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The enhanced carbon footprint of the construction sector has created the need for CO2 emission control and mitigation. CO2 emissions in the construction sector are influenced by a variety of factors, including raw material preparation, cement production, and, most notably, the construction process. Thus, using biobased constituents in cement could reduce CO2 emissions. However, biobased constituents can degrade and have a negative impact on cement performance. Recently, carbonised biomass known as biochar has been found to be an effective partial replacement for cement. Various studies have reported improved mechanical strength and thermal properties with the inclusion of biochar in concrete. To comprehend the properties of biochar-added cementitious materials, the properties of biochar and their effect on concrete need to be examined. This review provides a critical examination of the mechanical and thermal properties of biochar and biochar-added cementitious materials. The study also covers biochar’s life cycle assessment and economic benefits. Overall, the purpose of this review article is to provide a means for researchers in the relevant field to gain a deeper understanding of the innate properties of biochar imparted into biochar-added cementitious materials for property enhancement and reduction of CO2 emissions.
Rhoda Afriyie Mensah; Vigneshwaran Shanmugam; Sreenivasan Narayanan; Seyed Mohammad Javad Razavi; Adrian Ulfberg; Thomas Blanksvärd; Faez Sayahi; Peter Simonsson; Benjamin Reinke; Michael Försth; Gabriel Sas; Daria Sas; Oisik Das. Biochar-Added Cementitious Materials—A Review on Mechanical, Thermal, and Environmental Properties. Sustainability 2021, 13, 9336 .
AMA StyleRhoda Afriyie Mensah, Vigneshwaran Shanmugam, Sreenivasan Narayanan, Seyed Mohammad Javad Razavi, Adrian Ulfberg, Thomas Blanksvärd, Faez Sayahi, Peter Simonsson, Benjamin Reinke, Michael Försth, Gabriel Sas, Daria Sas, Oisik Das. Biochar-Added Cementitious Materials—A Review on Mechanical, Thermal, and Environmental Properties. Sustainability. 2021; 13 (16):9336.
Chicago/Turabian StyleRhoda Afriyie Mensah; Vigneshwaran Shanmugam; Sreenivasan Narayanan; Seyed Mohammad Javad Razavi; Adrian Ulfberg; Thomas Blanksvärd; Faez Sayahi; Peter Simonsson; Benjamin Reinke; Michael Försth; Gabriel Sas; Daria Sas; Oisik Das. 2021. "Biochar-Added Cementitious Materials—A Review on Mechanical, Thermal, and Environmental Properties." Sustainability 13, no. 16: 9336.
Filled hybrid composites are widely used in various structural applications where machining is critical. Hence, it is essential to understand the performance of the fibre composites’ machining behaviour. As such, a new hybrid structural composite was fabricated with redmud as filler and sisal fibre as reinforcement in polyester matrix. The composite was then tested for its drilling performance. A comprehensive drilling experiment was conducted using Taguchi L27 orthogonal array. The effect of the drill tool point angle, the cutting speed, the feed rate on thrust force, delamination, and burr formation were analysed for producing quality holes. The significance of each parameter was analysed, and the experimental outcomes revealed some important findings in the context of the drilling behaviour of sisal fibre/polyester composites with redmud as a filler. Spindle speed contributed 39% in affecting the thrust force, while the feed rate had the maximum influence of ca. 38% in affecting delamination.
Vigneshwaran Shanmugam; Uthayakumar Marimuthu; Sundarakannan Rajendran; Arumugaprabu Veerasimman; Adamkhan Basha; Mohd Majid; Rasoul Esmaeely Neisiany; Michael Försth; Gabriel Sas; Seyed Javad Razavi; Oisik Das. Experimental Investigation of Thrust Force, Delamination and Surface Roughness in Drilling Hybrid Structural Composites. Materials 2021, 14, 4468 .
AMA StyleVigneshwaran Shanmugam, Uthayakumar Marimuthu, Sundarakannan Rajendran, Arumugaprabu Veerasimman, Adamkhan Basha, Mohd Majid, Rasoul Esmaeely Neisiany, Michael Försth, Gabriel Sas, Seyed Javad Razavi, Oisik Das. Experimental Investigation of Thrust Force, Delamination and Surface Roughness in Drilling Hybrid Structural Composites. Materials. 2021; 14 (16):4468.
Chicago/Turabian StyleVigneshwaran Shanmugam; Uthayakumar Marimuthu; Sundarakannan Rajendran; Arumugaprabu Veerasimman; Adamkhan Basha; Mohd Majid; Rasoul Esmaeely Neisiany; Michael Försth; Gabriel Sas; Seyed Javad Razavi; Oisik Das. 2021. "Experimental Investigation of Thrust Force, Delamination and Surface Roughness in Drilling Hybrid Structural Composites." Materials 14, no. 16: 4468.
Functionalized polyacrylonitrile (PAN) nanofibers were used in the present investigation to enhance the fracture behavior of carbon epoxy composite in order to prevent delamination if any crack propagates in the resin rich area. The main intent of this investigation was to analyze the efficiency of PAN nanofiber as a reinforcing agent for the carbon fiber-based epoxy structural composite. The composites were fabricated with stacked unidirectional carbon fibers and the PAN powder was functionalized with glycidyl methacrylate (GMA) and then used as reinforcement. The fabricated composites’ fracture behavior was analyzed through a double cantilever beam test and the energy release rate of the composites was investigated. The neat PAN and functionalized PAN-reinforced samples had an 18% and a 50% increase in fracture energy, respectively, compared to the control composite. In addition, the samples reinforced with functionalized PAN nanofibers had 27% higher interlaminar strength compared to neat PAN-reinforced composite, implying more efficient stress transformation as well as stress distribution from the matrix phase (resin-rich area) to the reinforcement phase (carbon/phase) of the composites. The enhancement of fracture toughness provides an opportunity to alleviate the prevalent issues in laminated composites for structural operations and facilitate their adoption in industries for critical applications.
Seyed Razavi; Rasoul Neisiany; Moe Razavi; Afsaneh Fakhar; Vigneshwaran Shanmugam; Vasudevan Alagumalai; Michael Försth; Gabriel Sas; Oisik Das. Efficient Improvement in Fracture Toughness of Laminated Composite by Interleaving Functionalized Nanofibers. Polymers 2021, 13, 2509 .
AMA StyleSeyed Razavi, Rasoul Neisiany, Moe Razavi, Afsaneh Fakhar, Vigneshwaran Shanmugam, Vasudevan Alagumalai, Michael Försth, Gabriel Sas, Oisik Das. Efficient Improvement in Fracture Toughness of Laminated Composite by Interleaving Functionalized Nanofibers. Polymers. 2021; 13 (15):2509.
Chicago/Turabian StyleSeyed Razavi; Rasoul Neisiany; Moe Razavi; Afsaneh Fakhar; Vigneshwaran Shanmugam; Vasudevan Alagumalai; Michael Försth; Gabriel Sas; Oisik Das. 2021. "Efficient Improvement in Fracture Toughness of Laminated Composite by Interleaving Functionalized Nanofibers." Polymers 13, no. 15: 2509.
Natural fibre-based composites are replacing traditional materials in a wide range of structural applications that are used in different environments. Natural fibres suffer from thermal shocks, which affects the use of these composites in cold environment. Considering these, a goal was set in the present research to investigate the impact of cryogenic conditions on natural fibre composites. Composites were developed using polyester as matrix and jute-fibre and waste Teak saw-dust as reinforcement and filler, respectively. The effects of six parameters, viz., density of saw-dust, weight ratio of saw-dust, grade of woven-jute, number of jute layers, duration of cryogenic treatment of composite and duration of alkaline treatment of fibres on the mechanical properties of the composite was evaluated with an objective to maximise hardness, tensile, impact and flexural strengths. Taguchi method was used to design the experiments and response-surface methodology was used to model, predict and plot interactive surface plots. Results indicated that the duration of cryogenic treatment had a significant effect on mechanical properties, which was better only up to 60 min. The models were found to be statistically significant. The study concluded that saw-dust of density 300 kg/m3 used as a filler with a weight ratio of 13 wt.% and a reinforcement of a single layer of woven-jute-fibre mat of grade 250 gsm subjected to alkaline treatment for 4 h in a composite that has undergone 45 min of cryogenic treatment presented an improvement of 64% in impact strength, ca. 21% in flexural strength, ca. 158% in tensile strength and ca. 28% in hardness.
Velmurugan Ganesan; Vigneshwaran Shanmugam; Babu Kaliyamoorthy; Sekar Sanjeevi; Suresh Shanmugam; Vasudevan Alagumalai; Yoganandam Krishnamoorthy; Michael Försth; Gabriel Sas; Seyed Javad Razavi; Oisik Das. Optimisation of Mechanical Properties in Saw-Dust/Woven-Jute Fibre/Polyester Structural Composites under Liquid Nitrogen Environment Using Response Surface Methodology. Polymers 2021, 13, 2471 .
AMA StyleVelmurugan Ganesan, Vigneshwaran Shanmugam, Babu Kaliyamoorthy, Sekar Sanjeevi, Suresh Shanmugam, Vasudevan Alagumalai, Yoganandam Krishnamoorthy, Michael Försth, Gabriel Sas, Seyed Javad Razavi, Oisik Das. Optimisation of Mechanical Properties in Saw-Dust/Woven-Jute Fibre/Polyester Structural Composites under Liquid Nitrogen Environment Using Response Surface Methodology. Polymers. 2021; 13 (15):2471.
Chicago/Turabian StyleVelmurugan Ganesan; Vigneshwaran Shanmugam; Babu Kaliyamoorthy; Sekar Sanjeevi; Suresh Shanmugam; Vasudevan Alagumalai; Yoganandam Krishnamoorthy; Michael Försth; Gabriel Sas; Seyed Javad Razavi; Oisik Das. 2021. "Optimisation of Mechanical Properties in Saw-Dust/Woven-Jute Fibre/Polyester Structural Composites under Liquid Nitrogen Environment Using Response Surface Methodology." Polymers 13, no. 15: 2471.
Magnesium and its alloys have increasingly gained attention due to their attractive properties, including the high specific strength that makes them suitable for several applications in different industries. However, their applications in load‐bearing components require an understanding of their fracture behavior especially when notches are present which is still limited. The aim of this work is to investigate the fracture behavior of notched ZK60‐T5 magnesium. Eleven different U‐ and V‐notched geometries were examined. The mechanical tests showed that the presence of notches reduces the ductility of the material. This was confirmed by the SEM as the size of the shear lips was shown to decrease by increasing the notch acuity. The Strain Energy Density (SED) is used to predict the failure loads of the differently notched samples, and the results suggest high reliability of this approach with deviations between the theoretical and experimental data often lower than 10%.
Jafar Albinmousa; Mirco Peron; Seyed Mohammad Javad Razavi; Mohammed Al Hussain; Ahmed Al‐Ghanim; Filippo Berto. Experimental characterization and theoretical prediction of quasi‐static fracture behavior of notched ZK60‐T5 Mg samples. Fatigue & Fracture of Engineering Materials & Structures 2021, 44, 1484 -1497.
AMA StyleJafar Albinmousa, Mirco Peron, Seyed Mohammad Javad Razavi, Mohammed Al Hussain, Ahmed Al‐Ghanim, Filippo Berto. Experimental characterization and theoretical prediction of quasi‐static fracture behavior of notched ZK60‐T5 Mg samples. Fatigue & Fracture of Engineering Materials & Structures. 2021; 44 (6):1484-1497.
Chicago/Turabian StyleJafar Albinmousa; Mirco Peron; Seyed Mohammad Javad Razavi; Mohammed Al Hussain; Ahmed Al‐Ghanim; Filippo Berto. 2021. "Experimental characterization and theoretical prediction of quasi‐static fracture behavior of notched ZK60‐T5 Mg samples." Fatigue & Fracture of Engineering Materials & Structures 44, no. 6: 1484-1497.
Additive manufacturing of industrially-relevant high-performance parts and products is today a reality, especially for metal additive manufacturing technologies. The design complexity that is now possible makes it particularly useful to improve product performance in a variety of applications. Metal additive manufacturing is especially well matured and is being used for production of end-use mission-critical parts. The next level of this development includes the use of intentionally designed porous metals - architected cellular or lattice structures. Cellular structures can be designed or tailored for specific mechanical or other performance characteristics and have numerous advantages due to their large surface area, low mass, regular repeated structure and open interconnected pore spaces. This is considered particularly useful for medical implants and for lightweight automotive and aerospace components, which are the main industry drivers at present. Architected cellular structures behave similar to open cell foams, which have found many other industrial applications to date, such as sandwich panels for impact absorption, radiators for thermal management, filters or catalyst materials, sound insulation, amongst others. The advantage of additively manufactured cellular structures is the precise control of the micro-architecture which becomes possible. The huge potential of these porous architected cellular materials manufactured by additive manufacturing is currently limited by concerns over their structural integrity. This is a valid concern, when considering the complexity of the manufacturing process, and the only recent maturation of metal additive manufacturing technologies. Many potential manufacturing errors can occur, which have so far resulted in a widely disparate set of results in the literature for these types of structures, with especially poor fatigue properties often found. These have improved over the years, matching the maturation and improvement of the metal additive manufacturing processes. As the causes of errors and effects of these on mechanical properties are now better understood, many of the underlying issues can be removed or mitigated. This makes additively manufactured cellular structures a highly valid option for disruptive new and improved industrial products. This review paper discusses the progress to date in the improvement of the fatigue performance of cellular structures manufactured by additive manufacturing, especially metal-based, providing insights and a glimpse to the future for fatigue-tolerant additively manufactured architected cellular materials.
M. Benedetti; A. du Plessis; R.O. Ritchie; M. Dallago; S.M.J. Razavi; F. Berto. Architected cellular materials: A review on their mechanical properties towards fatigue-tolerant design and fabrication. Materials Science and Engineering: R: Reports 2021, 144, 100606 .
AMA StyleM. Benedetti, A. du Plessis, R.O. Ritchie, M. Dallago, S.M.J. Razavi, F. Berto. Architected cellular materials: A review on their mechanical properties towards fatigue-tolerant design and fabrication. Materials Science and Engineering: R: Reports. 2021; 144 ():100606.
Chicago/Turabian StyleM. Benedetti; A. du Plessis; R.O. Ritchie; M. Dallago; S.M.J. Razavi; F. Berto. 2021. "Architected cellular materials: A review on their mechanical properties towards fatigue-tolerant design and fabrication." Materials Science and Engineering: R: Reports 144, no. : 100606.
The effects of geometrical constraints on the fracture initiation location and the fracture strength are evaluated in U‐notched specimens using theoretical and experimental analyses. It is proven that high geometrical constraints in pure mode I loading of geometrically symmetric U‐notched specimens can result in occurrence of the maximum tangential stress (MTS) at two symmetric points on both sides of the notch bisector line. The experiments also indicated that the fracture takes place from a direction that is not along the notch bisector line. The experimental results are then examined theoretically through a stress‐based brittle fracture criterion. Because the conventional MTS criterion was poor to predict the onset of fracture properly, an attempt is made to use the generalized MTS (GMTS) criterion by considering the higher order terms in the fracture model. It is shown that the GMTS criterion gives very good predictions for experimentally obtained values of crack initiation angle and notch fracture resistance.
Robab Bahadori; Majid R. Ayatollahi; Seyed Mohammad Javad Razavi; Filippo Berto. Geometry effects on mode I brittle fracture in U‐notched specimens. Fatigue & Fracture of Engineering Materials & Structures 2020, 44, 901 -915.
AMA StyleRobab Bahadori, Majid R. Ayatollahi, Seyed Mohammad Javad Razavi, Filippo Berto. Geometry effects on mode I brittle fracture in U‐notched specimens. Fatigue & Fracture of Engineering Materials & Structures. 2020; 44 (4):901-915.
Chicago/Turabian StyleRobab Bahadori; Majid R. Ayatollahi; Seyed Mohammad Javad Razavi; Filippo Berto. 2020. "Geometry effects on mode I brittle fracture in U‐notched specimens." Fatigue & Fracture of Engineering Materials & Structures 44, no. 4: 901-915.
In this paper Cobalt-Chromium-Molybdenum (Co-Cr-Mo) specimens produced by Selective Laser Melting (SLM) for biomedical field were studied. In particular, fatigue tests were carried out comparing as-built condition with Hot Isostatic Pressing (HIP) and a heat treatment under vacuum condition. The influence on microstructure and fatigue properties was investigated on plain specimens and with a V-notched geometry. Both vacuum heat treatment and HIP had effects on the microstructure and internal defects, which resulted in an enhancement of quasi-static and fatigue properties. Lastly, notch sensitivity and applicability of ASED failure criterion for fatigue life prediction notched specimens were evaluated.
Seyed Mohammad Javad Razavi; Andrea Avanzini; Giovanna Cornacchia; Luca Giorleo; Filippo Berto. Effect of heat treatment on fatigue behavior of as-built notched Co-Cr-Mo parts produced by Selective Laser Melting. International Journal of Fatigue 2020, 142, 105926 .
AMA StyleSeyed Mohammad Javad Razavi, Andrea Avanzini, Giovanna Cornacchia, Luca Giorleo, Filippo Berto. Effect of heat treatment on fatigue behavior of as-built notched Co-Cr-Mo parts produced by Selective Laser Melting. International Journal of Fatigue. 2020; 142 ():105926.
Chicago/Turabian StyleSeyed Mohammad Javad Razavi; Andrea Avanzini; Giovanna Cornacchia; Luca Giorleo; Filippo Berto. 2020. "Effect of heat treatment on fatigue behavior of as-built notched Co-Cr-Mo parts produced by Selective Laser Melting." International Journal of Fatigue 142, no. : 105926.
Incorporation of metallic fibers into bonding line has been considered as an efficient way to reinforce the adhesive joints. The aim of this paper is to evaluate the fatigue behavior of the metallic fiber-reinforced adhesives. Single Lap Joints (SLJ) with various fiber distances were fabricated and tested under various fatigue loading levels to obtain the stress-fatigue life curves. The experimental results revealed that incorporation of the metallic fibers in adhesive layer improves the load sharing in the bonding line resulting in higher fatigue strengths for the case of reinforced adhesive joints.
S.M.J. Razavi; E. Scott Bale; F. Berto. Mechanical behavior of metallic fiber-reinforced adhesive under cyclic loading. Procedia Structural Integrity 2020, 26, 225 -228.
AMA StyleS.M.J. Razavi, E. Scott Bale, F. Berto. Mechanical behavior of metallic fiber-reinforced adhesive under cyclic loading. Procedia Structural Integrity. 2020; 26 ():225-228.
Chicago/Turabian StyleS.M.J. Razavi; E. Scott Bale; F. Berto. 2020. "Mechanical behavior of metallic fiber-reinforced adhesive under cyclic loading." Procedia Structural Integrity 26, no. : 225-228.
The mechanical behavior of metallic fiber reinforced adhesively bonded Single Lap Joints (SLJ) under dynamic loading has been studied. The effect of different fiber spacing along the joint width on the strength of SLJs was investigated experimentally. The experimental tests were conducted on non-reinforced and reinforced adhesives joints fabricated using Araldite 2015 adhesive. The experimental results indicated that introducing the metallic fibers in the adhesive layer improved the shear strength of SLJs. This improvement was observed to be maximum under higher loading rates. Additionally, the improvements were found to be de-pendent on the spacing between the metal macrofibers for which lower fiber distancing result-ed in higher failure load improvements.
S.M.J. Razavi; E. Scott Bale; F. Berto; C. Bertolin. Mechanical behavior of metallic fiber-reinforced adhesive under dynamic loading. Procedia Structural Integrity 2020, 26, 229 -233.
AMA StyleS.M.J. Razavi, E. Scott Bale, F. Berto, C. Bertolin. Mechanical behavior of metallic fiber-reinforced adhesive under dynamic loading. Procedia Structural Integrity. 2020; 26 ():229-233.
Chicago/Turabian StyleS.M.J. Razavi; E. Scott Bale; F. Berto; C. Bertolin. 2020. "Mechanical behavior of metallic fiber-reinforced adhesive under dynamic loading." Procedia Structural Integrity 26, no. : 229-233.
The main goal of the present research is to check if J-integral criterion is capable of predicting the onset of brittle fracture in key-hole notched isostatic poly-granular graphite plates. In this way, this article provides the prediction of fracture loads in several key-hole notched rectangular graphite specimens with five different notch tip radii subjected to pure mode I loading condition, which has been previously reported in the literature by Lazzarin et al. (2013). The fracture load predictions for five dimensional cases were obtained through the J-integral calculations. It is revealed that the J-integral criterion is capable of predicting well the fracture loads of graphite key-hole notched specimens, independent of the size of key-hole notch.
S.M.J. Razavi; H.R. Majidi; F. Berto. Brittle fracture prediction of key-hole notched specimens by means of J-integral expression. Procedia Structural Integrity 2020, 26, 246 -250.
AMA StyleS.M.J. Razavi, H.R. Majidi, F. Berto. Brittle fracture prediction of key-hole notched specimens by means of J-integral expression. Procedia Structural Integrity. 2020; 26 ():246-250.
Chicago/Turabian StyleS.M.J. Razavi; H.R. Majidi; F. Berto. 2020. "Brittle fracture prediction of key-hole notched specimens by means of J-integral expression." Procedia Structural Integrity 26, no. : 246-250.
Geometric constraint is one of the important issues that affect the fracture behavior of different notched components. Specimens with the same notch geometry can have different fracture strengths due to the geometric constraints around the notch tip. In this paper, the fracture behavior of three different testing specimens made of General Purpose Polystyrene (GPPS) has been studied using an energy-based criterion namely the Average Strain Energy Density (ASED) criterion. According to the formulation of the ASED criterion, all the stress terms around the notch tip were taken into account by considering a volumetric energy-based criterion and the brittle fracture of different GPPS specimens with various geometry constraints were well predicted.
S.M.J. Razavi; M.R. Ayatollahi; M. Shahmohammadi; F. Berto. Geometry effect on fracture behavior of V-notched specimens. Procedia Structural Integrity 2020, 26, 234 -239.
AMA StyleS.M.J. Razavi, M.R. Ayatollahi, M. Shahmohammadi, F. Berto. Geometry effect on fracture behavior of V-notched specimens. Procedia Structural Integrity. 2020; 26 ():234-239.
Chicago/Turabian StyleS.M.J. Razavi; M.R. Ayatollahi; M. Shahmohammadi; F. Berto. 2020. "Geometry effect on fracture behavior of V-notched specimens." Procedia Structural Integrity 26, no. : 234-239.
Crack growth is investigated numerically in a cruciform specimen with an inclined center crack subjected to biaxial fatigue loading. The mixed-mode fatigue crack growth was examined using a parametric study both on the biaxial stress ratio and the initial crack angle. A fatigue crack growth code for two-dimensional problems was developed to investigate the mixed-mode behavior of fatigue crack growth under biaxial loading. The effects of initial crack angle and the biaxial stress ratio on the specimen fatigue life are explored using finite element analysis and the results are discussed.
S.M.J. Razavi; M.R. Ayatollahi; F. Berto. Assessment of mixed mode fatigue crack growth under biaxial loading using an iterative technique. Procedia Structural Integrity 2020, 26, 240 -245.
AMA StyleS.M.J. Razavi, M.R. Ayatollahi, F. Berto. Assessment of mixed mode fatigue crack growth under biaxial loading using an iterative technique. Procedia Structural Integrity. 2020; 26 ():240-245.
Chicago/Turabian StyleS.M.J. Razavi; M.R. Ayatollahi; F. Berto. 2020. "Assessment of mixed mode fatigue crack growth under biaxial loading using an iterative technique." Procedia Structural Integrity 26, no. : 240-245.
Various types of graphite have gained interest in many industrial applications due to their high strength and excellent heat tolerance. However, due to the brittle nature of this material, presence of stress concentrators such as notches and geometrical discontinuities considerably re-duces the overall loading bearing of the graphite components. Here we evaluate the applicability of the Cohesive Zone Model (CZM) for the assessment of the fracture strength of experimentally tested U-notched specimens subject to mode I loading. The fracture loads of U-notched components with different notch tip radii can be predicted with an average discrepancy of ±7%.
S.M.J. Razavi; H.R. Majidi; F. Berto; M.R. Ayatollahi. Fracture assessment of U-notched graphite specimens by means of cohesive zone model. Procedia Structural Integrity 2020, 26, 251 -255.
AMA StyleS.M.J. Razavi, H.R. Majidi, F. Berto, M.R. Ayatollahi. Fracture assessment of U-notched graphite specimens by means of cohesive zone model. Procedia Structural Integrity. 2020; 26 ():251-255.
Chicago/Turabian StyleS.M.J. Razavi; H.R. Majidi; F. Berto; M.R. Ayatollahi. 2020. "Fracture assessment of U-notched graphite specimens by means of cohesive zone model." Procedia Structural Integrity 26, no. : 251-255.
The geometry and material properties of additively manufactured (AM) parts are closely related in a way that any alteration in geometry of the part will change the underlying manufacturing strategy. This in turn, affects the microstructure and consequently, the mechanical behavior of material. This paper aims to evaluate the effect of the AM part’s thickness and geometry on microstructure, surface roughness, and mechanical properties under quasi-static and fatigue loading conditions by performing experimental tests. A series of Ti-6Al-4 V specimens with three different thicknesses and two different geometries were fabricated using electron beam melting (EBM). The results of microstructural analyses revealed that specimens with lower build thickness experience finer grain size, higher microhardness, and lower elongation at failure. Although the microstructure of the produced parts was strongly affected by the build thickness, different surface to volume ratios eliminated the effect of microstructural differences and governed the fatigue properties of the parts. The size effect on the microstructural features, geometrical appearance, mechanical properties of the AM parts should be considered for the design and failure analysis of complex structures.
S.M.J. Razavi; B. Van Hooreweder; F. Berto. Effect of build thickness and geometry on quasi-static and fatigue behavior of Ti-6Al-4V produced by Electron Beam Melting. Additive Manufacturing 2020, 36, 101426 .
AMA StyleS.M.J. Razavi, B. Van Hooreweder, F. Berto. Effect of build thickness and geometry on quasi-static and fatigue behavior of Ti-6Al-4V produced by Electron Beam Melting. Additive Manufacturing. 2020; 36 ():101426.
Chicago/Turabian StyleS.M.J. Razavi; B. Van Hooreweder; F. Berto. 2020. "Effect of build thickness and geometry on quasi-static and fatigue behavior of Ti-6Al-4V produced by Electron Beam Melting." Additive Manufacturing 36, no. : 101426.
Atefeh Aramian; Seyed Mohammad Javad Razavi; Zohreh Sadeghian; Filippo Berto. A review of additive manufacturing of cermets. Additive Manufacturing 2020, 33, 1 .
AMA StyleAtefeh Aramian, Seyed Mohammad Javad Razavi, Zohreh Sadeghian, Filippo Berto. A review of additive manufacturing of cermets. Additive Manufacturing. 2020; 33 ():1.
Chicago/Turabian StyleAtefeh Aramian; Seyed Mohammad Javad Razavi; Zohreh Sadeghian; Filippo Berto. 2020. "A review of additive manufacturing of cermets." Additive Manufacturing 33, no. : 1.
Filippo Berto; Ali Fatemi; Nima Shamsaei; Seyed Mohammad Javad Razavi. Fatigue Assessment of 17-4 PH Stainless Steel Notched Specimens Made by Direct Metal Laser Sintering. Structural Integrity of Additive Manufactured Parts 2020, 415 -422.
AMA StyleFilippo Berto, Ali Fatemi, Nima Shamsaei, Seyed Mohammad Javad Razavi. Fatigue Assessment of 17-4 PH Stainless Steel Notched Specimens Made by Direct Metal Laser Sintering. Structural Integrity of Additive Manufactured Parts. 2020; ():415-422.
Chicago/Turabian StyleFilippo Berto; Ali Fatemi; Nima Shamsaei; Seyed Mohammad Javad Razavi. 2020. "Fatigue Assessment of 17-4 PH Stainless Steel Notched Specimens Made by Direct Metal Laser Sintering." Structural Integrity of Additive Manufactured Parts , no. : 415-422.
The permeability level and resistance of the concrete cutoff wall of earth dam on the penetration of fluids are crucial factors and have an essential effect on the stability of the concrete core. In this research, the simultaneous incorporation of nano-carbon black and nano-silica in the concrete with nine different mixing patterns is considered to investigate the permeability and mechanical properties of the concrete. Experimental results revealed that the addition of nanoparticles to the concrete considerably decreases permeability; while reducing the compressive strength in some mixtures and increasing the bending strength of the modified concrete in most of the studied cases.
M. Rezania; M. Panahandeh; S.M.J. Razavi; F. Berto. Experimental study of the simultaneous effect of nano-silica and nano-carbon black on permeability and mechanical properties of the concrete. Theoretical and Applied Fracture Mechanics 2019, 104, 102391 .
AMA StyleM. Rezania, M. Panahandeh, S.M.J. Razavi, F. Berto. Experimental study of the simultaneous effect of nano-silica and nano-carbon black on permeability and mechanical properties of the concrete. Theoretical and Applied Fracture Mechanics. 2019; 104 ():102391.
Chicago/Turabian StyleM. Rezania; M. Panahandeh; S.M.J. Razavi; F. Berto. 2019. "Experimental study of the simultaneous effect of nano-silica and nano-carbon black on permeability and mechanical properties of the concrete." Theoretical and Applied Fracture Mechanics 104, no. : 102391.
Klas Solberg; Shuai Guan; Seyed Mohammad Javad Razavi; Torgeir Welo; K.C. Chan; Filippo Berto. Fatigue of additively manufactured 316L stainless steel: The influence of porosity and surface roughness. Fatigue & Fracture of Engineering Materials & Structures 2019, 42, 2043 -2052.
AMA StyleKlas Solberg, Shuai Guan, Seyed Mohammad Javad Razavi, Torgeir Welo, K.C. Chan, Filippo Berto. Fatigue of additively manufactured 316L stainless steel: The influence of porosity and surface roughness. Fatigue & Fracture of Engineering Materials & Structures. 2019; 42 (9):2043-2052.
Chicago/Turabian StyleKlas Solberg; Shuai Guan; Seyed Mohammad Javad Razavi; Torgeir Welo; K.C. Chan; Filippo Berto. 2019. "Fatigue of additively manufactured 316L stainless steel: The influence of porosity and surface roughness." Fatigue & Fracture of Engineering Materials & Structures 42, no. 9: 2043-2052.
The knowledge of self‐healing was developed to ensure more durable and reliable engineering materials. Healing agent encapsulation has shown to be one of the most promising approaches in self‐healing technology. The healing agents were encapsulated within micro/nanocapsules, micro/nanofibers, and vascular‐based networks. Among the methods, using core‐shell nanofibers showed a compromising potential for the development of self‐healing nanofibers with the minimum drawbacks and limitations. The aim of the present paper is to report the recent contributions on the recent progress of self‐healing materials using core‐shell nanofibers to provide insights for the further development of self‐healing polymeric materials both in academic research and scalable fabrication of polymeric parts in the industries.
Rasoul Esmaeely Neisiany; Saied Nouri Khorasani; Jeremy Kong Yoong Lee; Javad Razavi; Mohammad Saeid Enayati; Mohammadreza Naeimirad; Filippo Berto; Seeram Ramakrishna. Core‐shell nanofibers for developing self‐healing materials: Recent progress and future directions. Material Design & Processing Communications 2019, e90 .
AMA StyleRasoul Esmaeely Neisiany, Saied Nouri Khorasani, Jeremy Kong Yoong Lee, Javad Razavi, Mohammad Saeid Enayati, Mohammadreza Naeimirad, Filippo Berto, Seeram Ramakrishna. Core‐shell nanofibers for developing self‐healing materials: Recent progress and future directions. Material Design & Processing Communications. 2019; ():e90.
Chicago/Turabian StyleRasoul Esmaeely Neisiany; Saied Nouri Khorasani; Jeremy Kong Yoong Lee; Javad Razavi; Mohammad Saeid Enayati; Mohammadreza Naeimirad; Filippo Berto; Seeram Ramakrishna. 2019. "Core‐shell nanofibers for developing self‐healing materials: Recent progress and future directions." Material Design & Processing Communications , no. : e90.