Relationship between Compressive Deformation and Temperature Variation in Urethane Rubber

Abstract

It is well known that temperature of rubber varies when it is deformed, as the Gough-Joule effect. Although compressed parts are often made from rubber, the temperature variation of rubber under compression has not been studied well. Studying temperature variation of rubber is important for efficient use of rubber. In this study, we studied a temperature variation of urethane rubber subjected to a uniaxial compressive loading. First, the temperature was measured at the center and at the sides with thermocouple, and radiation thermometer. Second, a stress relaxation test was conducted. As a result, in the first experiment, temperature increments of 1.4 ℃ at the center and 0.8 ℃ at the side of the specimen were confirmed during compression. There was little difference between values measured with thermocouple and radiation thermometer. In the second experiment, the experiment value was larger than our theoretical one by 0.5 ℃ at most.