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TECHNICAL PAPERS

Fluid and Matrix Components of Polyurethane Foam Behavior Under Cyclic Compression

[+] Author and Article Information
Jackie D. Rehkopf, Greg M. McNeice, G. Wayne Brodland

Department of Civil Engineering, University of Waterloo, Waterloo, Ontario, Canada, N2L 3G1

J. Eng. Mater. Technol 118(1), 58-62 (Jan 01, 1996) (5 pages) doi:10.1115/1.2805934 History: Received August 06, 1994; Revised January 13, 1995; Online November 27, 2007

Abstract

Semi-rigid polyurethane foam specimens were compressed to 25, 50, or 75 percent strain at nominal strain rates of 0.14/s, 1.4/s or 14/s for up to 100 cycles. The loads carried by the fluid and matrix phases of the foam were determined over these deformation histories using an experimental method recently developed by the authors. The fluid phase contributed significantly to the first-cycle stress of specimens compressed to 50 or 75 percent strain. During subsequent cycles, the fluid component decreased more quickly than the matrix component and became negligible by 100 cycles.

Copyright © 1996 by The American Society of Mechanical Engineers
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