An Elastoplastic Fracture Model Based on Bond-Based Peridynamics  

作　　者：Liping Zu Yaxun Liu Haoran Zhang Lisheng Liu Xin Lai Hai Mei 

机构地区：[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

出　　处：《Computer Modeling in Engineering & Sciences》2024年第9期2349-2371,共23页工程与科学中的计算机建模（英文）

基　　金：The corresponding author Lisheng Liu acknowledges the support from the National Natural Science Foundation of China(No.11972267);The corresponding author Xin Lai acknowledges the support from the National Natural Science Foundation of China(No.11802214).

摘　　要：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.

关 键 词：Ductile materials plastic deformation bond-based peridynamics isotropic hardening fracture analysis 

分 类 号：O313[理学—一般力学与力学基础]