摘要
用两种3点弯曲圆梁(分别具有人字形切槽和直切槽)测定了一种重庆灰岩的断裂韧度K。测试结果表明:前者比后者在防止过载,避免裂纹扩展偏斜,考虑非线性修正等方面有若干优点,但测试值的尺寸效应尚有待解决。
Chevron-notched and straight-through-notched three-point bend round bars are used to test fracture toughness K of a Chongqing limestone. The results show that the former specimen has some advantages over the latter in the aspects of preventing overload,avoiding deviation of crack growth from notch plane and considering nonlinear correction in calculation,etc. However,the size effects of test values are to be solved.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
1992年第5期101-106,共6页
Journal of Chongqing University
关键词
岩石
断裂韧度
三点变曲圆梁
测试
rock fracture toughness
three-point bend round bar
chevron notch
straight-through notch
Stable crack growth
size effects
