Journal
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
Volume 40-41, Issue -, Pages 16-25Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijimpeng.2011.08.010
Keywords
Simulation; Autodyn; Johnson-Holmquist model; Laboratory-scale blasting; Dynamic fracture
Categories
Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Ontario Research Foundation
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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.
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