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TECHNICAL PAPERS

Thermodynamic Law of Corresponding Shock States in Flexible Polymeric Foams

[+] Author and Article Information
E. Zaretsky, G. Ben-Dor

Pearlstone Center for Aeronautical Engineering Studies, Department of Mechanical Engineering, Ben-Gurion University of the Negev, Beer Sheva, Israel

J. Eng. Mater. Technol 118(4), 493-502 (Oct 01, 1996) (10 pages) doi:10.1115/1.2805947 History: Received November 19, 1995; Revised March 17, 1996; Online November 27, 2007

Abstract

Based on thermodynamic considerations and experimental data on isothermal compression of elastomeric foams, a simple equation of state of flexible polymeric foams was developed. The developed equation of state is, in fact, a simple universal function relating the thermodynamic properties of the material of which the skeleton of the foam is made and the foam porosity. It was shown that the Hugoniot adiabat of foams, whose porosity is less than 0.3 and which are exposed to moderate shocks, could be expressed in a form similar to that of bulk solids, i.e., D = Co + Su, where D is the shock front velocity, Co is the speed of sound, u is the particle velocity and S is the maximum material compressibility.

Copyright © 1996 by The American Society of Mechanical Engineers
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