Analysis and modelisation of short crack growth by ductile fracture micromechanisms

被引：20

作者：

Betegon, C

Rodriguez, C

Belzunce, FJ

机构：

[1] E.T.S. Ingenieros Industriales, 33204 Gijón, Ctra. Castiello

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 1997年 / 20卷 / 05期

关键词：

ductile crack growth; Gurson model; T stress;

D O I：

10.1111/j.1460-2695.1997.tb00297.x

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A ductile medium strength steel has been modelled by means of the Gurson model, and been used to investigate the effect of crack tip constraint in several fracture mechanics specimens. Both numerical and experimental results have been obtained, in the course of the crack extension process, for single edge notch bending specimens with different crack length-to-width ratios. The geometries with the shorter cracks always exhibited higher J values at initiation and steeper J crack growth resistance curves, and these results have been explained in terms of the stress and strain fields and damage development in the region ahead of the crack tip.

引用

页码：633 / 644

页数：12

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