Analysis on cohesive crack opening displacement considering the strain softening effect

作     者：WANG Limin1, XU Shilang2 & ZHAO Xiqiang3 1. Mechanics Department, Shandong University of Technology, Zibo 255049, China 2. Civil Engineering Department, Dalian University of Technology, Dalian 116024, China 3. Mathematics Department, Ocean University of China, Qingdao 266071, China 

作者机构：Mechanics Department Shandong University of Technology Zibo China Civil Engineering Department Dalian University of Technology Dalian China Mathematics Department Ocean University of China Qingdao China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2006年第49卷第1期

页      面：88-101页

核心收录：

学科分类：08[工学] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：the National Natural Science Foundation of China (Grant Nos. 10272068 , 50438010) the Shandong Natural Science Foundation (Grant No. Y2002A02) 

主　　题：cohesive crack, softening, dissipation work, variation approach. 

摘      要：In order to investigate the crack propagation in quasi-brittle materials like rock, ceramic and concrete, Hillerborg and his co-researchers abstracted the fracture process zone in front of a stress free crack in terms of a “fictitious crack zone. On the fictitious crack zone, cohesive stresses distribute following a given softening relationship of stress vs. crack opening. Based on the polynomial or power series expression of cohesive crack opening displacement, the relationship of the cohesive stress vs. the crack opening displacement is established using elastic theory and integral equation, and some unknown physics variables are obtained using variation approach. The calculation results gained in this paper are close to the experimentally test ones.