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3-D dimensional numerical simulation of soft rock cutting process(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2010年04期
Page:
102-106
Research Field:
Publishing date:
2010-08-20

Info

Title:
3-D dimensional numerical simulation of soft rock cutting process
Author(s):
XIA Yi-min1; 2;  XUE Jing1;  ZHOU Xi-wen1
1. Key Laboratory for Modern Complex Equipment Design and Extreme Manufacturing of Ministry of Education, Central South University, Changsha 410083, Hunan, China; 2. School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China
Keywords:
mechanical engineering;  shield;  soft rock;  cutting;  ANSYS/LS-DYNA
PACS:
TP391.9
DOI:
-
Abstract:
Applying cutting kinetic theory and finite element theory, choosing four parameters in the Ottosen failure criterion the introduction of damage factor of elastic-plastic constitutive model for soft rock material model, taking on friction between the soft rock and cutter in the cutting process, based on ANSYS / LS-DYNA with large-scale nonlinear dynamic finite element software, the method is used to simulate soft rock cutting process by shield cutter so as to investigate how the maximum principal stress of soft rock and cutting force of cutter change in the whole process. The simulation results show that when squeezed by the cutter until reaching the yield strength, soft rock occurs plastic deformation and results in cracks. Throughout the whole process, the rock is subject to a reduction in the cycle of increasing pressure and cutting force presents of a serious nature of volatility. Compared with experimental result, the simulation values are in good agreement with the test values, this numerical method shows that the validity of numerical analysis is effective, then it can be used to further study of shield cutter rock breaking theory, and provide a reliable theoretical basis for designing and improving shield cutter. 7 figs, 10 refs.

References:

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Last Update: 2010-08-20