Answers are grounded in this paper and cite their sources.
In order to evaluate the damage evolution of rock under external loading, the surface deformation field of a rectangle marble specimen is inspected and analyzed using digital speckle correlation method (DSCM). Experimental results show that the damage evolution of rock undergoes 3 stages: they are uniformly distributed damage, localized damage and catastrophic failure stage. A statistic indicator, standard deviation of the strain field, can be used to quantitatively express the damage localization level.
No takes yet. Share an insight, caveat, or question.
Wang et al. (2006) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: