Numerical analysis of blast-induced wave propagation and spalling damage in a rock plate |
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Authors: | Zhi-liang Wang Yong-chi Li JG Wang |
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Affiliation: | aDepartment of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230027, China;bCentre for Protective Technology, National University of Singapore, 10 Kent Ridge Crescent 119260, Singapore |
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Abstract: | The paper focuses on the numerical analysis of blast-induced stress wave propagation and related spalling damage in a rock plate or wall. Firstly, a large-scale contact explosion is simplified as a one-dimensional (1-D) strain problem, and a cross-format centered finite-difference scheme is presented. Secondly, the finite-difference code is used to explore the wave propagation in a rock plate, and compared with the commercial software LS-DYNA. Thirdly, a continuum damage constitutive model for rock is introduced and successfully incorporated into the LS-DYNA through its user-defined subroutine. Coupling with the erosion technique, the improved LS-DYNA is used to simulate the blast-induced spalling damage at the back-side of rock plate. Numerical results show that the 1-D finite difference code is convenient and accurate. Also, the user-defined subroutine can well describe the process of spalling damage. |
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Keywords: | Rock plate Contact explosion 1-D strain wave Finite difference method Damage model Erosion technique Spalling damage |
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