Evaluation of mode 1 stress intensity factor for edge crack using displacement extrapolation method

被引：0

作者：

Kirthan L.J. ^{[1
]}

Hegde R. ^{[1
]}

Girisha V.A. ^{[1
]}

Kumar R.G. ^{[1
]}

机构：

[1] Department of Mechanical Engineering, RV College of Engineering, Bangalore, 560059, Karnataka

来源：

International Journal of Materials and Structural Integrity | 2016年 / 10卷 / 01期

关键词：

Displacement extrapolation method; SINGULAR element; Stress intensity factor;

D O I：

10.1504/IJMSI.2016.079651

中图分类号：

学科分类号：

摘要：

Fracture is a failure mode due to unstable propagation of a crack due to applied stress. This paper aims towards evaluating stress intensity factor for mode 1 crack propagation using compact tension specimen using displacement extrapolation method and comparing it with analytical solutions. Compact tension specimen was tested for mode 1 crack propagation and stress intensity factor was evaluated for different crack lengths. Displacement extrapolation method was used to find the stress intensity factor by considering the displacements at the flagged nodes near the crack tip and then was compared with the analytical results. Displacement extrapolation method showed good agreement with the analytical results. The results show that the SIF increased at a very slow rate in the beginning of the crack growth and increased rapidly later. This was because of the plastic zone at the crack tip getting increased. This increased the resistance offered by the crack to the propagation. Copyright © 2016 Inderscience Enterprises Ltd.

引用

页码：11 / 22

页数：11

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