Reliability strength design through inverse distributions—exponential and Weibull cases

This paper illustrates the inverse reliability design techniques for exponential and Weibull stress-strength models. Expressions for factor of safety, mean strength and its variability have been derived for a given range of target reliability and external load conditions. In the case of exponential models a global solution has been found out whereas in the case of the Weibull model only some specific cases have been considered. The difficulty in obtaining a global solution in the Weibull model has been discussed with possible methods to attain it.