STRESS INTENSITY FACTORS FOR SEMICIRCULAR SPECIMENS UNDER 3-POINT BENDING

被引:276
作者
LIM, IL
JOHNSTON, IW
CHOI, SK
机构
[1] MONASH UNIV, DEPT CIVIL ENGN, CLAYTON, VIC 3168, AUSTRALIA
[2] CSIRO, DIV GEOMECHAN, SYDNEY, VIC 3149, AUSTRALIA
基金
澳大利亚研究理事会;
关键词
D O I
10.1016/0013-7944(93)90030-V
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
The semi-circular specimen under three-point bending technique is a versatile, cost-effective and reliable method for determining the mixed-mode (I and II) fracture toughness envelope of rocks. However, existing numerical results on the stress intensity factor variation with specimen geometry are very limited. This study extends previous numerical work to cover a wide range of possible specimen geometries of experimental interest. From this, a number of observations relevant to the practical use of this technique are discussed. Analytical functions are then provided as an approximation to the mode I variation of the stress intensity factors.
引用
收藏
页码:363 / 382
页数:20
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