Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
Main positions: President of international exchange committee of the Chinese Society of Rock Mechanics and Engineering CSRME
Other Post: Vice President of the Chinese Society of Rock Mechanics and Engineering CSRME
Title of Paper:三维裂纹扩展的模拟试验
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Date of Publication:2006-07-28
Page Number:345-351
Key Words:数值模拟;三维裂纹;非均匀性;表面裂纹
Abstract:本文首先介绍了RFPA3D中三维裂纹的处理方法,然后应用RFPA3D模拟分析了三种基本三维裂纹的扩展过程,最后模拟分析了表面裂纹边界、裂纹倾角对表面裂纹扩展以及试样破坏过程的影响.表面裂纹部分存在于岩石内部,抑制了裂纹尖端的扩展和影响,但是出露的裂纹端也易于扩展,强度比内置裂纹有所下降.穿透裂纹具有两端扩展的阻力最小,强度最低.表面裂纹比内置裂纹更易发生失稳扩展,但内置裂纹更容易导致脆性破坏.倾角α=45°时表面裂纹最容易扩展,并且试样表现出来的强度最低.表面裂纹的扩展特征强烈依赖于预制裂纹的切割深度和试样厚度的比值.
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