Study on the Yield Behavior of Closed-Cell Foams under Multiaxial Loads Based on Different Yield Definitions

In this paper, the yield behavior of closed-cell foams under multiaxial load conditions is investigated via finite element analysis on representative volume (RVE) scale by using regular Kelvin RVE and random models RVE, respectively. Several different definitions are considered in study. By benchmarking simulations with experimental data literature, it shown that elastic energy criterion to be suitable for definition point stress states. Based micro-scale energy, which can readily obtained numerical simulation, a general proposed determine foam materials at macroscopic scales. To test adaptability definition, we analyze multiple relative densities inner structures. The results indicate method used models, even applied continuum materials.