岩石Ⅱ型裂纹扩展的一般规律

来源期刊：中南大学学报(自然科学版)1994年第4期

论文作者：王桂尧 孙宗颀 黎振兹

文章页码：450 - 454

关键词：断裂韧性; 断裂判据; 剪切裂纹

Key words：fracture toughness; fracture criteria; shear crack

摘    要：对大理岩Ⅱ型裂纹的扩展规律进行了实验研究,认为岩石Ⅱ型裂纹的扩展具有机理完全不同的Ⅰ型、Ⅰ－Ⅱ复合型及Ⅱ型3种断裂形式,因而有3个不同的剪切断裂韧性及在纯剪断裂条件下,由此认为剪切裂纹的扩展应有3个不同的判据.

Abstract: The research investigated the Mode-Ⅱcrack propagation in marble specimen.It isshowed that Mode-Ⅱcrack has three different fracture patterns,i.e.Mode-Ⅰ,Mode-Ⅱ orthe combination of both. These fracture modes correspond to three different fracture tough-ness,and In pure shear conditions,the fracture toughness of the marble hasthe relationship of and It is thought that Mode-Ⅱ crack shouldhave three different fracture criteria.