Elastic-Plastic Constraints Analysis for Hole-Edge Crack

Author:

Xie Yi Qin1,Wang Zhong Xian1,Zhang Yan Qing1

Affiliation:

1. Jiangsu University

Abstract

This paper mainly conducts an elastic-plastic constraint analysis on rectangular plate specimens with hole-edge crack under remote uniaxial uniformly distributed load by usingJ-A2elastic-plastic fracture theory. In order to analyze the effect of orifice on elastoplastic stress field of hole-edge crack tip, this paper calculates a series of round hole-edge crack, diamond hole-edge crack and corresponding pure crack models. The interference effects of the orifice shape on elastic-plastic J integral and crack constraint parameterA2are discussed. The results show that: the orifice has an amplification effect on the fracture driving force (J-integral), and this amplification effect in elastic-plastic is smaller than that in elastic; the orifice has a shielding effect on the crack tip constraint (A2parameter), and this shielding effect gradually weaken with the crack increasing.

Publisher

Trans Tech Publications, Ltd.

Subject

General Engineering

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