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Accelerated Isothermal Material Life Test Based on Equal Sample Degradation States
Technical Paper
1999-01-1087
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This method provides a rapid way to verify or refine the activation energy on which the design life estimate of a part, subject to thermal degradation, is based. Data on material activation energy is now usually available, although some research effort is often required to find it. Suppliers or manufacturers may provide test data on aging characteristics of the part. In this case the test serves to validate the supplier data and support the subsequentdesign life estimate.This accelerated procedure, based on the same Arrhenius model of the thermal aging process as standard tests, uses an initial estimate of activation energy to design a time/temperature test sequence that can be completed in less than one week. More precise estimates of activation energy can be obtained by iterating the test procedure based on the first test results.
Citation
Daniels, G. and Gurunatha, T., "Accelerated Isothermal Material Life Test Based on Equal Sample Degradation States," SAE Technical Paper 1999-01-1087, 1999, https://doi.org/10.4271/1999-01-1087.Also In
References
- For fundamentals of chemical thermodynamics, Heat and Thermodynamics Zemansky, Mark W. 404 447
- For applications of Arrhenius methods to chemical processes The Elements of Physical Chemistry Atkins, P. W. 253 263
- For a large collection of statistical methods for accelerated testing, Accelerated Testing. Statistical Models. Test Plans, and Data Analyses Nelson Wayne