HYBRID CONTINUUM-DISCONTINUUM MODELLING OF ROCK FRACUTRE PROCESS IN BRAZILIAN TENSILE STRENGTH TEST

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  • Huaming An School of Civil & Resource Engineering, University of Science &Technology Beijing, China
  • Hongyuan Liu School of Engineering and ICT, University of Tasmania, Australia
  • Xuguang Wang Beijing General Research Institute of Mining &Metallurgy, China
  • Jianjun Shi School of Civil & Resource Engineering, University of Science &Technology Beijing, China
  • Haoyu Han School of Engineering and ICT, University of Tasmania, Australia

DOI:

https://doi.org/10.14311/CEJ.2017.03.0021

Klíčová slova:

Hybrid Continuum-Discontinuum, Brazilian Tensile Strength Test, Rock Failure Process, Crack Initiation and Propagation

Abstrakt

A hybrid continuum-discontinuum method is introduced to model the rock failure process in Brazilian tensile strength (BTS) test. The key component of the hybrid continuum-discontinuum method, i.e. transition from continuum to discontinuum through fracture and fragmentation, is introduced in detail. A laboratory test is conducted first to capture the rock fracture pattern in the BTS test while the tensile strength is calculated according to the peak value of the loading forces. Then the proposed method is used to model the rock behaviour during BTS test. The stress propagation is modelled and compared with those modelled by finite element method in literatures. In addition, the crack initiation and propagation are captured and compared with the facture patter in laboratory test. Moreover, the force-loading displacement curve is obtained which represents a typical brittle material failure process. Furthermore, the stress distributions along the vertical direction are compared with the theoretical solution. It is concluded that the hybrid continuum-discontinuum method can model the stress propagation process and the entire rock failure process in BTS test. The proposed method is a valuable numerical tool for studying the rock behaviour involving the fracture and fragmentation processes.

Stažení

Data o stažení nejsou doposud dostupná.

Reference

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Stahování

Publikováno

2017-10-31

Jak citovat

An, H., Liu, H., Wang, X., Shi, J., & Han, H. (2017). HYBRID CONTINUUM-DISCONTINUUM MODELLING OF ROCK FRACUTRE PROCESS IN BRAZILIAN TENSILE STRENGTH TEST. Stavební Obzor - Civil Engineering Journal, 26(3). https://doi.org/10.14311/CEJ.2017.03.0021

Číslo

Vol 26 No 3 (2017)

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