A criterion for brittle fracture in U-notched components under mixed mode loading

被引：95

作者：

Ayatollahi, M. R. ^{[1
]}

Torabi, A. R. ^{[1
]}

机构：

[1] Iran Univ Sci & Technol, Dept Mech Engn, Fatigue & Fracture Res Lab, Tehran 16846, Iran

来源：

ENGINEERING FRACTURE MECHANICS | 2009年 / 76卷 / 12期

关键词：

Brittle fracture; U-notch; Mixed mode loading; UMTS criterion; Notch stress intensity factor; FAILURE CRITERIA; SHARP NOTCHES; CRACK ONSET; V-NOTCHES; STRESS; INITIATION; TOUGHNESS; PREDICT; ENERGY;

D O I：

10.1016/j.engfracmech.2009.04.008

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

A failure criterion is proposed for brittle fracture in U-notched components under mixed-mode static loading. The criterion, called UNITS, is developed based on the maximum tangential stress criterion and also a criterion proposed in the past for mode I failure of rounded V-shaped notches [Gomez FJ, Elices M. A fracture criterion for blunted V-notched samples. Int J Fracture 2004;127:239-64]. Using the UMTS criterion, a set of fracture curves are derived in terms of the notch stress intensity factors. These curves can be used to predict the mixed mode fracture toughness and the crack initiation angle at the notch tip. An expression is also obtained from this criterion for predicting fracture toughness of U-notched components in pure mode II loading. It is shown that there is a good agreement: between the results of LIMITS criterion and the experimental data obtained by other authors from three-point bend specimens. (C) 2009 Elsevier Ltd. All rights reserved,

引用

页码：1883 / 1896

页数：14

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