Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Discrete element modeling of metal skinned sandwich composite panels subject to uniform load
AU - Zha, Xiaoxiong
AU - Wan, Chengyong
AU - Fan, Yong
AU - Ye, Jianqiao
PY - 2013/3/1
Y1 - 2013/3/1
N2 - This paper presents a numerical approach using the discrete element method (DEM) to simulate failure modes of metal skinned sandwich panels subjected to uniform pressure. The panels were modeled by assemblies of small size particles that interact with each other through contacts. Different constitutive laws are introduced for the contacts to represent the stiffness and strength characteristics of the metal panels and the core materials. Parametric studies are conducted first to assess the influence of particle radius and friction coefficient on the numerical predictions. The model is then used to predict the mechanical behavior of four sandwich panels with different geometry. The panels are also tested in the laboratory and the test results are compared with the predictions. The comparisons suggest that the DEM model can be used as an alternative tool to predict stiffness and strength of sandwich composites. Moreover the approach can predict detailed local damage and failure modes, which is an advantage over the conventional numerical methods, such as the finite element method.
AB - This paper presents a numerical approach using the discrete element method (DEM) to simulate failure modes of metal skinned sandwich panels subjected to uniform pressure. The panels were modeled by assemblies of small size particles that interact with each other through contacts. Different constitutive laws are introduced for the contacts to represent the stiffness and strength characteristics of the metal panels and the core materials. Parametric studies are conducted first to assess the influence of particle radius and friction coefficient on the numerical predictions. The model is then used to predict the mechanical behavior of four sandwich panels with different geometry. The panels are also tested in the laboratory and the test results are compared with the predictions. The comparisons suggest that the DEM model can be used as an alternative tool to predict stiffness and strength of sandwich composites. Moreover the approach can predict detailed local damage and failure modes, which is an advantage over the conventional numerical methods, such as the finite element method.
KW - Discrete element
KW - Metal skinned sandwich panel
KW - Load bearing capacity
KW - Failure mode
U2 - 10.1016/j.commatsci.2012.11.015
DO - 10.1016/j.commatsci.2012.11.015
M3 - Journal article
VL - 69
SP - 73
EP - 80
JO - Computational Materials Science
JF - Computational Materials Science
SN - 0927-0256
ER -