Publisher : The Korean Society for Composite Materials
DOI : 10.7234/composres.2016.29.3.091
Title & Authors
A Constitutive Equation with Impulse-Momentum Theory for the Expanded Polypropylene Kim, Byeong Kil; Cho, Jae Ung; Jeong, Kwang Young; Kim, Nam Hoon; Oh, Bum S.; Hahn, Youngwon; Cheon, Seong S.;
In this paper, impulse-momentum theory was coupled to a constitutive equation both for implementing quasi-static and impact characteristics of EPP (Expanded polypropylene). Also, parameters which have physical meanings were expressed as functions of relative density. Simultaneous nonlinear Newton-Raphson method was applied to find the proper values for parameters in the constitutive equation along with quasi-static test data. Results from the impulse-momentum theory coupled constitutive equation showed good agreement with experimental data and the potential to be applied to different material type polymeric foam.
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