TY - JOUR
T1 - Image-based finite element analysis of porous aluminum and its accuracy examination
AU - Kuwazuru, Osamu
AU - Utsunomiya, Takao
AU - Hangai, Yoshihiko
AU - Myojo, Takuya
N1 - Publisher Copyright:
© 2014 The Japan Institute of Light Metals
PY - 2014
Y1 - 2014
N2 - Porous aluminum can be a good shock absorber, and its collapse behavior and shock absorbing property is desired to be optimized by the pore structure. To unravel the collapse mechanism, we have utilized the image-based finite element analysis. The pore structure was captured by the micro-focus X-ray computed tomography, and the finite element model was automatically and easily generated by using the uniform cubic element, that is, voxel element. The elastic property of two samples of porous aluminum was evaluated by the finite element analysis, and compared with the experimental result of static compression test. The effect of element size on the elastic numerical results was also investigated by changing the size of voxel element. However, the elastic property obtained by the finite element analysis completely differed from the initial gradient of the stress-strain curve obtained by the experiment. On the other hand, the elastic-plastic analysis gives a good estimation of the initial gradient of the stress-strain curve. We concluded that the compressive collapse behavior was affected by the elastic-plastic property of material along with the high stress concentration from the beginning of contact with the compression plate and the plateau region was realized by the finite deformation of the cell walls.
AB - Porous aluminum can be a good shock absorber, and its collapse behavior and shock absorbing property is desired to be optimized by the pore structure. To unravel the collapse mechanism, we have utilized the image-based finite element analysis. The pore structure was captured by the micro-focus X-ray computed tomography, and the finite element model was automatically and easily generated by using the uniform cubic element, that is, voxel element. The elastic property of two samples of porous aluminum was evaluated by the finite element analysis, and compared with the experimental result of static compression test. The effect of element size on the elastic numerical results was also investigated by changing the size of voxel element. However, the elastic property obtained by the finite element analysis completely differed from the initial gradient of the stress-strain curve obtained by the experiment. On the other hand, the elastic-plastic analysis gives a good estimation of the initial gradient of the stress-strain curve. We concluded that the compressive collapse behavior was affected by the elastic-plastic property of material along with the high stress concentration from the beginning of contact with the compression plate and the plateau region was realized by the finite deformation of the cell walls.
KW - Finite element method
KW - Functional materials
KW - Image-based analysis
KW - Pore structure
KW - Porous metals
KW - Stress concentration
KW - X-ray computed tomography
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U2 - 10.2464/jilm.64.551
DO - 10.2464/jilm.64.551
M3 - Article
AN - SCOPUS:84920135015
VL - 64
SP - 551
EP - 556
JO - Keikinzoku/Journal of Japan Institute of Light Metals
JF - Keikinzoku/Journal of Japan Institute of Light Metals
SN - 0451-5994
IS - 11
ER -