PREDICTION OF THE LIFETIME DISTRIBUTION OF HIGH-STRENGTH COMPONENTS SUBJECTED TO FATIGUE LOADING

被引：22

作者：

BRUCKNERFOIT, A ^{[1
]}

JACKELS, H ^{[1
]}

QUADFASEL, U ^{[1
]}

机构：

[1] MAX PLANCK INST MET RES,INST WERKSTOFFWISSENSCH,D-70174 STUTTGART,GERMANY

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 1993年 / 16卷 / 08期

关键词：

D O I：

10.1111/j.1460-2695.1993.tb00127.x

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A probabilistic model is developed for predicting the lifetime distribution of a high-strength component subjected to low cycle fatigue loading. The damage process considered consists of two consecutive stages. First, cracks are initiated from microstructural inhomogeneities such as non-metallic inclusions. These cracks will then extend stably until final failure occurs or the component is removed from service. The probabilistic model is used to determine the maximum tolerable inclusion size for a model turbine disc. This quantity is defined as the size of the initial defect for which the number of load cycles to failure at a given reliability level exceeds the design life of the component. This maximum tolerable inclusion size is compared with the results of a deterministic lifetime analysis.

引用

页码：891 / 908

页数：18