Numerical Simulation of Rock Breaking by Disc Cutter of Tunnel Boring Machine

Qi Xing Wu; Guang Feng An; Xiao Wen Zhou; Lin Chen

doi:10.4028/www.scientific.net/AMM.638-640.888

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 638-640Numerical Simulation of Rock Breaking by Disc...

Numerical Simulation of Rock Breaking by Disc Cutter of Tunnel Boring Machine

Abstract:

By using the explicit nonlinear dynamic analysis program of LS-DYNA, three-dimension finite element model of rock breaking by disc cutter of tunnel boring machine is established, in which elastic material is adopted to describe the elastic behavior of cutter ring and Holmguist Johnson Concrete (HJC) model is adopted to describe the brittle behavior of rock. With the finite element method, the process of rock breaking by disc cutter is simulated, and then the movement characteristics, forces of disc cutter and rock fragmentation mechanism are analyzed. The results indicate that the numerical technique can contribute to gaining an understanding of rock breaking mechanism by disc cutter and improving the design of disc cutter parameters.

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Periodical:

Applied Mechanics and Materials (Volumes 638-640)

Pages:

888-893

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.638-640.888

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Online since:

September 2014

Authors:

Qi Xing Wu, Guang Feng An, Xiao Wen Zhou, Lin Chen

Keywords:

Disc Cutter, LS-DYNA, Numerical Simulation, Rock breaking

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