Numerical simulation of drop weight impact behaviour of closed cell aluminium foam

Rajendran, R.; Moorthi, A.; Basu, S.

doi:10.1016/j.matdes.2009.01.026

Cited by 31 publications

(13 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar bells have also been observed in other experimental and numerical studies on the impact behaviour of closedcell foams. In some cases, the stress-time curve only consisted of a single bell (Rajendran et al, 2009), while in some cases there was a double bell in the curves, although the span of the first bell was usually very tiny compared to the span of the second bell (Li et al, 2012;Castro et al, 2013;Peroni et al, 2013). The presence of the first bell in the curves can be due to reduction in the stress level in the top face of the specimen after the initial increase in the stress level after the occurrence of the impact.…”

Section: Discussionmentioning

confidence: 99%

Low-velocity impact behaviour of open-cell foams

Hedayati

Sadighi

2018

jtam

View full text Add to dashboard Cite

Metal foams are cellular solids that show some unique properties which cannot be found in other natural or human-made materials. While the impact characteristics of closed-cell foams under static and impact loadings appear to be well-studied in the literature, the impact behaviour of open-cell foams is not yet well-understood. In this study, open-cell foams with two different densities are impacted by drop weights with different kinetic energies. The effects of foam density, impactor initial height, and impactor weight on the recorded stresstime, stress-strain, and energy-strain curves are investigated. While the stress-strain curve of closed-cell foams under impact loading usually consists of a single bell, the results of the current study showed that both the stress-time and stress-strain curves of most the samples consist of two consecutive bells. By increasing weight of the impacting weight, the number of bells increases which helps in increasing the impact period and keeping the maximum generated stress low. Compared to closed-cell foams, the open-cell foams can therefore better absorb the energy, as long as the impact energy is relatively small. The relatively low stiffness as well as the presence of large hollow space inside the open-cell foams also makes them favorable for being used as biomedical scaffolds.

show abstract

Section: Discussionmentioning

confidence: 99%

Low-velocity impact behaviour of open-cell foams

Hedayati

Sadighi

2018

jtam

View full text Add to dashboard Cite

show abstract

“…In ABAQUS, the crushable foam material model is based on the theory developed by Deshpande and Fleck for isotropic hardening materials [24,25] and has been used in [15,[26][27][28][29][30][31] for modeling the material behavior of foams in ABAQUS package. This material model is also used in [14,[32][33][34] for modeling the mechanical behavior of foams in LS-DYNA FE package. The yield surface for volumetric hardening model is [25] …”

Section: Macro-scale Modelmentioning

confidence: 99%

“…Using a crushable foam material model, Rajendran et al [14] simulated the low-velocity impact on closed-cell foams with different densities. Li et al [15] imposed quasi-static and low-velocity impact loadings on closed-cell aluminum foams and compared analytical, numerical, and experimental results.…”

Section: Introductionmentioning

confidence: 99%

CT-Based Micro-Mechanical Approach to Predict Response of Closed-Cell Porous Biomaterials to Low-Velocity Impact

et al. 2018

View full text Add to dashboard Cite

Abstract:In this study, a new numerical approach based on CT-scan images and finite element (FE) method has been used to predict the mechanical behavior of closed-cell foams under impact loading. Micro-structural FE models based on CT-scan images of foam specimens (elastic-plastic material model with material constants of bulk aluminum) and macro-mechanical FE models (with crushable foam material model with material constants of foams) were constructed. Several experimental tests were also conducted to see which of the two noted (micro-or macro-) mechanical FE models can better predict the deformation and force-displacement curves of foams. Compared to the macro-structural models, the results of the micro-structural models were much closer to the corresponding experimental results. This can be explained by the fact that the micro-structural models are able to take into account the interaction of stress waves with cell walls and the complex pathways the stress waves have to go through, while the macro-structural models do not have such capabilities. Despite their high demand for computational resources, using micro-scale FE models is very beneficial when one needs to understand the failure mechanisms acting in the micro-structure of a foam in order to modify or diminish them.

show abstract

“…Further, these foams find their application in safety guards, packaging, automobiles, blast lining materials and helmets. These foams are also used in under water application i.e., they are used for insulation of pipelines, construction of Remotely Or Human-Operated Vehicle (ROV or HOV) and control surface of submarine (Barr and Bouamrata, 1988;Bowles, 1988;Rajendran et al, 2009;Gupta et al, 2013;Pinnoji et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Drop Weight Impact Behaviour of Tube Filled Polymeric Syntactic Foam

Chordiya¹,

Goel²

2019

International Journal of Structural Glass and Advanced Material

View full text Add to dashboard Cite

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 forcedisplacement 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.

show abstract

Numerical simulation of drop weight impact behaviour of closed cell aluminium foam

Cited by 31 publications

References 9 publications

Low-velocity impact behaviour of open-cell foams

Low-velocity impact behaviour of open-cell foams

CT-Based Micro-Mechanical Approach to Predict Response of Closed-Cell Porous Biomaterials to Low-Velocity Impact

Drop Weight Impact Behaviour of Tube Filled Polymeric Syntactic Foam

Contact Info

Product

Resources

About