Effect of Various Side Grooves on 3D Crack-Front J-Integral for CT Specimens
Three-dimensional (3D) elastic-plastic finite element model (FEM) is adopted to research the effect of side grooves on the crack-front J-integral for different size of Compact Tension (CT) specimens.Although the side-grooved CT specimen is widely used in the existing test method,such as ASTM E1820-13,the test data of fracture toughness is varying with the various geometric parameters.Before FE calculation,the material properties of Q345 steel were obtained by uniaxial tensile test,especially for the true stress-strain relationship.In this paper,it focuses on the numerical study of geometric parameter effects on the fracture toughness.Toward this end,the commercial FE software of ABAQUS is adopted to calculate the J-integral.Since the side groove of CT specimen is so important to make the fracture test success,the various parameters of side groove is intensively analyzed for obtaining the accurate J-integral along the crack front,including the effects of the depth,angle and root radius.In fact,the side groove effect is so significant around the crack front that cannot be ignored in the J-integral calculation.Through rigorous FE investigation,the influence of the side groove on the fracture toughness testing is fully disclosed,and the appropriate side groove configuration is recommended accordingly.
Side grooves CT specimen FEA J-integral Fracture toughness
Xiangqing Li Chuanxiao Wu Jianfeng Mao Shiyi Bao Zengliang Gao
Institute of Process Equipment and Control Engineering,Zhejiang University of Technology,Hangzhou 31 Institute of Process Equipment and Control Engineering,Zhejiang University of Technology,Hangzhou 31
国际会议
2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)
天津
英文
46-50
2016-05-26（万方平台首次上网日期，不代表论文的发表时间）