Abstract
This article analyzes the MDST as a method for determining KIIc, in function of the confining pressure, of homogeneous rock and concrete and proposes a simple way for KIIc envelope determination. The study was carried out by numerical analysis and the main conclusions are as follows: i) MDST is suitable for KIIc determination, since mode II prevails in the test; ii) horizontal fracture is due to shear; iii) the confining pressure must be determined at the fracture tip (σn (tip)); iv) two equations were proposed for determining KIIc in function of σn (tip); v) KIIc envelopes were obtained for some rocks and concrete; and vi) KIIc for σn (tip) equal to zero probably does not exist.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
