The strain rate effect of an open cell aluminum foam

2005 ◽  
Vol 36 (3) ◽  
pp. 645-650 ◽  
Author(s):  
Fusheng Han ◽  
Hefa Cheng ◽  
Qiang Wang ◽  
Zhibin Li
Keyword(s):  
Strain Rate ◽  
Aluminum Foam ◽  
Strain Rate Effect ◽  
Rate Effect ◽  
Open Cell

Dynamic Failure Analysis of Aluminum Foam Sandwich Structure Using 3D Material Point Method

2008 ◽  
Vol 41-42 ◽  
pp. 363-367
Author(s):  
Can Wang ◽  
Hao Ran Chen ◽  
Xiao Zhi Hu ◽  
Yu Xin Wang
Keyword(s):  
Strain Rate ◽  
Sandwich Structure ◽  
Aluminum Foam ◽  
Material Point Method ◽  
Material Point ◽  
Strain Rate Effect ◽  
Rate Effect ◽  
Point Method ◽  
Dynamic Failure ◽  
Load Distributions

The blast-resistant of an aluminum foam sandwich structure under impact has been investigated. Plastic deformation and load distributions in each of the sub-layers during and after impact were calculated by the material point method with the consideration of strain rate effect on deformation of the aluminum foam. The numerical results from the 3D material point method modeling show that the blast-resistant capability of the aluminum foam sandwich structure is excellent, and the energy absorbability of the structure would be underestimated if the strain rate effect on the aluminum foam is ignored.

Research on Dynamic Compression-Shear Behavior of Closed-Cell Aluminum Foam

2013 ◽  
Vol 423-426 ◽  
pp. 1648-1654
Author(s):  
Jiang Ren Lu ◽  
Jian Zhang ◽  
Xin Li Sun ◽  
Xing Hui Cai
Keyword(s):  
Shear Band ◽  
Strain Rate ◽  
Aluminum Foam ◽  
Dynamic Compression ◽  
Shear Loading ◽  
Strain Rate Effect ◽  
Rate Effect ◽  
High Porosity ◽  
Finite Element Software ◽  
Closed Cell

In this paper, the dynamic compression-shear experiments on the closed-cell aluminum foam with porosity of 72%-92% are carried out by using improved split Hopkinson pressure bar. A high speed camera is used to observe the dynamic deformation behavior of the samples on the compression-shear loading. A finite element software ABAQUS is employed to simulate the dynamic compression-shear process of closed-cell aluminum foam. The results demonstrate that there is a compression-shear band on the samples during the compression-shear loading. The most severely damaged area of the material is on the compression-shear band; Low-porosity closed-cell aluminum foam has significant strain rate effect, however high-porosity closed-cell aluminum foam can ignore the strain rate effect. The yield stress of samples decreases with increasing samples angle, whereas shear stress increase with increasing samples angle, and also the corresponding time when the samples just begin to yield decreases with increasing samples angle.

Study of the Strain Rate Effect on Cold-Reduced Carbon Steel and Aluminium Alloy with Numerical Simulations

2006 ◽  
Vol 532-533 ◽  
pp. 973-976
Author(s):  
Lin Wang ◽  
Tai Chiu Lee ◽  
Luen Chow Chan
Keyword(s):  
Carbon Steel ◽  
Strain Rate ◽  
Strain Path ◽  
Plastic Material ◽  
Strain Rate Effect ◽  
Rate Effect ◽  
Forming Process ◽  
Risk Area ◽  
Sensitive Material ◽  
Simulation Results

In this paper, the effect of strain rate has been considered in the simulation of forming process with a simple form combined into the material law. Quite a few researchers have proposed various hardening laws and strain rate functions to describe the material tensile curve. In this study, the strain rate model Cowper-Symonds is used with anisotropic elasto-plastic material law in the simulation process. The strain path evolution of certain elements, when the strain rate is considered and not, is compared. Two sheet materials, Cold-reduced Carbon Steel (SPCC) JIS G3141 and Aluminum alloy 6112 are used in this study. Two yield criteria, Hill 48 and Hill 90, are applied respectively to improve the accuracy of simulation result. They show different performance when strain rate effect is considered. Strain path of the elements in the fracture risk area of SPCC (JIS G3141) varies much when the strain rate material law is used. There is only little difference of the strain distribution of Al 6112 when the strain rate effect is included and excluded in the material law. The simulation results of material SPCC under two conditions indicate that the strain rate should be considered if the material is the rate-sensitive material, which provides more accurate simulation results.

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