Constitutive Modeling and Simulation of Energy Absorbing Polyurethane Foam Under Impact Loading

by James A. Sherwood, Univ of New Hampshire, Durham, United States,
Colin C. Frost, Univ of New Hampshire, Durham, United States,



Document Type: Proceeding Paper

Part of: Engineering Mechanics

Abstract:

The compressive-stress strain response of polyurethane foam under uniaxial compressive impact loading has been studied. The development of a uniaxial constitutive model from strain rate controlled compression tests is detailed. Density and temperature functions have been added to the integral power model proposed by Schwaber, Meincke and Nagy. The model assumes that the effects of density, temperature, strain and strain rate on stress are separable functions. The model correlated well with actual static compression tests and was used successfully to predict the impact response of EA polyurethane foam under uniaxial compressive loading.

Subject Headings: Strain | Synthetic materials | Impact loads | Compression tests | Stress strain relations | Strain rates | Polyurethane

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