Study on Strength Distribution and Failure Probability for IG-110

As brittle material,graphite has scattered strength.Probabilistic method is more appropriate to evaluate the failure of graphite than deterministic method.The distribution function used in probabilistic method has big influence on results.Weibull distribution is commonly applied in the strength fitting.However,in some situations like multi stress and residual stress Weibull distribution is not suitable.The study of the applicability of different distribution on brittle materials is not much.Therefore,this paper uses a large amount of strength tests data to study the fitness of normal,lognormal and Weibull distribution.Also,the influence of distribution on probabilistic method has been studied.