Fracture of U-notched specimens under mixed mode: Experimental results and numerical predictions

被引：96

作者：

Gomez, F. J. ^{[1
]}

Elices, M. ^{[1
]}

Berto, F. ^{[2
]}

Lazzarin, P. ^{[2
]}

机构：

[1] Univ Politecn Madrid, Dept Mat Sci, E-28040 Madrid, Spain

[2] Univ Padua, Dept Management & Engn, I-36100 Vicenza, Italy

来源：

ENGINEERING FRACTURE MECHANICS | 2009年 / 76卷 / 02期

关键词：

Notched components; Mixed mode loading; Rupture; Cohesive crack; Notch radius; COHESIVE CRACK; SHARP NOTCHES; STRAIN-ENERGY; ELASTIC-MATERIALS; FAILURE CRITERIA; BRITTLE-FRACTURE; INITIATION; VOLUME; COMPONENTS; ELEMENTS;

D O I：

10.1016/j.engfracmech.2008.10.001

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The first part of the paper gives an account of 153 fracture tests on blunted notched specimens (with notches of root radius ranging from 0.3 to 4.0 mm), loaded under mixed mode (ranging from almost pure mode I to mode II, and beyond). Maximum loads and initial crack angles were measured as a function of notch root radius and loading mixity. Such results can help in evaluating numerical models of the fracture of notched components. The second part of the paper deals with the suitability of the cohesive crack concept for predicting fracture loads under mixed mode. Use of local mode I was considered for numerical computations. Comparison of experimental results with numerical predictions was significantly accurate. Diagrams of fracture loci for notched components loaded under mixed mode are discussed. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：236 / 249

页数：14

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