SCATTER CHARACTERISTICS OF FATIGUE LIFE AND THE BEHAVIOR OF SMALL CRACKS

被引：22

作者：

GOTO, M

机构：

[1] Department of Mechanical Engineering, Oita University, Oita

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 1992年 / 15卷 / 10期

关键词：

D O I：

10.1111/j.1460-2695.1992.tb00024.x

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Usually, there is large scatter in fatigue data and this should be evaluated quantitatively when fatigue data are applied to the design of machines and structures. Consequently it is important to clarify the physical basis of scatter in fatigue life. In this present study, rotary bending fatigue tests were performed on an annealed 0.21% carbon steel. At least sixteen smooth specimens were fatigued at each of three stress ranges and successive observations of the surface were studied for all the specimens using the plastic replica method. By examining the initiation and propagation behaviour of cracks the physical basis of scatter in fatigue life is analysed and discussed. To estimate the scatter characteristics quantitatively, the distributions of crack initiation life, propagation life, fatigue life and crack length were individually studied by assuming a Weibull distribution for each set of data.

引用

页码：953 / 963

页数：11

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