A Boundary-Element Analysis of Crack Problems in Multilayered Elastic Media: A Review

Lei Lan, Jiaqi Zhou, Wanrong Xu, Gongbo Long (), Boqi Xiao and Guanshui Xu
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Lei Lan: School of Innovation and Entrepreneurship, Wuhan Railway Vocational College of Technology, Wuhan 430205, China
Jiaqi Zhou: Hubei Provincial Key Laboratory of Chemical Equipment Intensification and Intrinsic Safety, School of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan 430205, China
Wanrong Xu: Hubei Provincial Engineering Technology Research Center of Green Chemical Equipment, School of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan 430205, China
Gongbo Long: Hubei Provincial Key Laboratory of Chemical Equipment Intensification and Intrinsic Safety, School of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan 430205, China
Boqi Xiao: Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong, China
Guanshui Xu: Department of Mechanical Engineering, The University of California, Riverside, CA 92521, USA

Mathematics, 2023, vol. 11, issue 19, 1-24

Abstract: Crack problems in multilayered elastic media have attracted extensive attention for years due to their wide applications in both a theoretical analysis and practical industry. The boundary element method (BEM) is widely chosen among various numerical methods to solve the crack problems. Compared to other numerical methods, such as the phase field method (PFM) or the finite element method (FEM), the BEM ensures satisfying accuracy, broad applicability, and satisfactory efficiency. Therefore, this paper reviews the state-of-the-art progress in a boundary-element analysis of the crack problems in multilayered elastic media by concentrating on implementations of the two branches of the BEM: the displacement discontinuity method (DDM) and the direct method (DM). The review shows limitation of the DDM in applicability at first and subsequently reveals the inapplicability of the conventional DM for the crack problems. After that, the review outlines a pre-treatment that makes the DM applicable for the crack problems and presents a DM-based method that solves the crack problems more efficiently than the conventional DM but still more slowly than the DDM. Then, the review highlights a method that combines the DDM and the DM so that it shares both the efficiency of the DDM and broad applicability of the DM after the pre-treatment, making it a promising candidate for an analysis of the crack problems. In addition, the paper presents numerical examples to demonstrate an even faster approximation with the combined method for a thin layer, which is one of the challenges for hydraulic-fracturing simulation. Finally, the review concludes with a comprehensive summary and an outlook for future study.

Keywords: displacement discontinuity method; direct method; crack problems; multilayered elastic media (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
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