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Wang Guangzhen
Ji Linhong
Wen Shizhu
Department of Precision Instruments, Tsinghua University,
Beijing 100084, China
Wang Zhishan
School of
Mechanical Engineering
and Automation,
Beijing University of Aeronautics
and Astronautics,
Beijing 100083, China |
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EXPERIMENTAL STUDY ON THE
LOAD DECAY AND
ITS EFFECT ON LEAK RATE OF O-RING*
Abstract:
Experimental studies on load decay and leak rate of O-rings made of two kinds of silicone rubber are conducted. The results show that the characteristic of load decay is relative to the material and temperature of O-rings; the rate of load decay increases with the rise of temperature; the effects of load decay on leak rate of O-rings are negligible at room temperature, but they are notable at high temperature, and they are related to the material of O-rings. On the basis of study on the theory of load decay and analysis to the results of experiments, a theoretical model is developed to de-scribe the load decay characteristic of O-rings, and it matches the experimental data very well. By the study of time-temperature equivalence of load decay, the interconvertting
equation of test data of load decay at different temperatures is obtained.
Key words:
Silicone rubber Loading analysis Maxwell model O-ring |