This paper comments on using the Larson-Miller parameter to fit the creep-rupture life distribution as a function of temperature and stress. The commonly used least-squares linear regression method assumes that the creep-rupture life follows the lognormal distribution. Most engineering literature does not discuss the validity of this assumption. In this paper, we outline the procedure for validating two critical assumptions when the least-squares method is used. The maximum likelihood method is suggested as an alternative and more powerful method for fitting creep-rupture life distributions. Examples are given to demonstrate the use of these two methods using Microsoft Excel and the LIFEREG procedure in SAS. [S0094-9930(00)00504-7]
Fitting Creep-Rupture Life Distribution Using Accelerated Life Testing Data
Contributed by the Pressure Vessels and Piping Division for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received by the PVP Division, April 8, 1998; revised manuscript received July 6, 2000. Technical Editor: S. Y. Zamrik.
Zuo, M., Chiovelli, S., and Nonaka, Y. (July 6, 2000). "Fitting Creep-Rupture Life Distribution Using Accelerated Life Testing Data ." ASME. J. Pressure Vessel Technol. November 2000; 122(4): 482–487. https://doi.org/10.1115/1.1310164
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