Comments on chevron bend specimen for determining fracture toughness of rock

来源期刊：中国有色金属学报(英文版)2001年第4期

论文作者：孙宗颀 陈枫 徐纪成

文章页码：609 - 612

Key words：fracture toughness; nonlinear correction

Abstract: Based on a number of tests on different rocks, Suggested Methods for Determining the Fracture Toughness of Rock (SMs) was reviewed. The advantages of SMs are obvious, but some problems are also discovered. A serious one is that the nonlinear corrected fracture toughness of chevron bend specimens, K^C_CB , is less than the uncorrected one, K_CB , for hard rock like granite, marble and others. The reason is discussed and the proposal is given.