Simulation Analysis of Effect of Porosity on Compression Behavior and Energy Absorption Properties of Aluminum Foam Sandwich Panels

Abstract

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.

Study on the compression energy absorption characteristics of 3D printed PLA and PLA-Cu materials

“…Figure 4. Comparison of energy absorption curvesMany references[9][10][11][12][13] show that the compressive yield stress of aluminum foam is within 20 MPa, and the energy absorption per unit volume does not exceed 30 MJ / mm 3 , as shown in Figure4 (b). Therefore, the energy absorption per unit volume of PLA and PLA-Cu materials is much higher than that of aluminum foam materials, indicating that PLA and PLA-Cu materials can replace aluminum foam materials in some applications.…”