Williams Element with Generalized Degrees of Freedom for Fracture Analysis of Multiple-Cracked Beam

3rd Annual International Workshop on Materials Science and Engineering

Xu, Hua^1 ; Wei, Quyang^1 ; Yang, Lufeng^1,2

Key Laboratory of Disaster Prevention and Structural Safety of China, Ministry of Education, Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, School of Civil Engineering and Architecture, Guangxi University, Nanning

530004, China^1

Department of Housing and Urban-Rural Development, Guangxi Zhuang Autonomous Region, Nanning

530028, China^2

关键词: Calculation efficiency;    Cracked beams;    Fracture analysis;    Main crack;    Method of finite elements;    Singular regions;    Stress intensity factor (SIF);    Williams;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/250/1/012059/pdf
DOI  :  10.1088/1757-899X/250/1/012059

来源: IOP

【 摘 要 】

In this paper, the method of finite element with generalized degrees of freedom (FEDOFs) is used to calculate the stress intensity factor (SIF) of multiple cracked beam and analysed the effect of minor cracks on the main crack SIF in different cases. Williams element is insensitive to the size of singular region. So that calculation efficiency is highly improved. Examples analysis validates that the SIF near the crack tip can be obtained directly though FEDOFs. And the result is well consistent with ANSYS solution and has a satisfied accuracy.