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Technical Paper

FE Analysis of a Partially Trimmed Vehicle using Poroelastic Finite Elements Based on Biot's Theory

2007-05-15
2007-01-2330
A poroelastic material can be represented as a material that is constituted by two phases: a structural phase given by a solid frame, and a fluid phase given by the air that fills the pores of the solid frame itself. In the mid frequency range, the physical behavior of both phases and their interactions need to be properly modeled in order to predict accurately the dynamic behavior of the porous material. This can be done using finite elements based on Biot's theory, which describes the macroscopic behavior of poroelastic materials by characterizing them through a set of parameters directly measured on material samples. In this paper, numerical/experimental correlations obtained using two commercial software programs that implement libraries of poroelastic materials are presented. A free-free steel plate covered by a 20mm thick layer of foam and a massive heavy layer has been selected as a first test case.
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