Stress Relaxation as Used in Underhood Component Design Verification

Paper #:
  • 930090

Published:
  • 1993-03-01
Citation:
Belchuk, M., "Stress Relaxation as Used in Underhood Component Design Verification," SAE Technical Paper 930090, 1993, https://doi.org/10.4271/930090.
Author(s):
Pages:
5
Abstract:
Bench testing is a critical step in the design verification process of underhood components. The challenge to the test engineer in developing a component test is to both simulate in-use conditions and to establish useful and measurable performance criteria.The primary performance criteria for a sealing system, as in a rocker cover, is its ability to maintain a minimum sealing force necessary to prevent leakage. Compressive stress relaxation has been shown to be an important test for evaluating sealing materials and through the ASTM E-328 test method, a complete sealing system assembly can be evaluated.A test system has been developed to measure compressive stress relaxation of actual components and component assemblies under a variety of environmental conditions. The system was used to verify the design of a rocker cover assembly for its ability to maintain a minimum sealing force under simulated engine operating conditions.
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