Numerical Simulation of Failure Mode and Crack Propagation of Marble with Pre-Existing Fissure

Abstract:

Laboratory experiments and numerical simulations, using Particle Flow Code (PFC2D ), were performed to study the behavior of marble under tri-axial loading and pre-existing fissure uniaxial compression. The laboratory tri-axial compression results of marble was analyzed, and the calibration of the micro-properties of BMP (Bonded particle model ) in PFC2D with the test data was carried out successfully. The pre-existing fissure was simulated by smooth joint contact, and the cracking propagation mode of pre-existing fissure was carried out with the calibrated BMP properties and single smooth joint contact. The simulation show that the tensile crack firstly initiated along the vertical direction to pre-existing fissure, and then gradually departs towards the direction of axial stress, and finally develops along the direction of axial during compression. The numerical simulation coincide with our understanding of fracture mechanics.

• Periodical: Applied Mechanics and Materials (Volumes 236-237)
• Pages: 153-157
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.236-237.153
• Online since: November 2012
• Authors: Wei Song
• Keywords: Bonded Particle Model, Crack Propagation, Micromechanics, Numerical Model, Particle Flow Code, Pre-Existing Fissure, Smooth-Joint Model

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