【毕设用---外文翻译来源】ANSYS英文论文 (45).pdf

Simulation of Rock Cutting by the Finite Element
Method
Yang Shenghua
Shanghai Branch of China Coal Research Ins.
Shanghai, China
Abstract
The two dimensional simulation models of rock fragmentation due to cutting have been developed by the
finite element method (FEM) using ANSYS software, in the models the friction between the crack faces
and the tool with rock is taken into account. A special crack tip element and the surface-to-surface
contact elements are used to simulate the feature of the crack tip stress singularity. The crack tip stress
and displacement distributions can be accurately determined, and the stress intensity factor (SIF) and
strain energy release rate and strain energy density factor can be calculated accordingly. Thus the crack
initiation and propagation paths and required forces can be accurately determined by the rigorous
fracture criteria (σ- criteria, G- criteria and S- criteria).
Several studies have been made to simulate rock-cutting phenomena by fracture mechanics principles
coupled with the FEM. The cutting process of major chip formation by a drag pick cutting has simulated.
The two-crack model simulation is performed for more attempts; as a result the influence of cutting
parameter and tool geometry and friction and multi-crack in cutting process can be investigated by
simulation.
Introduction
After a l