Open Access

ARTICLE

An Elastoplastic Fracture Model Based on Bond-Based Peridynamics

by Liping Zu¹, Yaxun Liu¹, Haoran Zhang¹, Lisheng Liu^2,*, Xin Lai^2,*, Hai Mei²

1 Department of Engineering Structure and Mechanics, Wuhan University of Technology, Wuhan, 430070, China
2 Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics, Wuhan University of Technology, Wuhan, 430070, China

* Corresponding Authors: Lisheng Liu. Email: ; Xin Lai. Email:

Computer Modeling in Engineering & Sciences 2024, 140(3), 2349-2371. https://doi.org/10.32604/cmes.2024.050488

Received 08 February 2024; Accepted 05 April 2024; Issue published 08 July 2024

Abstract

Fracture in ductile materials often occurs in conjunction with plastic deformation. However, in the bond-based peridynamic (BB-PD) theory, the classic mechanical stress is not defined inherently. This makes it difficult to describe plasticity directly using the classical plastic theory. To address the above issue, a unified bond-based peridynamics model was proposed as an effective tool to solve elastoplastic fracture problems. Compared to the existing models, the proposed model directly describes the elastoplastic theory at the bond level without the need for additional calculation means. The results obtained in the context of this model are shown to be consistent with FEM results in regard to force-displacement curves, displacement fields, stress fields, and plastic deformation regions. The model exhibits good capability of capturing crack propagation in ductile material failure problems.

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Keywords

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