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Based on its structural features, Aluminum Foam Sandwich (AFS) panels were properly simplified to two-dimensional random models through C++ and ANSYS software in this paper. The apparent elastic property of AFS panels was studied through simulation under the circumstances of different relative density, pore size range or geometric imperfections. The obtained results showed that the microstructural deformation in AFS was caused during uniaxial compression, which leaded to the increase of apparent elastic modulus with the increase of relative density. It was also found that the apparent elastic modulus of AFS panels with non-homogeneous structure was the highest and the apparent elastic modulus of AFS panels with geometric imperfections was the lowest. Moreover, the pore size range almost had no effect on the slope of the elastic stage. However, the apparent elastic modulus showed great sensitivity to the geometric imperfections. In addition, the exponential relationship between the relative densities and the relative elastic modulus was fitted. The simulation results in this work were in agreement with those found in previous theoretical and experimental results reported in other literature, which confirmed the feasibility and rationality of two-dimensional random models.

According to the microstructure characteristics of sandwich (AFS) panels, two-dimensional random models of AFS panels with different porosities were created by C++ and ANSYS/LS-DYNA software in this paper. The main purpose of the current paper is investigating and analyzing the effects of porosity on the compression behaviors and energy absorption capacities of AFS panels under the same compressive loading on base of established random models. It was found that there were obvious three stages in the stress-strain curves of AFS panels, namely elastic region, collapse region and densification region. In addition, the results also confirmed that porosity had apparent effect on the compressive capacities and energy absorption capacities of AFS panels. Furthermore, through comparison and analysis, the simulation results in this work were basically consistent with the previous theoretical results and experimental results.