The maximum distortional strain energy density criterion for shear fracture propagation with applications to the growth paths of en echelon faults

Mathematics – Logic

Scientific paper

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Crack Propagation, Crustal Fractures, Geological Faults, Shear Stress, Propagation Velocity, Rock Mechanics, Strain Energy Methods

Scientific paper

The use of the present maximum distortional strain energy density criterion for shear fracture propagation under mixed-mode loading conditions shows that while an isolated mode-II shear fracture would tend to propagate in its own plane, the growth path of two en echelon shear fractures deviate from straight lines due to crack interaction. Using a displacement-continuity boundary-element method, the shear fracture propagation paths of two en echelon mode-II faults are shown to converge toward each other irrespective of the sense of shear and fault step.

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