Assessment of methods for prediction of notch and size effects at the fatigue limit based on test data by Bohm and Magin

被引：68

作者：

Harkegard, G. ^{[1
]}

Halleraker, G. ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Engn Design & Mat, NO-7491 Trondheim, Norway

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2010年 / 32卷 / 10期

关键词：

Fatigue limit; Notches; Predictive capability; Size effects; Steel; COMPONENTS;

D O I：

10.1016/j.ijfatigue.2010.03.011

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A variety of methods are available for the assessment of notch and size effects in fatigue. The purpose of the present investigation is to rank such methods according to their predictive capability. Smooth and notched fatigue limits for 26 different specimen geometries investigated by Bohm and Magin serve as a basis for this ranking. The quality of predictions is expressed in terms of their respective coefficients of variation. COV, for the 26 specimen geometries. COV is 16% for the peak-stress approach and ranges from 12% to 10% for the theories of Peterson, Neuber and critical distances. The stress gradient, the weakest-link and the highly-stressed-volume (V90) theories yield the best predictions with COV in the range from 8% to 6%. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1701 / 1709

页数：9

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