Experimental and Numerical Investigation on the Tensile Fracture of Compacted Clay  

作　　者：Chengbao Hu Liang Wang Daosheng Ling Wujun Cai Zhijie Huang Shilin Gong 

机构地区：[1]MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering,Zhejiang University,Hangzhou,310058,China [2]Institute of Geotechnical Engineering,Zhejiang University,Hangzhou,310058,China [3]School of Civil Engineering and Architecture,Ningbo Institute of Technology,Zhejiang University,Ningbo,315100,China [4]Department of Mechanical and Aerospace Engineering,University of Miami,Coral Gables,33123,USA [5]Zhongnan Engineering Co.,Ltd.,Changsha,410014,China

出　　处：《Computer Modeling in Engineering & Sciences》2020年第4期283-307,共25页工程与科学中的计算机建模（英文）

基　　金：sponsored by the National Key Research and Development Program of China(No.2016YFC0800200);the National Basic Research Program of China(No.2014CB047000),and the NSFC(Grant No.51578502).

摘　　要：This paper performed flexural test and numerical simulation of clay-beams with different water contents to study the tensile fracture of clay soil and the relevant mechanisms.The crack initiation and propagation process and the accompanied strain localization behaviors were all clearly observed and analyzed.The exponential cohesive zone model was proposed to simulate the crack interface behavior of the cohesive-frictional materials.The experimental results show that the bending capacity of clay-beams decrease with the water content,while those of the crack mouth opening displacement,crack-tip strain and the strain localization range increase.The numerical predictions successfully reproduce the evolving tensile cracks and the strain localization phenomenon of the clay beams with different fracture ductility,which demonstrates the validity of the proposed cohesive zone model in modelling clay fractures.

关 键 词：CLAY tensile fracture flexural beam test strain localization cohesive element. 

分 类 号：TG1[金属学及工艺—金属学]