Elastic-Plastic Constraints Analysis for Hole-Edge Crack

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 using J-A₂ elastic-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 parameter A₂ are 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 (A₂ parameter), and this shielding effect gradually weaken with the crack increasing.

• Periodical: Advanced Materials Research (Volume 1095)
• Pages: 505-509
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1095.505
• Online since: March 2015
• Authors: Yi Qin Xie*, Zhong Xian Wang, Yan Qing Zhang
• Keywords: Constraint, Diamond Hole, Elastic-Plastic J-Integral, Hole-Edge Crack, Round Hole, Uniaxial Load

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