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M. D. Goel
Department of Applied Mechanics, Visvesvaraya National Institute of Technology (VNIT), Nagpur 440010, Maharashtra, India

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Review
Published: 18 May 2021 in Buildings
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The column buckling problem was first investigated by Leonhard Euler in 1757. Since then, numerous efforts have been made to enhance the buckling capacity of slender columns, because of their importance in structural, mechanical, aeronautical, biomedical, and several other engineering fields. Buckling analysis has become a critical aspect, especially in the safety engineering design since, at the time of failure, the actual stress at the point of failure is significantly lower than the material capability to withstand the imposed loads. With the recent advancement in materials and composites, the load-carrying capacity of columns has been remarkably increased, without any significant increase in their size, thus resulting in even more slender compressive members that can be susceptible to buckling collapse. Thus, nonuniformity in columns can be achieved in two ways—either by varying the material properties or by varying the cross section (i.e., shape and size). Both these methods are preferred because they actually inherited the advantage of the reduction in the dead load of the column. Hence, an attempt is made herein to present an abridged review on the buckling analysis of the columns with major emphasis on the buckling of nonuniform and functionally graded columns. Moreover, the paper provides a concise discussion on references that could be helpful for researchers and designers to understand and address the relevant buckling parameters.

ACS Style

Manmohan Goel; Chiara Bedon; Adesh Singh; Ashish Khatri; Laxmikant Gupta. An Abridged Review of Buckling Analysis of Compression Members in Construction. Buildings 2021, 11, 211 .

AMA Style

Manmohan Goel, Chiara Bedon, Adesh Singh, Ashish Khatri, Laxmikant Gupta. An Abridged Review of Buckling Analysis of Compression Members in Construction. Buildings. 2021; 11 (5):211.

Chicago/Turabian Style

Manmohan Goel; Chiara Bedon; Adesh Singh; Ashish Khatri; Laxmikant Gupta. 2021. "An Abridged Review of Buckling Analysis of Compression Members in Construction." Buildings 11, no. 5: 211.

Journal article
Published: 02 March 2021 in Underground Space
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In this study, a finite element (FE) analysis of shallow tunnels exposed to a blast inside the tunnel, with soil as surrounding media and a structure at ground level, was performed. The ConWep program, developed by the US Army, was used to simulate blast loading using ABAQUS/Explicit®. Drucker–Prager (D–P) plasticity model, concrete damage plasticity (CDP), and Johnson–Cook (J–C) plasticity models were used to define the behavior of the soil, concrete, and reinforcement, respectively. FE analysis was carried out to compare the damages to the superstructure with variation in the cross-sectional shapes of the tunnel under internal blast loading. Three tunnel shapes (circular, rectangular, and horseshoe cross-sections) were considered in the FE analysis. An explosive of 100 kg TNT was located at the center of the cross-section of the tunnel. The response of the tunnel in terms of displacement and stress at critical locations was computed. The results showed that changes in the cross-section of the tunnel affect the stability of the tunnel, even when keeping all other factors constant. It was observed that the intensity of the stresses is the highest for a rectangular tunnel and lowest for a circular tunnel. Furthermore, it was also determined that the tunnel with a rectangular cross-section experienced the maximum displacement in the reinforced concrete (RC) lining compared with the horseshoe and circular tunnels. The displacement measured at critical structural members of the superstructure was found to be the highest for the tunnel with a rectangular cross section and lowest for the tunnel with a circular cross section.

ACS Style

M.D. Goel; Shivani Verma; Jagriti Mandal; Sandeep Panchal. Effect of Blast inside Tunnel on Surrounding Soil Mass, Tunnel Lining, and Superstructure for Varying Shapes of Tunnels. Underground Space 2021, 1 .

AMA Style

M.D. Goel, Shivani Verma, Jagriti Mandal, Sandeep Panchal. Effect of Blast inside Tunnel on Surrounding Soil Mass, Tunnel Lining, and Superstructure for Varying Shapes of Tunnels. Underground Space. 2021; ():1.

Chicago/Turabian Style

M.D. Goel; Shivani Verma; Jagriti Mandal; Sandeep Panchal. 2021. "Effect of Blast inside Tunnel on Surrounding Soil Mass, Tunnel Lining, and Superstructure for Varying Shapes of Tunnels." Underground Space , no. : 1.

Original paper
Published: 27 January 2021 in Archives of Computational Methods in Engineering
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Partially or fully buried explosive on detonation releases a large amount of kinetic energy a part of which gets dissipated during creation of crater and the rest gets converted into ground shock. Both phenomena are of complex nature with involvement of non-linearity in both loading and material characteristics. This review aims at providing an insight into mechanisms involved during an event of buried explosion with varying degree of confinement. Factors affecting crater formation and ground shock propagation in media are discussed in detail. An overview of various prediction methods developed over the years based on dimensional analysis and theory of similarity to estimate crater dimensions and magnitude of ground shock and ground motion along with their limitations is presented. Prediction models used to define and optimise rock fragmentation distribution in surface mining operations are additionally reviewed and discussed. Various state-of-the-art experimental and numerical techniques are discussed in brief. Finally, it discusses the challenges involved in both experimental and numerical analysis and thereby provides alternative solutions and suggestions for further investigations in specific areas of lacuna.

ACS Style

Jagriti Mandal; M. D. Goel; A. K. Agarwal. Surface and Buried Explosions: An Explorative Review with Recent Advances. Archives of Computational Methods in Engineering 2021, 1 -21.

AMA Style

Jagriti Mandal, M. D. Goel, A. K. Agarwal. Surface and Buried Explosions: An Explorative Review with Recent Advances. Archives of Computational Methods in Engineering. 2021; ():1-21.

Chicago/Turabian Style

Jagriti Mandal; M. D. Goel; A. K. Agarwal. 2021. "Surface and Buried Explosions: An Explorative Review with Recent Advances." Archives of Computational Methods in Engineering , no. : 1-21.

Review
Published: 13 January 2021 in Archives of Computational Methods in Engineering
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Computation of penetration, scabbing and perforation depth under projectile impact is a highly non-linear and complex phenomenon. There exist various formulae, mainly empirical in nature, to estimate these depths under a given scenario. However, there exist a large difference between these depths computed using available empirical formulae and those observed during actual tests. In the present study, these formulae have been revisited by considering their merits and limitations and an abridged review is presented herein for a new researcher to start research in this area. Further, various methods for computation of penetration, scabbing and perforation depth are also presented and best method to compute the penetration, scabbing and perforation depth is discussed. This study will serve the basis for first order approximate computation of these depths using various computational tools as available now a days.

ACS Style

M. D. Goel; Krishna Prasad Kallada; I. L. Muthreja. An Abridged Review of Empirical Formulae for Computation of Penetration, Scabbing and Perforation Depth Under Projectile Impact. Archives of Computational Methods in Engineering 2021, 1 -10.

AMA Style

M. D. Goel, Krishna Prasad Kallada, I. L. Muthreja. An Abridged Review of Empirical Formulae for Computation of Penetration, Scabbing and Perforation Depth Under Projectile Impact. Archives of Computational Methods in Engineering. 2021; ():1-10.

Chicago/Turabian Style

M. D. Goel; Krishna Prasad Kallada; I. L. Muthreja. 2021. "An Abridged Review of Empirical Formulae for Computation of Penetration, Scabbing and Perforation Depth Under Projectile Impact." Archives of Computational Methods in Engineering , no. : 1-10.

Journal article
Published: 04 December 2020 in Advances in Civil Engineering
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Single-degree-of-freedom (SDOF) models are known to represent a valid tool in support of design. Key assumptions of these models, on the other hand, can strongly affect the expected predictions, hence resulting in possible overconservative or misleading estimates for the response of real structural systems under extreme actions. Among others, the description of the input loads can be responsible for major design issues, thus requiring the use of more refined approaches. In this paper, a SDOF model is developed for thin elastic plates under large displacements. Based on the energy approach, careful attention is given for the derivation of the governing linear and nonlinear parameters, under different boundary conditions of technical interest. In doing so, the efforts are dedicated to the description of the incoming blast waves. In place of simplified sinusoidal pressures, the input impulsive loads are described with the support of infinite trigonometric series that are more accurate. The so-developed SDOF model is therefore validated, based on selected literature results, by analyzing the large displacement response of thin elastic plates, under several boundary conditions and real blast pressures. Major advantage for the validation of the proposed SDOF model is obtained from experimental finite element (FE) and finite difference (FD) models of literature, giving evidence of a rather good correlation and confirming the validity of the presented formulation.

ACS Style

M. D. Goel; T. Thimmesh; P. Shirbhate; C. Bedon. Enhanced Single-Degree-of-Freedom Analysis of Thin Elastic Plates Subjected to Blast Loading Using an Energy-Based Approach. Advances in Civil Engineering 2020, 2020, 1 -29.

AMA Style

M. D. Goel, T. Thimmesh, P. Shirbhate, C. Bedon. Enhanced Single-Degree-of-Freedom Analysis of Thin Elastic Plates Subjected to Blast Loading Using an Energy-Based Approach. Advances in Civil Engineering. 2020; 2020 ():1-29.

Chicago/Turabian Style

M. D. Goel; T. Thimmesh; P. Shirbhate; C. Bedon. 2020. "Enhanced Single-Degree-of-Freedom Analysis of Thin Elastic Plates Subjected to Blast Loading Using an Energy-Based Approach." Advances in Civil Engineering 2020, no. : 1-29.

Conference paper
Published: 02 December 2020 in Materials Today: Proceedings
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Blast doors are specially designed doors for military facilities and important civil buildings in potentially explosive environment. In the present investigation, Finite Element (FE) analysis is carried out to understand the dynamic response of blast door under a given blast loading using ABAQUS/Explicit®. Five different doors configurations with two different materials i.e. AISI 1045 steel and structural steel (ST37) are investigated. Further, effect of consideration of strain rate, on dynamic response of the doors, is investigated using rate dependent Johnson-Cook model. Blast load is applied using ConWep function to understand the dynamic response of blast door in terms of displacement at different locations along with their failure patterns. Based on this investigation, it is observed that central point displacement is significantly influenced by the geometry of door with all other parameters being same. Further, considerations of strain rate show no major effect on the peak displacement for both the materials considered in the present investigation.

ACS Style

T. Thimmesh; P.A. Shirbhate; J. Mandal; I.S. Sandhu; M.D. Goel. Numerical investigation on the blast resistance of a door panel. Materials Today: Proceedings 2020, 44, 659 -666.

AMA Style

T. Thimmesh, P.A. Shirbhate, J. Mandal, I.S. Sandhu, M.D. Goel. Numerical investigation on the blast resistance of a door panel. Materials Today: Proceedings. 2020; 44 ():659-666.

Chicago/Turabian Style

T. Thimmesh; P.A. Shirbhate; J. Mandal; I.S. Sandhu; M.D. Goel. 2020. "Numerical investigation on the blast resistance of a door panel." Materials Today: Proceedings 44, no. : 659-666.

Journal article
Published: 01 December 2020 in Journal of Performance of Constructed Facilities
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Dynamic response of shallow buried tunnel with three different cross sections subjected to surface blast loading using LS-DYNA version R10.1.0 is investigated. Multimaterial arbitrary Lagrangian Eulerian (MM-ALE) is employed for this study. Strain softening of concrete is incorporated in terms of tensile cracking. Whereas, strain rate dependent behavior of reinforcement is defined using visco-plastic formulation. The main objective is to investigate the nonlinear behavior of reinforced concrete that constitutes the tunnel lining under a surface blast. Extensive parametric analysis has been performed to determine the effects of change in explosive charge weight, lining thickness, and cover depth on the behavior of tunnel under blast loading. Further, a comparative study based on the degree of blast resistance has been carried out considering three tunnel cross sections, namely, horseshoe, box, and circular. Finally, the blast damage assessment of tunnel with varying geometry, explosive charge weight, and cover depth has been investigated to arrive at the most vulnerable blast scenario.

ACS Style

Jagriti Mandal; A. K. Agarwal; M. D. Goel. Numerical Modeling of Shallow Buried Tunnel Subject to Surface Blast Loading. Journal of Performance of Constructed Facilities 2020, 34, 04020106 .

AMA Style

Jagriti Mandal, A. K. Agarwal, M. D. Goel. Numerical Modeling of Shallow Buried Tunnel Subject to Surface Blast Loading. Journal of Performance of Constructed Facilities. 2020; 34 (6):04020106.

Chicago/Turabian Style

Jagriti Mandal; A. K. Agarwal; M. D. Goel. 2020. "Numerical Modeling of Shallow Buried Tunnel Subject to Surface Blast Loading." Journal of Performance of Constructed Facilities 34, no. 6: 04020106.

Conference paper
Published: 24 November 2020 in Lecture Notes in Civil Engineering
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Occurrences of terrorist attacks using explosive have frequented in the last two decades. These attacks inflict damage to the structure and ultimately pose threat to the lives of civilians. Public transit systems have been a target of terrorism in the past resulting in casualties and property loss. Indian transit systems consist of underground tunnels mainly to connect locations which otherwise are not easily accessible. Attack on such structures can lead to inaccessibility to isolated places for indefinite period of time. Prevention of such incidents cannot be assured but measures can be adopted to mitigate the damage to these structures. This involves understanding the response of underground structures under various blast scenarios. Thereby, this work presents the response of underground tunnel subjected to surface explosion using multi-material arbitrary Lagrangian Eulerian (MM-ALE) method. The model has been validated by comparing the size of crater formed by explosion with the size calculated using empirical formulae based on the theory of model similarity. Herein, a parametric study has been carried out by varying the TNT charge weight and tunnel lining thickness. Maximum damage is observed in the tunnel with increase in charge weight and decrease in lining thickness. An intervening layer of foam is fitted directly over the tunnel to absorb shock energy generated from detonation. Optimum thickness of foam at which blast damage can effectively be mitigated has been determined by performing numerical simulations.

ACS Style

Jagriti Mandal; M. D. Goel; Ajay Kumar Agarwal. Numerical Modeling of Tunnel Subjected to Surface Blast Loading. Lecture Notes in Civil Engineering 2020, 543 -554.

AMA Style

Jagriti Mandal, M. D. Goel, Ajay Kumar Agarwal. Numerical Modeling of Tunnel Subjected to Surface Blast Loading. Lecture Notes in Civil Engineering. 2020; ():543-554.

Chicago/Turabian Style

Jagriti Mandal; M. D. Goel; Ajay Kumar Agarwal. 2020. "Numerical Modeling of Tunnel Subjected to Surface Blast Loading." Lecture Notes in Civil Engineering , no. : 543-554.

Review
Published: 24 November 2020 in Lecture Notes in Civil Engineering
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In the present scenario, it has been observed that terrorist attack became global issue and due to its increased frequency, it has gained attention of the researchers all over the world. Thus, it became the need of today’s era to understand the basics of explosion and factors affecting the explosion. Types of explosives are one of the important parameters which directly influences the impact of blast on any structural element. The term “TNT equivalence” is considered as the benchmark and is most commonly used to compare the performance of explosives with respect to reference explosive, i.e. trinitrotoluene (TNT). The main purpose of this study is to review TNT equivalence and the factors associated with it. The effect of charge geometry (i.e. spherical, flat, cylindrical, square etc.), confinement (close-in, intermediate or far ranges, etc.) and standoff distance on the peak overpressure and impulse are discussed in the present study as explosive energy and charge mass of the detonating material is related to equivalent weight of TNT. Moreover, effect of scaled distance of high explosives on TNT equivalent is also presented. Further, various numerical methods used to compute the TNT equivalents (TNTe) are reported for improved understanding of the TNT equivalence.

ACS Style

P. A. Shirbhate; M. D. Goel. A Critical Review of TNT Equivalence Factors for Various Explosives. Lecture Notes in Civil Engineering 2020, 471 -478.

AMA Style

P. A. Shirbhate, M. D. Goel. A Critical Review of TNT Equivalence Factors for Various Explosives. Lecture Notes in Civil Engineering. 2020; ():471-478.

Chicago/Turabian Style

P. A. Shirbhate; M. D. Goel. 2020. "A Critical Review of TNT Equivalence Factors for Various Explosives." Lecture Notes in Civil Engineering , no. : 471-478.

Conference paper
Published: 24 November 2020 in Lecture Notes in Civil Engineering
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The terrorist activities throughout the world increasing from last decades that leads to loss of life and property. Tunnels are underground structures used for many purposes and their collapse will lead to complete hectic situation for any nation. Hence, it becomes greatest importance to safeguard such structures under extreme loading conditions such as resulting from explosion. Not as much of research had been reported on underground tunnel subjected to blast loading as compared to other structures. To minimize the loss of human life and property, it is very important to understand the response of underground tunnel under explosion. Herein, numerical investigation of underground tunnel is carried out using FE package ABAQUS/Explicit® (Dassault Systèmes Simulia Corporation. France, 2014 [1]). Complete structure is modeled using CEL (Coupled Eulerian and Lagrangian) volume fraction method as per ABAQUS/Explicit® (Dassault Systèmes Simulia Corporation. France, 2014 [1]). First of all, FE analysis is validated with the available experimental results and then parametric investigation is carried out. Herein, tunnel structure is investigated under varying charge weight for the better understand of dynamic response structure. Further, CFRP (Carbon Fiber Reinforced Polymer) is used as a protective barrier between blast waves and structure to mitigate the structure damage against blast energy. Based on this investigation, it is observed that tunnel structural damage is significantly reduced by employing CFRP as protective barrier.

ACS Style

V. S. Phulari; M. D. Goel. Dynamic Response of Tunnel Under Blast Loading and Its Blast Mitigation Using CFRP as Protective Barrier. Lecture Notes in Civil Engineering 2020, 555 -562.

AMA Style

V. S. Phulari, M. D. Goel. Dynamic Response of Tunnel Under Blast Loading and Its Blast Mitigation Using CFRP as Protective Barrier. Lecture Notes in Civil Engineering. 2020; ():555-562.

Chicago/Turabian Style

V. S. Phulari; M. D. Goel. 2020. "Dynamic Response of Tunnel Under Blast Loading and Its Blast Mitigation Using CFRP as Protective Barrier." Lecture Notes in Civil Engineering , no. : 555-562.

Conference paper
Published: 14 November 2020 in Recent Advances in Computational Mechanics and Simulations
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Numerous road accidents are reported every year amounting to huge loss in lives and properties. This calls for improving the crashworthiness of vehicles which can be achieved by employing lightweight materials with excellent energy absorbing capacity. Thereby, development and characterization of these materials has become need of the hour. In the present investigation, a finite element model of drop weight impact test is developed using LS-DYNA® to study the energy absorption characteristics of aluminum foam reinforced with carbon nanotubes. Herein, hammer is modeled using bilinear material model, and foam is modeled using crushable foam material model. Effect of drop height, density, and foam skin is investigated considering the energy absorption of foam used in this study. The behavior of foam is evaluated in terms of reaction force, displacement–time history, and energy absorption for all the velocities considered herein.

ACS Style

Y. M. Chordiya; M. D. Goel. Low Velocity Impact Behavior of Carbon Nanotubes Reinforced Aluminum Foams. Recent Advances in Computational Mechanics and Simulations 2020, 63 -71.

AMA Style

Y. M. Chordiya, M. D. Goel. Low Velocity Impact Behavior of Carbon Nanotubes Reinforced Aluminum Foams. Recent Advances in Computational Mechanics and Simulations. 2020; ():63-71.

Chicago/Turabian Style

Y. M. Chordiya; M. D. Goel. 2020. "Low Velocity Impact Behavior of Carbon Nanotubes Reinforced Aluminum Foams." Recent Advances in Computational Mechanics and Simulations , no. : 63-71.

Original paper
Published: 25 August 2020 in Indian Geotechnical Journal
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With the recent increase in terrorist attacks on the structures with strategic importance, detailed research intervention is required to study their behaviour under extreme loadings such as loading resulting from blast. Hence, in this investigation, three different cross sections of the tunnel with two different soil mediums are investigated under the blast loading. Herein, 3-dimensional nonlinear finite element analysis of tunnels is carried out using ABAQUS/Explicit®. Stress–strain response of soil, concrete and reinforcement has been simulated using Mohr–Coulomb plasticity, concrete-damaged plasticity and Johnson–Cook plasticity material models, respectively. In this study, FE analysis is carried out to compare the damage of tunnel and surrounding soil under three different cross sections of tunnel, i.e. arched, circular and rectangular, and two soil conditions, i.e. saturated and unsaturated soil. Further, tunnel is analysed for an explosion of 100-kg TNT explosive placed at the centre of the cross section of tunnel. Response of the tunnels in terms of displacement and stress at critical locations is computed for the comparison of the results. Results indicate that the variation in cross-sectional shape and surrounding soil affects the behaviour of tunnel for the same amount of the explosive. It has been also observed that displacement in tunnel lining and soil surface is of smaller magnitude for saturated soil. Also, lower stress is observed for saturated soil for all other conditions being same.

ACS Style

M. D. Goel; Shivani Verma; Sandeep Panchal. Effect of Internal Blast on Tunnel Lining and Surrounding Soil. Indian Geotechnical Journal 2020, 51, 359 -368.

AMA Style

M. D. Goel, Shivani Verma, Sandeep Panchal. Effect of Internal Blast on Tunnel Lining and Surrounding Soil. Indian Geotechnical Journal. 2020; 51 (2):359-368.

Chicago/Turabian Style

M. D. Goel; Shivani Verma; Sandeep Panchal. 2020. "Effect of Internal Blast on Tunnel Lining and Surrounding Soil." Indian Geotechnical Journal 51, no. 2: 359-368.

Conference paper
Published: 10 January 2020 in Recent Advances in Computational Mechanics and Simulations
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Drop weight impact is the preferable choice for studying the impact behavior of material due to its low to medium strain rates of loading. So, herein, a finite element model is developed using LS-DYNA® for numerical simulation of drop weight test. For this investigation, closed-cell aluminum foam (Alulight foam) is used for test simulation. These foams are available with and without skin and in the present investigation, foam with skin is analyzed. Three different impact velocities are used to consider the effect of impact velocities and skin on impact behavior for the foam considered herein. In the present study, material model used for hammer and skin is plastic kinematic, and Deshpande–Fleck material model is used to model the aluminum foam. Based on the developed FE-model, energy absorption by each drop impact test is calculated using the force–displacement relation for the impact velocities considered in the present study.

ACS Style

Y. M. Chordiya; M. D. Goel. Low Velocity Impact Behavior of Closed-Cell Aluminum Foam Considering Effect of Foam Skin. Recent Advances in Computational Mechanics and Simulations 2020, 143 -149.

AMA Style

Y. M. Chordiya, M. D. Goel. Low Velocity Impact Behavior of Closed-Cell Aluminum Foam Considering Effect of Foam Skin. Recent Advances in Computational Mechanics and Simulations. 2020; ():143-149.

Chicago/Turabian Style

Y. M. Chordiya; M. D. Goel. 2020. "Low Velocity Impact Behavior of Closed-Cell Aluminum Foam Considering Effect of Foam Skin." Recent Advances in Computational Mechanics and Simulations , no. : 143-149.

Conference paper
Published: 26 November 2019 in Materials Today: Proceedings
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Free fall drop weight impact testing is an optimum option for studying the impact behavior of various materials under low to medium strain rates because of its applicability in these ranges of strain rates. Herein, drop weight impact test is simulated using non-linear finite element code LS-DYNA®. The material, considered herein for test simulation, is aluminum cenosphere syntactic foam. Three different impact velocities with three different foam models, available in LS-DYNA®, are used to understand the effect of impact velocities and material model on the impact behavior of the considered foam. In the present study, FE model is developed using LS-DYNA® for drop weight impact test wherein, a bilinear material model is used for hammer and three material models i.e. crushable foam, Deshpande-Fleck foam, piecewise linear plasticity are used to model the foam. Based on simulation, force-displacement relation is developed for studying the energy absorption under varying impact velocities and foam models.

ACS Style

Yash Chordiya; M.D. Goel. Low Velocity Impact Behavior of Aluminum Cenosphere Syntactic Foam. Materials Today: Proceedings 2019, 18, 3741 -3748.

AMA Style

Yash Chordiya, M.D. Goel. Low Velocity Impact Behavior of Aluminum Cenosphere Syntactic Foam. Materials Today: Proceedings. 2019; 18 ():3741-3748.

Chicago/Turabian Style

Yash Chordiya; M.D. Goel. 2019. "Low Velocity Impact Behavior of Aluminum Cenosphere Syntactic Foam." Materials Today: Proceedings 18, no. : 3741-3748.

Article
Published: 01 August 2019 in Journal of Materials Engineering and Performance
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Deformation of metal foams under high rate of loading is a complex phenomenon due to the effects of various parameters involved therein. In the present investigation, cenosphere-filled aluminum alloy syntactic foam is studied under high rate of loading in comparison with their quasi-static behavior. The experiments, for high strain rates, are carried out using split Hopkinson pressure bar and full stress–strain curves of foam are developed under such rate of loadings. Foams with three different cenosphere sizes at three different high rates of loadings are investigated for their mechanical behavior. Compressive behavior and energy absorption capacity are reported considering the effect of high loading rates and cenosphere sizes. It is observed that, increase in loading rate results in higher strength of foams by an amount of 16-32%. Further, it is observed that energy absorption is improved with the increase in strain rates and cenosphere sizes and this improvement is observed in the range of 80-182%. Based on deformation modes and failure damage study, using SEM microstructure, deformation mechanism is observed to be almost independent of strain rate increment particularly at higher strain rates considered in this investigation. Moreover, there exists a limiting value of strain rate beyond which there is an insignificant increase in compressive strength of foams considered in the present investigation.

ACS Style

M. D. Goel; Venkitanarayanan Parameswaran; D. P. Mondal. High Strain Rate Response of Cenosphere-Filled Aluminum Alloy Syntactic Foam. Journal of Materials Engineering and Performance 2019, 28, 4731 -4739.

AMA Style

M. D. Goel, Venkitanarayanan Parameswaran, D. P. Mondal. High Strain Rate Response of Cenosphere-Filled Aluminum Alloy Syntactic Foam. Journal of Materials Engineering and Performance. 2019; 28 (8):4731-4739.

Chicago/Turabian Style

M. D. Goel; Venkitanarayanan Parameswaran; D. P. Mondal. 2019. "High Strain Rate Response of Cenosphere-Filled Aluminum Alloy Syntactic Foam." Journal of Materials Engineering and Performance 28, no. 8: 4731-4739.

Conference paper
Published: 31 July 2019 in Proceedings of the 2nd Annual International Conference on Material, Machines and Methods for Sustainable Development (MMMS2020)
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Due to increased frequency of terrorist attacks and blast threats all over the world, safety of personnel and structural integrity under blast loading is most important. This necessitates immediate research intervention to understand the behavior of various structures and structural components under such extreme loadings. In the present investigation, non-linear dynamic finite element (FE) analysis of sacrificial curved steel wall is carried out with varying angle of curvature (i.e. 0°–180°). Herein, non-linear dynamic analysis is carried out using ABAQUS ® finite element package. ConWep formulation is used for defining blast loading and performance of the wall, in terms of peak deflection, is compared to understand the effect on curvature on peak deflection. For this purpose, three-dimensional deformable 4-node, reduced integration, hourglass control with finite membrane strains elements are employed for non-linear FE analysis of curved wall. Non-linear dynamic analysis is carried out with varying angle of curvature along top one-fourth length of the wall. Further, performance of curved walls is compared with that of straight vertical wall in terms of peak deflection. Deflection at various points along the height of wall is computed and analyzed. Based on this analysis, it is observed that a simple change in curvature of wall results in considerable improvement in blast resistance with all other conditions being same.

ACS Style

P. Sreekanth; M. D. Goel. Dynamic Response of Sacrificial Curved Steel Wall Under Blast Loading. Proceedings of the 2nd Annual International Conference on Material, Machines and Methods for Sustainable Development (MMMS2020) 2019, 457 -465.

AMA Style

P. Sreekanth, M. D. Goel. Dynamic Response of Sacrificial Curved Steel Wall Under Blast Loading. Proceedings of the 2nd Annual International Conference on Material, Machines and Methods for Sustainable Development (MMMS2020). 2019; ():457-465.

Chicago/Turabian Style

P. Sreekanth; M. D. Goel. 2019. "Dynamic Response of Sacrificial Curved Steel Wall Under Blast Loading." Proceedings of the 2nd Annual International Conference on Material, Machines and Methods for Sustainable Development (MMMS2020) , no. : 457-465.

Journal article
Published: 01 January 2019 in International Journal of Structural Glass and Advanced Materials Research
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Accidents are misfortune which could happen to anyone at any place at any time and it affects the vehicle as well as the occupants. Continuous research is being carried out for improving the crashworthiness of the vehicles with different materials. These materials plays important aspect in energy absorption and impact resistant design of the structure, wherein, presence of these materials highly affects the response of structures subjected to impact loading. In the present study, a non-linear finite element code LS-DYNA® is used for numerical simulation of drop weight impact hammer test. The material chosen for simulated testing is polymeric syntactic foam. In this study, effect of density of foam, foam material model, effect of drop height and effect of tube, filled with foam, on energy absorption of foam is studied. Herein, material model chosen for hammer is bilinear material model and crushable foam as well as piecewise linear plasticity model is used to model the foam. Behaviour of foam is compared in terms of reaction force, displacement time history and force-displacement variation. Energy absorption for each model is computed for different velocities considered in the present study and it is observed that tube plays an important role in enhancing the energy absorption of foam.

ACS Style

Yash M. Chordiya; Manmohan Dass Goel. Drop Weight Impact Behaviour of Tube Filled Polymeric Syntactic Foam. International Journal of Structural Glass and Advanced Materials Research 2019, 3, 40 -55.

AMA Style

Yash M. Chordiya, Manmohan Dass Goel. Drop Weight Impact Behaviour of Tube Filled Polymeric Syntactic Foam. International Journal of Structural Glass and Advanced Materials Research. 2019; 3 (1):40-55.

Chicago/Turabian Style

Yash M. Chordiya; Manmohan Dass Goel. 2019. "Drop Weight Impact Behaviour of Tube Filled Polymeric Syntactic Foam." International Journal of Structural Glass and Advanced Materials Research 3, no. 1: 40-55.

Conference paper
Published: 01 January 2018 in Materials Today: Proceedings
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ACS Style

Sonika Sahu; Dehi Pada Mondal; Manmohan Dass Goel; Mohd. Zahid Ansari. Finite element analysis of AA1100 elasto-plastic behaviour using Johnson-Cook model. Materials Today: Proceedings 2018, 5, 5349 -5353.

AMA Style

Sonika Sahu, Dehi Pada Mondal, Manmohan Dass Goel, Mohd. Zahid Ansari. Finite element analysis of AA1100 elasto-plastic behaviour using Johnson-Cook model. Materials Today: Proceedings. 2018; 5 (2):5349-5353.

Chicago/Turabian Style

Sonika Sahu; Dehi Pada Mondal; Manmohan Dass Goel; Mohd. Zahid Ansari. 2018. "Finite element analysis of AA1100 elasto-plastic behaviour using Johnson-Cook model." Materials Today: Proceedings 5, no. 2: 5349-5353.

Technical paper
Published: 21 November 2017 in Transactions of the Indian Institute of Metals
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In order to examine the effect of microballoons type on microstructure and compressive deformation behaviour of aluminum syntactic foam, alumina reinforced and cenosphere reinforced aluminum syntactic foams have been made through stir-casting technique. Alumina microballoons reinforced aluminum syntactic foam (AMRASF) has been developed using stir casting technique. Volume fraction of alumina microballoons in AMRASF varies in the range of 0.39–0.74. The compressive deformation behavior of these AMRASF is compared with that of cenosphere reinforced aluminum syntactic foam (CPRASF). The AMRASF does not exhibit clear plastic collapse stage as observed in case of CPRSAF. It is further noted that AMRASF shows the existence of work hardening phenomena after yielding but CPRASF does not show any significant work hardening after yielding even at higher relative densities of foam. This is explained on the basis of characteristics of alumina microballoons and cenospheres and interface characteristics between matrix and respective microballoons used. Effect of individual microballoons’ characteristics on the foam properties has also been explained.

ACS Style

Dehi Pada Mondal; Manmohan Dass Goel; Vartika Upadhyay; Satyabrat Das; Mulayam Singh; Ajay Kumar Barnwal. Comparative Study on Microstructural Characteristics and Compression Deformation Behaviour of Alumina and Cenosphere Reinforced Aluminum Syntactic Foam Made Through Stir Casting Technique. Transactions of the Indian Institute of Metals 2017, 71, 567 -577.

AMA Style

Dehi Pada Mondal, Manmohan Dass Goel, Vartika Upadhyay, Satyabrat Das, Mulayam Singh, Ajay Kumar Barnwal. Comparative Study on Microstructural Characteristics and Compression Deformation Behaviour of Alumina and Cenosphere Reinforced Aluminum Syntactic Foam Made Through Stir Casting Technique. Transactions of the Indian Institute of Metals. 2017; 71 (3):567-577.

Chicago/Turabian Style

Dehi Pada Mondal; Manmohan Dass Goel; Vartika Upadhyay; Satyabrat Das; Mulayam Singh; Ajay Kumar Barnwal. 2017. "Comparative Study on Microstructural Characteristics and Compression Deformation Behaviour of Alumina and Cenosphere Reinforced Aluminum Syntactic Foam Made Through Stir Casting Technique." Transactions of the Indian Institute of Metals 71, no. 3: 567-577.

Article
Published: 04 August 2016 in Sādhanā
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Herein, a detailed review of the past studies carried out on crushing and energy absorption behaviour of hollow and foam filled tubes under axial compression is presented. Importance of such investigation is discussed for understanding the research need and to develop suitable alternatives. The focus of review is the deformation mechanism and energy absorption of hollow circular and square tubes, foam filled circular and square tubes notably. Comprehensive review on the various deformation modes for these tubes under axial impact load and effect of foam filling is presented. The review includes the various parameters affecting the peak load and energy absorption. Although various other forms of energy absorbing materials and structures exist such as composites, multi-wall tubes and honeycombs, these are not within the scope of present review. This paper intends to provide assistance in design and development of empty and foam filled tubes as effective energy absorbers. Further, this paper provides the necessary information for designers to understand the deformation of such tubes.

ACS Style

Aparna Pandarkar; Manmohan Dass Goel; Manjeet Singh Hora. Axial crushing of hollow and foam filled tubes: An overview. Sādhanā 2016, 41, 909 -921.

AMA Style

Aparna Pandarkar, Manmohan Dass Goel, Manjeet Singh Hora. Axial crushing of hollow and foam filled tubes: An overview. Sādhanā. 2016; 41 (8):909-921.

Chicago/Turabian Style

Aparna Pandarkar; Manmohan Dass Goel; Manjeet Singh Hora. 2016. "Axial crushing of hollow and foam filled tubes: An overview." Sādhanā 41, no. 8: 909-921.