摘要
采用自行设计的加载压头和粘接在V形切口短棒岩石断裂韧度试件上的2个半圆形钢片,实现了通过压头施加压缩载荷从而使裂纹尖端承受拉仲载荷的目的。用这种方法可测定岩石的断裂韧度。特别是可以在分离式霍布金生压杆装置上较方便地测定应力波加载时岩石的动态断裂韧度。研究了加载率对岩石断裂韧度等材料性能的影响,并给出大理岩动静态断裂韧度的测定结果。
On the basis of the chevron, notched short-rod specimen for fracture toughness test suggested by ISRM, a designed wedge and two semi-circle slices were used to enable compressive force to be applied on the wedge, whereas the crack tip remained loaded in tension. Thus, fracture toughness of rock could be determined by this metaod. Especially, dynamic fracture toughness of rock could be conveniently measured by the method with the wedge and slices, and the effect of loading rates on the fracture toughness of rock could be studied through this way. Finally, some measuring results of static /dynamic fracture toughness for marble were shown.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
1992年第2期123-127,共5页
Journal of University of Science and Technology Beijing
关键词
岩石
短棒试件
断裂韧度
应力波
short rod specimen, rock, fracture toughness, stress wave
