Modeling the propagation mechanism of two random micro cracks in rock Samples under uniform tensile loading
The breakage mechanism of brittle substances such as rocks under uniform tensile loading is considered.The random micro cracks are mostly produced in all of Polycrystalline substances resulting from stress concentration.This paper focuses on the interaction of two pre-existing micro cracks.The quality of the growing and coalescing of micro cracks in rock-like specimen are studied by using a Fortran Code HDDMCR2D which is based on a two dimensional displacement discontinuity method for the crack analysis (a boundary element computer code based on the linear elastic fracture mechanics (LEFM) theory).In order to improve the accuracy of the results and reduce the errors in calculating displacement discontinuity in the proposed model,the higher-order elements (quadratic elements) are used to discretize a sufficient number of boundary elements.Also to eliminate errors caused by stress and displacement singularity near the crack tip,three special elements has been used to discretize each crack end.In this research,the problems of wing cracks propagated at different angles from the original micro crack tips in an infinite specimen under uniform tension are considered.
micro crack interaction crack initiation LEFM BEM crack coalescence
Hadi Haeri Kourosh Shahriar Mohammad Fatehi Marji Parviz Moarefvand
candidate of rock mechanics,Mining Engineering Department,Science and Research Branch,Islamic Azad U Department of Mining and Metallurgical Engineering,Amirkabir University of Technology,Tehran,Iran Head of Mine exploitation Engineering Department,Faculty of Mining and Metallurgy,Institution of Eng
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）