Analysis of the influence of boundary pressure and friction on determining fracture toughness of shale using cracked Brazilian disc test

被引：14
|
作者：
Yu, Junhong [1 ]
Shang, Xinchun [1 ,2 ]
机构：
[1] Univ Sci & Technol Beijing, Dept Appl Mech, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Natl Ctr Mat Serv Safety, Beijing 100083, Peoples R China
来源：
ENGINEERING FRACTURE MECHANICS | 2019年 / 212卷
关键词：
Cracked Brazilian disc test; Fracture toughness; Pressure distribution; Analytical solution; Shale; STRESS INTENSITY FACTORS; COMBINED MODE FRACTURE; LIMESTONE ROCK; SPECIMEN; GEOMETRY; SIZE;
D O I：
10.1016/j.engfracmech.2019.03.009
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
As the exact distributions of the pressure and friction on the disc-jaw interface are not known in the cracked Brazilian disc test, we analyze their influence on determining mode I fracture toughness. The analytic solution of stress intensity factor is derived for the arbitrarily distributed pressure and friction by using the power series expansion technique and weight function method. This investigation shows that such influence should be considered for the case of large contact angle and long crack. The mode I fracture toughness of shale is determined indirectly from the test.
引用
收藏
页码：57 / 69
页数：13
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