Development of a Macroscopic Yield Function for Polymeric Foams
Document Number: 2004-01-0465
Date Published: March 2004
Author(s):
D. A. Wang - Univ. of Michigan
Jwo Pan - Univ. of Michigan-Ann Arbor
Abstract:
A macroscopic yield function is proposed here to characterize a polymeric foam under a full range of loading conditions. The principal stresses of a stress tensor and the second invariant of the deviatoric stress tensor are the main parameters in the yield function. The yield function is expressed in terms of a linear combination of non-quadratic functions of the relative principal stresses and the second invariant of the deviatoric stress tensor. The non-quadratic yield function can be used to describe the yield behavior of a polymeric foam in Deshpande and Fleck under a full range of loading conditions. A comparison of different macroscopic yield functions to describe the yield behavior of the foam is also presented.
File Size: 247K
Product Status: In Stock
See other papers presented at SAE 2004 World Congress & Exhibition, March 2004, Detroit, MI, USA, Session: Plastic Foams for Automotive Applications
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