A comparison is presented between experimental observations made from gypsum
specimens loaded in uniaxial compression, with open and closed flaws. Three types of …

A novel test specimen was designed for experimental investigations of pure and mixed
mode fracture. This novel test configuration is called “modified edge notched disc bend”(M …

Towards measuring the mixed-mode I+ III fracture toughness independent of geometry and
loading type, two test specimens were numerically and experimentally compared. The …

This paper studies experimentally the coalescence mechanism between two parallel three-
dimensional (3-D) pre-existing surface cracks in granite specimen under uniaxial …

This paper discusses the use of the double-edge notched Brazilian disk test (DNBD) for
measuring true mode II fracture toughness of rocks. The term true emphasises that in this …

The effect of specimen size on mixed mode fracture resistance of a sedimentary soft rock
(Guiting limestone) has been investigated. Two types of specimen have been used: edge …

Experimental and theoretical analyses are presented that assess true mode II fracture
toughness, K IIc, fracture energy, G IIc, and associated fracture process zone (FPZ) in …

In this context, four specimens, ie (i) circumferentially notched cylindrical torsion (CNCT),(ii)
circumferentially notched cylindrical direct tension (CNCDT),(iii) edge notch disc bend …

A mixed mode fracture criterion based on the strain energy density averaged over a control
volume has been successfully used earlier for evaluating the brittle fracture behavior of …

A semi-disk specimen containing an angled edge crack has been used in the past for
conducting fracture tests on a brittle rock named Johnstone [Fracture testing of a soft rock …