The influence of temperature and confining pressure on the cracks damage threshold and shape parameter m of igneous rock

Determining rock damage thresholds is of great significance in predicting rock fracture. In this study, the relation among crack damage stress threshold (σcd), peak strength (σucs) and shape parameter m was observed. The impact imposed by temperature and confining pressure on m was then examined. The results show that there is an approximate linear relationship between σcd and σucs. Therefore, the normalized quantity σcd/σucs is considered one...