2007•Hangkong cailiao xuebaoRequires access

A Study of Distribution Characteristic and Parameter Analysis of Pre-Corrosion Fatigue Life

Lei Wang

Abstract

Pre-corrosion is the most important factor which influence the safety and economics for aircraft structures seriously.To study the influence of pre-corrosion on the fatigue life,the fatigue life of corroded 30CrMnSiNi2A and LC4CS component stimulated specimen were tested under random loading.The fatigue life followed the logarithmic normal distribution or the two-parameter Weibull distribution by the probability regression method.The distribution parameter was estimated with the MLE,and the standards variation of the logarithmic fatigue life was weak-correlation with the pre-corrosion time,and the slope of the Weibull distribution was constant.

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Key concepts: Weibull distribution, Logarithm, Materials science, Corrosion, Corrosion fatigue, Distribution (mathematics), Weibull modulus, Structural engineering