Research on the Propagation Pattern of 3-D Initial Crack in Rock-Like Material under Uniaxial Tension

Abstract:

Experiments and numerical simulations were conducted to investigate the propagation patterns of pre-existing 3-D elliptical crack in rock-like material under uniaxial tension. Research results demonstrated that as the load was increased, the wrapping wing cracks initiated near the front of long axis of crack, with the lateral growth of initial crack close to the front of short axis. A distortion surface formed from the growth of initial crack leaded to the macro fracture of samples. The distribution laws of mixed-mode stress intensity factor (SIF) along crack contour were derived with FRANC3D, and propagation process of 3-D crack under tension was simulated. It was concluded that propagation patterns of 3-D crack under tension were quite different from compressive cases, mainly in aspects of growth orientation and velocity.

• Periodical: Key Engineering Materials (Volumes 452-453)
• Pages: 817-820
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.452-453.817
• Online since: November 2010
• Authors: L. Yang, Y. Jiang, Shu Cai Li, B. Li
• Keywords: 3-D Crack, Numerical Simulation, Propagation Pattern, Rock-Like Material, Stress Intensity Factor (SIF), Uniaxial Tension, Wrapping Wing Crack

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