Numerical simulation of stress wave induced fractures in rock

被引:262
作者
Banadaki, M. M. Dehghan [1 ]
Mohanty, B.
机构
[1] Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Simulation; Autodyn; Johnson-Holmquist model; Laboratory-scale blasting; Dynamic fracture; HIGH-STRAIN RATES; ALUMINUM NITRIDE; HIGH-PRESSURES; CARBIDE; IMPACT;
D O I
10.1016/j.ijimpeng.2011.08.010
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Blast-induced fracture networks largely control the degree of rock fragmentation and final outcome of blasting operations. Precise laboratory-scale single-hole blast experiments have been carried out in cylindrical samples of a well-characterized granitic rock to study stress wave induced fracture patterns. The rock samples measured 144 mm in diameter and 150 mm in length. Detonating cord was employed as the explosive source in the centrally loaded boreholes in the rock samples. In this paper, the measured mechanical properties, experienced peak pressure values inside the rock samples and blast-induced fracture patterns are used to find the parameters of Johnson-Holmquist model in ANSYS AUTODYN. The resulting numerical fracture patterns are comparable to those obtained from experiments at macro-scale level. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:16 / 25
页数:10
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