The Influence of Temperature on Mode II Fracture Toughness Using the Punch-Through Shear with Confining Pressure Experiment
The Punch-Through Shear with Confining Pressure (PTS/CP-) experiment has been proven to be a reliable testing method for the determination of Mode II fracture toughness. The Mode II fracture toughness, KIIC, is a measure of the resistance of a material to the propagation of a shear loaded fracture. Due to a simple but effective specimen geometry, the PTS/CP- experiment is the only available experiment that is able to apply a confining pressure independent from the shear load. In this contribution the influence of temperature on fracture toughness is presented and discussed. Several studies have dealt so far with the influence of temperature on Mode I (tensile) fracture toughness, but there is little to no data available on KIIC. The temperature was varied between 25℃ to 250℃ and experiments were carried out on a fine-grained granite. Experimental data suggests that KIIC remains constant up to 150℃ and increases at elevated temperature. Ultrasonic measurements, prior and after heating, provided a basis to link the development of thermally induced cracks to the data of KIIC.
T.Meier T.Backers O.Stephansson
GeoFrames GmbH, Potsdam, Germany
国际会议
香港
英文
1-5
2009-05-19（万方平台首次上网日期，不代表论文的发表时间）