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The extended boundary element analysis of stress fields of V-notched/cracked structures in bonded bimaterials

Cong Li, Bin Hu and Zhongrong Niu

Vol. 19 (2024), No. 3, 303–321
Abstract

The extended boundary element method (XBEM) is employed to calculate the whole displacement and stress fields of the plane V-notched/cracked structure in a bonded bimaterial under different elastic modulus ratios. Firstly, the V-notched/cracked structure is divided into two parts, which are a small region around the notch tip and the outer region without the tip region. Then, the asymptotic series of the singular stress fields in the notch tip region are embedded with the boundary integral equation for the outer region without stress singularity. Numerical examples show the accuracy and effectiveness of the XBEM for obtaining the whole displacement and stress fields of the V-notched/cracked structure in bonded bimaterials. It is demonstrated that the notch/crack tip region of the V-notched/cracked structure in bonded bimaterials should choose reasonable eigen-pairs.

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Keywords
V-notch/crack, bimaterial, stress fields, extended boundary element method, elastic modulus ratio
Milestones
Received: 11 May 2022
Revised: 22 May 2023
Accepted: 2 December 2023
Published: 27 March 2024
Authors
Cong Li
School of Civil Engineering
Anhui Jianzhu University
Hefei
China
Bin Hu
School of Civil Engineering and Architecture
Anhui University of Science and Technology
Huainan
China
Zhongrong Niu
School of Civil Engineering
Hefei University of Technology
Hefei
China