Citation

BibTex format

@inproceedings{Paluszny:2012,
author = {Paluszny, A and Tang, XH and Zimmerman, RW},
publisher = {American Rock Mechanics Association},
title = {A Multi-modal Approach to 3D Fracture And Fragmentation of Rock Using Impulse-Based Dynamics And the Finite Element Method},
year = {2012}
}

RIS format (EndNote, RefMan)

TY  - CPAPER
AB - ABSTRACT:A numerical method combining the finite element method (FEM) and impulse-based dynamics is proposed for the simulation of 3D fracture and fragmentation. As opposed to existing methods, fragments are not represented as a conglomeration of primitive shapes; instead, their geometry is represented using solid modeling techniques. This allows for continuum-mechanics-based fracture propagation analysis to be carried out within each fragment, with fragment interaction and movement simulated using impulse-based dynamics. This approach models multi-body interaction of non-convex 3D objects which fall, collide, and fragment using impulse-based dynamics, as opposed to a penalty-based method. Instead, object trajectories are used to estimate time-of-impact, and contact between bodies is modeled by collisions at contact locations. This approach allows material properties to be explicitly defined at the macro-scale. A 3D fracture engine models fracture propagation in the individual 3D continua based on local stress intensity factor measurements using the reduced virtual integration technique, as well as decoupled geometry and mesh representation, and on the evaluation of local failure and propagation criteria. Fractures that reach free boundaries lead to further fragmentation. The framework, presented as a multi-modal toolkit, is suitable for meso-scale simulations, and is demonstrated by a mining-specific block caving application. 1. INTRODUCTIONFragmentation simulation involves capturing two main processes: damage and cracking of single bodies, and dynamics/collision between fragments. The analysis of damage and cracking in single bodies includes challenges such as defining initial material properties and rock heterogeneities, crack nucleation, and propagation of multiple cracks. Modeling collisions between fragments includes capturing processes such as collision detection, force transfer due to impact and compression, and energy loss during collision. Challenges inclu
AU - Paluszny,A
AU - Tang,XH
AU - Zimmerman,RW
PB - American Rock Mechanics Association
PY - 2012///
TI - A Multi-modal Approach to 3D Fracture And Fragmentation of Rock Using Impulse-Based Dynamics And the Finite Element Method
ER -