FINITE ELEMENT MODELLING OF COMPLEX 3D STATIC AND DYNAMIC CRACK PROPAGATION BY EMBEDDING COHESIVE ELEMENTS IN ABAQUS

作     者：Xiangting Su Zhenjun Yang Guohua Liu 

作者机构：College of Civil Engineering and Architecture Zhejiang University Hangzhou 310027 China Department of Engineering the University of Liverpool L69 3GQ UK 

出 版 物：《Acta Mechanica Solida Sinica》 (固体力学学报（英文版）)

年 卷 期：2010年第23卷第3期

页      面：271-282页

核心收录：

学科分类：081203[工学-计算机应用技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 081404[工学-供热、供燃气、通风及空调工程] 0802[工学-机械工程] 0835[工学-软件工程] 0814[工学-土木工程] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by EPSRC UK(No.EP/F00656X/1) Xiangting Su's one-year visit to the University of Liverpoo supported by the China Scholarship Council and the National Natural Science Foundation of China(No.50579081) 

主　　题：finite element method cohesive elements three-dimensional crack propagation discrete crack model concrete structures Abaqus 

摘      要：This study proposes an algorithm of embedding cohesive elements in Abaqus and develops the computer code to model 3D complex cragk propagation in quasi-brittle materials in a relatively easy and efficient manner. The cohesive elements with softening traction-separation relations and damage initiation and evolution laws are embedded between solid elements in regions of interest in the initial mesh to model potential cracks. The initial mesh can consist of tetrahedrons, wedges, bricks or a mixture of these elements. Neither remeshing nor objective crack propagation criteria are needed. Four examples of concrete specimens, including a wedgesplitting test, a notched beam under torsion, a pull-out test of an anchored cylinder and a notched beam under impact, were modelled and analysed. The simulated crack propagation processes and load-displacement curves agreed well with test results or other numerical simulations for all the examples using initial meshes with reasonable densities. Making use of Abaqus＇s rich pre/post- processing functionalities and powerful standard/explicit solvers, the developed method offers a practical tool for engineering analysts to model complex 3D fracture problems.