Rock fracture toughness testing using SCB specimen

摘要：

　　There are various testing methods for measuring fracture toughness of rocks.The semi-circular bend (SCB) specimen has recently received much attention by researchers for testing mode I fracture toughness of rocks and other geo-materials.While the SCB specimen is often prepared by a straight crack,chevron notched semi-circular bend specimen (CCNSCB) has been rarely utilized.In this paper,using the analytical methods for evaluating the minimum dimensionless stress intensity factor ( * min Y ) of chevron notched specimens,the slice synthesis method is employed to obtain the dimensionless critical stress intensity factor of the specimen.Then,fracture tests are performed on a white crystalline rock under mode I loading using the CCNSCB specimen.The experimental results show very little scatter in the measured values of fracture toughness.

关键词： Rock CCNSCB Experiments Finite element modeling

作者: M. R. Ayatollahi M. J. Alborzi

作者单位: Fatigue and Fracture Lab.,School of Mechanical Engineering,Iran University of Science and Technology,Narmak,16846 Tehran,Iran

会议类型: 国际会议

会议名称: 第13届国际断裂大会(ICF2013)

会议地点: 北京

会议语种:英文

页码: 1-7

在线出版日期: 2013-06-16（万方平台首次上网日期，不代表论文的发表时间）