Considerations in single and multiple stress accelerated life testing
Some of the important aspects of accelerated-stress life testing such as extrapolation distance and sample size determination are considered. Also addressed are the advantages of applying more than one accelerated stress to induce failure. A frequent problem in applied research and development is the determination of the length of useful life, or ''service life'' as it is commonly called, of a material, component or system. The estimation of service life is an extremely difficult and challenging undertaking, especially when the service life is considerably longer than the available testing time. In such situations testing is generally carried out at a series of stress levels higher than those experienced under normal service conditions. Life at the higher stress levels is then extrapolated to obtain an estimated service life under normal operating stress. This methodology has come to be known as accelerated-life, accelerated-stress or, simply, accelerated testing. This paper will address some of the important aspects of such tests, such as extrapolation and sample size determination, and will address the advantages of applying more than a single accelerated stress.
- Research Organization:
- Battelle Columbus Laboratories, 505 King Avenue, Columbus, Ohio 43201
- OSTI ID:
- 5747430
- Journal Information:
- J. Qual. Technol.; (United States), Vol. 14:3
- Country of Publication:
- United States
- Language:
- English
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