Fatigue crack propagation across grain boundary of Al-Cu-Mg bicrystal based on crystal plasticity XFEM and cohesive zone model  

作　　者：Qi Zhao Magd Abdel Wahab Yong Ling Zhiyi Liu 

机构地区：[1]School of Materials Science and Engineering,Hubei University of Automotive Technology,Shiyan 442002,China [2]Faculty of Mechanical-Electrical and Computer Engineering,School of Engineering and Technology,Van Lang University,Ho Chi Minh City,Vietnam [3]Soete Laboratory,Faculty of Engineering and Architecture,Ghent University,Technologiepark Zwijnaarde 903,B-9052 Zwijnaarde,Belgium [4]School of Materials Science and Engineering,Central South University,Changsha 410083,China

出　　处：《Journal of Materials Science & Technology》2022年第31期275-287,共13页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foun-dation of China(51901073).Qi Zhao was Visiting Scholar to the Soete Laboratory at Ghent University and supported by China Scholarship Council when this work is done.The authors wish to express their gratitude to Van Lang University,Vietnam for finan-cial support for this research.

摘　　要：In this paper,a methodology integrating crystal plasticity(CP),the eXtended finite element method(XFEM)and the cohesive zone model(CZM)is developed for an Al-Cu-Mg alloy to predict fatigue crack propagation(FCP)across grain boundary(GB)of Al-Cu-Mg alloy during stageІІ.One GB model is incor-porated into FCP constitutive law to describe grain interaction at GB.A bicrystal containing GB is built up to simulate FCP behavior through L participated GBs.Modelling features including GB characteristic,cumulative plastic strain(CPS)distribution and crystal slipping evidence can be identified.The numer-ical results are compared with published experimental data to check the accuracy of model.This work demonstrates that the combination of CP containing GB constitutive laws,XFEM and CZM is a promising methodology in predicting twist angle-controlled crack deflection through GBs.

关 键 词：Grain boundary Twist angle Crystal plasticity Extended finite element method Fatigue crack propagation Cumulative plastic strain 

分 类 号：TG146.21[一般工业技术—材料科学与工程]