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Fracture characteristics and multifractal analysis of strain fields in granite with different inter-flaw angles
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DOI：10.1016/j.tafmec.2026.105854.png)
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Abstract
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• The influence of inter-flaw angle on the macroscopic mechanical response of granite was revealed. • The evolution of Mode I and Mode II SIFs at rock-bridge flaw tips was quantitatively characterized using the DIC-Williams method. • The SIF correlation between rock-bridge flaw tips was found to change from weak to strong after 84% of the peak load. • With increasing inter-flaw angle, the promoting effect of Mode I SIF increased, whereas the inhibiting effect of Mode II SIF weakened. • Multifractal analysis revealed differences in strain-field heterogeneity evolution under different inter-flaw angles.
Keywords:
Granite with varying inter-flaw angles
Stress intensity factor
Digital image correlation
Spearman correlation analysis
Multifractal
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