January 2019 in Composite Structures
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Effect of fiber orientation on tensile and low cycle fatigue of intraply hybrid composites was investigated. In this work, intraply carbon/Kevlar fabric/epoxy hybrid composites were tested for static and cyclic loadings at 0°, 45 and 90° corresponding to carbon, off-axis and Kevlar fiber directions. Ambient fatigue tests were performed at stress levels established from static tests. Tensile results showed the best strength and modulus was in the carbon direction followed by Kevlar direction. At 45°, high ductility was observed associated to fiber rotation. Fatigue linear regression lines indicated a slower degradation rate in the Kevlar loading direction compared to the carbon loading direction. Large fatigue scatter in the Kevlar direction suggested two distinct phases of fatigue attributed to the stiffening of Kevlar fibers that further led to lower fatigue degradation. Investigation on residual strength of run-out samples and fracture modes were also presented with interesting findings.

ACS Style

Nurain Hashim; Dayang Laila Abdul Majid; El-Sadig Mahdi; Rizal Zahari; Noorfaizal Yidris. Effect of fiber loading directions on the low cycle fatigue of intraply carbon-Kevlar reinforced epoxy hybrid composites. Composite Structures 2019, 212, 476 -483.

AMA Style

Nurain Hashim, Dayang Laila Abdul Majid, El-Sadig Mahdi, Rizal Zahari, Noorfaizal Yidris. Effect of fiber loading directions on the low cycle fatigue of intraply carbon-Kevlar reinforced epoxy hybrid composites. Composite Structures. 2019; 212 ():476-483.

Chicago/Turabian Style

Nurain Hashim; Dayang Laila Abdul Majid; El-Sadig Mahdi; Rizal Zahari; Noorfaizal Yidris. 2019. "Effect of fiber loading directions on the low cycle fatigue of intraply carbon-Kevlar reinforced epoxy hybrid composites." Composite Structures 212, no. : 476-483.

Review
Published: 17 December 2018 in Sensors
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This paper aims to provide an overview of the experimental and simulation works focused on the detection, localisation and assessment of various defects in pipes by applying fast-screening guided ultrasonic wave techniques that have been used in the oil and gas industries over the past 20 years. Major emphasis is placed on limitations, capabilities, defect detection in coated buried pipes under pressure and corrosion monitoring using different commercial guided wave (GW) systems, approaches to simulation techniques such as the finite element method (FEM), wave mode selection, excitation and collection, GW attenuation, signal processing and different types of GW transducers. The effects of defect parameters on reflection coefficients are also discussed in terms of different simulation studies and experimental verifications.

ACS Style

Aidin Ghavamian; Faizal Mustapha; B.T Hang Tuah Baharudin; Noorfaizal Yidris. Detection, Localisation and Assessment of Defects in Pipes Using Guided Wave Techniques: A Review. Sensors 2018, 18, 4470 .

AMA Style

Aidin Ghavamian, Faizal Mustapha, B.T Hang Tuah Baharudin, Noorfaizal Yidris. Detection, Localisation and Assessment of Defects in Pipes Using Guided Wave Techniques: A Review. Sensors. 2018; 18 (12):4470.

Chicago/Turabian Style

Aidin Ghavamian; Faizal Mustapha; B.T Hang Tuah Baharudin; Noorfaizal Yidris. 2018. "Detection, Localisation and Assessment of Defects in Pipes Using Guided Wave Techniques: A Review." Sensors 18, no. 12: 4470.

Journal article
Published: 13 December 2018 in Thin-Walled Structures
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Cold formed steel sections are normally produced by cold work manufacturing processes. The amount of cold work to form the sections may induce residual stresses in the section, especially in the area of bending. Studies by previous researchers of the effects of local buckling on the failure mechanics of thin-walled compression members have shown that ultimate failure will occur when the yielding has reached most of the middle surface in the corner region of the sections. Hence, these cold work processes may have significant effects on the section behaviour and load-bearing capacity. Most of the studies have investigated the effect of residual stresses raised from roll-forming operation and its influence on steel section behaviour. However, press-braking has not received much attention. Therefore, a 3D finite element simulation has been employed to simulate this forming process. This study investigated the magnitude and distribution of residual stresses along the length of the corner region and through thickness residual stress variations induced by the press-braking forming process. The study concluded that residual stresses are not linear longitudinally (along the corner region). Maximum residual stresses exist near the middle surface of the plate. The neutral surface contains a combination of compressive and tensile residual stresses. The neutral axis is shifted from mid-surface by 7.5% of the plate thickness due to bending. The comparison of the 3D-FE results with the existence of 2D-FE results illustrates that the 3D-FE results show a variation in the transverse and longitudinal residual stresses along the plate length.

ACS Style

Ayad Mutafi; N. Yidris; J. Loughlan; R. Zahari; M.R. Ishak. Investigation into the distribution of residual stresses in pressed-braked thin-walled steel lipped channel sections using the 3D-FEM technique. Thin-Walled Structures 2018, 135, 437 -445.

AMA Style

Ayad Mutafi, N. Yidris, J. Loughlan, R. Zahari, M.R. Ishak. Investigation into the distribution of residual stresses in pressed-braked thin-walled steel lipped channel sections using the 3D-FEM technique. Thin-Walled Structures. 2018; 135 ():437-445.

Chicago/Turabian Style

Ayad Mutafi; N. Yidris; J. Loughlan; R. Zahari; M.R. Ishak. 2018. "Investigation into the distribution of residual stresses in pressed-braked thin-walled steel lipped channel sections using the 3D-FEM technique." Thin-Walled Structures 135, no. : 437-445.

Journal article
Published: 01 November 2018 in Heliyon
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Steel sections are normally shaped via cold work manufacturing processes. The extent of cold work to shape the steel sections might induce residual stresses in the region of bending. Previously, researchers had performed studies on the influences of local buckling on the failure behavior of steel compression members which shown that failure will happen when most of the yielding has extended to the middle surface in the bend region of the sections. Therefore, these cold work methods may have major effect on the behavior of the steel section and also its load-bearing capability. In addition, another factor may play significant role in formed section's load-bearing capacity which is the longitudinal residual strain. The longitudinal residual strain raised during forming procedure can be used to define the section imperfection of the formed section and its relation to the existence of defects. Therefore, the main motivation of this research paper is to perform three-dimensional finite element (3D-FE) to investigate peak longitudinal residual strains of a thin-walled steel plate with large bending angle along member length. A 3D finite element simulation in ABAQUS has been employed to simulate this forming process. The study concluded that the longitudinal residual strain at the section corner edge was higher than those at the rest of the corner region. These strains at the edge were higher than the yield strain ( ε y ) of the formed section which occurred due to the lack of transverse restraint. This made the plate edge tended to bend toward the normal direction when it was under a high transverse bending. This causes a significant difference in longitudinal strain at the plate edge.

ACS Style

Ayad Mutafi; N. Yidris; M.R. Ishak; R. Zahari. An investigation on longitudinal residual strains distribution of thin-walled press-braked cold formed steel sections using 3D FEM technique. Heliyon 2018, 4, e00937 .

AMA Style

Ayad Mutafi, N. Yidris, M.R. Ishak, R. Zahari. An investigation on longitudinal residual strains distribution of thin-walled press-braked cold formed steel sections using 3D FEM technique. Heliyon. 2018; 4 (11):e00937.

Chicago/Turabian Style

Ayad Mutafi; N. Yidris; M.R. Ishak; R. Zahari. 2018. "An investigation on longitudinal residual strains distribution of thin-walled press-braked cold formed steel sections using 3D FEM technique." Heliyon 4, no. 11: e00937.

Conference paper
Published: 26 September 2018 in IOP Conference Series: Materials Science and Engineering
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In the present study, ballistic impact analysis of double layered circular metal plates with different arrangements were investigated numerically using the finite element method. Nine different double layered plates configuration consist of steel 4340 (st), Aluminium 2014-T3 (Al), or titanium Ti-6A1-4V (Ti) having the same thickness were considered in this study and the energy absorption capability of each configuration were determined and compared. In order to validate the results obtained via the numerical method, an experimental ballistic test utilising a single stage gas gun was performed on single layer Al plates using a blunt projectile. It was found that the results obtained from numerical analysis agree well with the experimental results, which confirmed the accuracy of the numerical analysis procedure. The non-linear explicit finite element analysis employing Johnson-Cook plasticity material model coupled with was carried out using ABAQUS commercial package. A parametric study was conducted to determine the best configuration in terms of the energy absorption capability under ballistic impact. It was observed from the analysis that the double layered plate with titanium (front plate facing the projectile) and steel 4340 (back plate) produced the highest energy absorption with 279.72 J. However, the highest specific energy absorption (SEA) was given by titanium (front) and Aluminium (back) plate with 2830.45 J/kg.

ACS Style

Rizal Zahari; John Regan Pillai; Andrew Ordys; Mohamed Thariq Hameed Sultan; Noorfaizal Yidris. Ballistic impact analysis of double-layered metal plates. IOP Conference Series: Materials Science and Engineering 2018, 405, 012012 .

AMA Style

Rizal Zahari, John Regan Pillai, Andrew Ordys, Mohamed Thariq Hameed Sultan, Noorfaizal Yidris. Ballistic impact analysis of double-layered metal plates. IOP Conference Series: Materials Science and Engineering. 2018; 405 (1):012012.

Chicago/Turabian Style

Rizal Zahari; John Regan Pillai; Andrew Ordys; Mohamed Thariq Hameed Sultan; Noorfaizal Yidris. 2018. "Ballistic impact analysis of double-layered metal plates." IOP Conference Series: Materials Science and Engineering 405, no. 1: 012012.

Journal article
Published: 01 March 2017 in Materials Science Forum
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Carbon fibres and Kevlar fibres are among the commonly used fibres in the composite industry. As carbon fibres usually known for its superior strength, its low impact resistance limited its application in the industry. However, further research found that combining the high strength fibres with more ductile fibres like Kevlar could improve the material’s impact resistance. This hybrid effect was also found to be most effective by using intra-ply woven hybrid fibres in the composite. In this work, hybrid composite material was fabricated by using woven carbon-Kevlar cloths with epoxy matrix and the mechanical properties are determined at 0 ̊, 45 ̊ and 90 ̊. The hybrid composite material was found to have highest tensile strength at 0 ̊ (carbon) direction. As the material’s strength and tensile behaviour are different at every fibre types, the selection of fibre direction of the woven cloth in loading is an important criteria in any applications.

ACS Style

Nurain Hashim; Dayang Laila Abdul Majid; Rizal Zahari; Noorfaizal Yidris. Tensile Properties of Woven Carbon/Kevlar Reinforced Epoxy Hybrid Composite. Materials Science Forum 2017, 890, 20 -23.

AMA Style

Nurain Hashim, Dayang Laila Abdul Majid, Rizal Zahari, Noorfaizal Yidris. Tensile Properties of Woven Carbon/Kevlar Reinforced Epoxy Hybrid Composite. Materials Science Forum. 2017; 890 ():20-23.

Chicago/Turabian Style

Nurain Hashim; Dayang Laila Abdul Majid; Rizal Zahari; Noorfaizal Yidris. 2017. "Tensile Properties of Woven Carbon/Kevlar Reinforced Epoxy Hybrid Composite." Materials Science Forum 890, no. : 20-23.

Journal article
Published: 02 February 2017 in BioResources
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Thermogravimetric analysis and differential scanning calorimetry were used to study the thermal degradation and thermal stability of bamboo powder and its composites (EP-BFC) in a nitrogen atmosphere. The thermal stability of EP-BFC decreased as the bamboo filler-loading increased. Compared with epoxy, bamboo powder had a lower thermal stability, which reduced the thermal stability for the higher filler-loading composites. The addition of glass fibre to the EP-BFC improved the thermal stability of the new hybrid composites. Both the hybrid and non-hybrid composites exhibited similar thermal-induced degradation profiles that had only one mass loss step. However, a noticeable difference between the percentage value of the degradation between both the hybrid and non-hybrid composites showed that the EP/G-BFC hybrids were more thermally stable than the non-hybrid EP-BFC. Different materials experienced different activities, which were clearly shown from the DSC analysis. Bamboo fibre and non-fully cured epoxy exhibit exothermic peaks, while fully cured epoxy exhibits an endothermic peak.

ACS Style

Ain Umaira Md Shah; Mohamed Thariq Hameed Sultan; Francisco Cardona; Mohamad Jawaid; Abd Rahim Abu Talib; Noorfaizal Yidris. Thermal Analysis of Bamboo Fibre and Its Composites. BioResources 2017, 12, 1 .

AMA Style

Ain Umaira Md Shah, Mohamed Thariq Hameed Sultan, Francisco Cardona, Mohamad Jawaid, Abd Rahim Abu Talib, Noorfaizal Yidris. Thermal Analysis of Bamboo Fibre and Its Composites. BioResources. 2017; 12 (2):1.

Chicago/Turabian Style

Ain Umaira Md Shah; Mohamed Thariq Hameed Sultan; Francisco Cardona; Mohamad Jawaid; Abd Rahim Abu Talib; Noorfaizal Yidris. 2017. "Thermal Analysis of Bamboo Fibre and Its Composites." BioResources 12, no. 2: 1.

Journal article
Published: 01 October 2014 in Applied Mechanics and Materials
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This paper investigates the quasi static compression analysis behavior of a biocomposite radome using nonlinear static modeling. Bio-based fiber is proposed to be used in aircraft radome due to its low dielectric constant. In this instance, kenaf was being utilized as the natural fiber to form a hybrid combination of fiberglass/kenaf epoxy laminates. The quasi static behavior was modeled using MDNastran SOL106 Nonlinear Static. The radome was modeled as a hemispherical shell based on Beechcraft’s radome geometric configuration. The radome is designed as a four-layered laminates with randomly oriented fiberglass and kenaf. The nonlinear compression was performed in the range of 0.01 mm to 0.49 mm with a maximum reaction force of 189 N. The radome was not displaced equally or symmetrically as the translational load applied since the shape of radome is asymmetry and the surface at the top is uneven. The increment of the forces leads to elastic local flattening deformation at the apex of the radome. Its shape influences in determining the displacement and the stress to the radome.

ACS Style

Qistina Mohd Jamal; D.L. Majid; Mohd Yusoff Mohd Haris; Noorfaizal Yidris; M.T.H. Sultan. Quasi Static Analysis of a Biocomposite Aircraft Radome. Applied Mechanics and Materials 2014, 629, 78 -81.

AMA Style

Qistina Mohd Jamal, D.L. Majid, Mohd Yusoff Mohd Haris, Noorfaizal Yidris, M.T.H. Sultan. Quasi Static Analysis of a Biocomposite Aircraft Radome. Applied Mechanics and Materials. 2014; 629 ():78-81.

Chicago/Turabian Style

Qistina Mohd Jamal; D.L. Majid; Mohd Yusoff Mohd Haris; Noorfaizal Yidris; M.T.H. Sultan. 2014. "Quasi Static Analysis of a Biocomposite Aircraft Radome." Applied Mechanics and Materials 629, no. : 78-81.