Localization pattern evolution of rock under uniaxial compression experiments

Abstract eng:
We report three modes of the localized zone evolution observed in uniaxial compression experiments of rock. A single rupture surface formed in three samples, but the strain patterns are obviously different. For marble 1 sample, only one high strain zone was observed and the eventual rupture surface formed in the high strain zone. However, two high strain zones appeared in marble 2 and granite 1. Interestingly, in granite 1, two high strain zones presented a process of competition and selection. During this process, one high strain finally withdraws the competition and the rupture surface formed in the other high strain zone. For marble 2, two high strain zones evolved simultaneously but the growth of one high strain zone became turned in a new direction along the other high strain zone, finally these two high strain zones connected and induced eventual rupture.

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