Comparison of Different Material Models in Simulating Compression and Energy Absorption of Bumper Foam During Low Speed Impact

Abstract

In this paper an analytical modeling of foam material using four different formulations is considered. Four material models considered here (MATERIAL LAWS 10, 21, 28 and 35) are available in RADIOSS (commercial non-linear finite element analysis code). All four models are used in simulating the deformation of structures consisting of foam components. Static compression test data, on foam cube samples of different densities, are first validated to arrive at the material parameters required as input to RADIOSS. Then, an application of foam material in an energy absorbing front bumper structure is studied. Comparison of these material models in low speed impact testing is carried out. Based upon the experience gained on material modeling of foam. Material Law 10 or 28 (preferably 28) is recommended to simulate low speed impact testing.