Study of calculation method of pure mode II stress intensity factor of fine-grained concrete using different numerical models
Changlin Zhou 1, 2, 3  
,   Bo Peng 1,   An Deng 1,   Xiaofeng Gao 1,   Yaojia Li 1,   Lei Zhou 2, 3,   Zheming Zhu 2, 3
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Chengdu Surveying Geotechnical Research Institute Co., Ltd. of MCC, Chengdu, China
State Key Laboratory of Hydraulics and Mountain River Engineering, School of Architecture and Environment, Sichuan University, Chengdu, China
Key Laboratory of Deep Underground Science and Engineering (Ministry of Education), School of Architecture and Environment, Sichuan University, Chengdu, China
Changlin Zhou   

Department of civil engineering, Chengdu Surveying Geotechnical Research Institute Co., Ltd. of MCC; Sichuan University, China
Submission date: 2020-12-22
Final revision date: 2021-01-21
Acceptance date: 2021-01-21
Online publication date: 2021-03-02
Publication date: 2021-04-15
Journal of Theoretical and Applied Mechanics 2021;59(2):251–264
Measuring and calculating methods of critical stress intensity factors (SIFs) have become hot topics which attracted large attention recently. In this work, anti-symmetrical four-point bending tests of cracked fine-grained concrete specimens were conducted experimentally and numerically by using a computer-controlled universal testing machine and ABAQUS code. A comparative study of the calculation method of pure mode II stress intensity factor of a fine-grained concrete was performed by utilizing the conventional finite element method (FEM) in two and three dimensions as well as the extended finite element method (XFEM) in three dimensions. The results show that in three-dimensional models, the crack mode is closest to the pure mode II at the center of specimen thickness. Pure mode II stress intensity factors obtained by SEAM2D and XFEM3D are 1.013 and 1.0617 times that by SEAM3D, respectively. Pure mode II stress intensity factors of the fine-grained concrete obtained by the conventional FEM are more stable than that by XFEM. The number of mesh circles has slight influence on the calculation results of pure mode II stress intensity factor.
ABAQUS HTML Documentation, 2016, Dassault Systemes.
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