2006•Key engineering materialsOpen access

Damage Evolution Inspection of Rock Using Digital Speckle Correlation Method (DSCM)

Peng Shao, Lai Gui Wang, Guan Chang Jin

Abstract

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.

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Available abstract

Key concepts: Digital image correlation, Speckle pattern, Rectangle, Materials science, Catastrophic failure, Standard deviation, Deformation (meteorology), Geology