The Thermal Diffusivity of Highly-Filled Rubber

[+] Author and Article Information
R. A. Schapery, R. E. Martin

Texas A&M University, College Station, Texas

J. Heat Transfer 96(2), 225-231 (May 01, 1974) (7 pages) doi:10.1115/1.3450169 History: Received July 30, 1973; Online August 11, 2010


The influence of strain and temperature on the thermal diffusivity of solid propellant is investigated. Starting with the classical heat conduction equation for constant thermal properties, a simple procedure for experimentally determining the diffusivity and checking the validity of this equation is described. Existing theoretical bounds on the conductivity of composites with voids are then reviewed. Following a description of the experimental program, transient temperatures in two different solid propellants, covering the temperature range −320 deg F to 140 deg F and strain range 0 to 20 percent, are given and compared with theory. The diffusivity is found to vary noticeably with both strain and temperature.

Copyright © 1974 by ASME
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