摘要
用无缝宽的光测模型试验和位移不连续边界无法研究了压剪条件下缝面和缝端的能量分配和敏感性。试验和计算表明压剪裂纹在缝端存在强烈的应力集中区，属于断裂问题，应由韧性判别，由实验得到的应力场和计算应力场在整体上很相近，但在缝端相差较大，压剪缝延伸可用离缝端一定距离的应力当量韧性来判断。
Study on the energy distribution between crack surface and tip region under compression-shearing load and its sensitivity was given by the photo elastic model containing crack without width and the displacement discontinuity boundary element method. The experiment and calculation show that there is intensive stress concentration at the tip of crack under compression-shearing load. It should be considered as 'Fracture ' problem with 'toughness' criterion. The stresses in whole region obtained by experimental method and ca lculation results are in good agreement, but they are deviated near the tip of crack. The stress condition located at a certain distance from crack tip (equivalent toughness)may be used as the criterion of crack propagation under compression-shearing load.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1996年第1期54-58,共5页
Journal of Tsinghua University(Science and Technology)
关键词
应力场
裂隙体
压剪荷载
裂缝
扩展能
macrostress field
cracked body
compression-shear load
