Analysis of the influence of boundary pressure and friction on determining fracture toughness of shale using cracked Brazilian disc test. (1st May 2019)

• Record Type: Journal Article
• Authors: Yu, Junhong; Shang, Xinchun
• Is Part Of: Engineering fracture mechanics. Volume 212(2019)
• Page Start: 57
• Page End: 69
• Publication Date: 2019-05-01
• Subjects: Cracked Brazilian disc test -- Fracture toughness -- Pressure distribution -- Analytical solution -- Shale; Fracture mechanics -- Periodicals; Rupture, Mécanique de la -- Périodiques; Fracture mechanics; Periodicals; 620.112605
• DOI: 10.1016/j.engfracmech.2019.03.009
• Languages: English
• ISSNs: 0013-7944

Abstract

Highlights: Find the analytical solution of K Ι for the CSTBD under arbitrarily distributed loads. For the case of large contact angle and long crack, the effect of load distribution should be considered. The K ΙC of shale is determined indirectly. Abstract: 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.