Abstract
The sequence of rock failure mechanisms and quantitative information on stress, displacement and material failure in the process of bit penetration have been obtained through computer simulation. A finite element approach has been developed to simulate bit penetration from bit-rock interaction to chip formation. A mathematical rock failure model, based on available rock failure experiments, has been proposed to represent post-failure rock behavior and applied in the penetration simulations. The finite element code was developed for two-dimensional plane strain problems to consider non-linear material properties, geometric non-linearity, and fracture propagation. An anistropic element as well as variable stiffness and stress release methods have been used. An iteration method, using an incremental displacement approach, has been applied for continuous penetration with modification of material properties and displacements. The simulation results of the blunt point bit are in reasonable agreement with penetration experiments on Limestone. Wedge and cylinder bit profiles have also been presented to demonstrate their shape effects. © 1976.
Recommended Citation
J. K. Wang and T. F. Lehnhoff, "Bit Penetration Into Rock-A Finite Element Study," International Journal of Rock Mechanics and Mining Sciences and, vol. 13, no. 1, pp. 11 - 16, Elsevier, Jan 1976.
The definitive version is available at https://doi.org/10.1016/0148-9062(76)90222-9
Department(s)
Mechanical and Aerospace Engineering
International Standard Serial Number (ISSN)
0148-9062
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2023 Elsevier, All rights reserved.
Publication Date
01 Jan 1976
