Numerical modeling of fracture behaviour of sandy mudstone under impact loading

L. X. Xie, W. B. Lu, Q.H. Jiang, Q. B. Zhang, L. He

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

Abstract

In the construction of rock engineering, the soft rock tunnel is generally excavated using the drilling and blasting method, and thus the rock mass is subjected to dynamic loading. The fracture behavior of rock mass under dynamic loading is different from that under static loading. In order to investigate fracture behaviour of sandy mudstone subjected to dynamic loading, both experiments and numerical simulations are performed at different impact velocities, respectively. Experiments are carried out with the Split Hopkinson Pressure Bar (SHPB), and numerical simulation is conducted using Holomquist-Johnson-Cook (HJC) model incorporated in the software LS-DYNA. Numerical results are in good agreement with experimental data. According to the normal stress, maximum shear stress and transversal strain distribution, the fracture process is analyzed through simulation. It is found that soft rock materials have at least two failure modes instead of a single failure mode. The fracture mechanism of sandy mudstone is mainly governed by the shear and tension failure.

Original languageEnglish
Title of host publicationRock Dynamics: From Research to Engineering
Subtitle of host publication2nd International Conference on Rock Dynamics and Applications, (ROCDYN-2), 18-19 May 2016, Suzhou, China
EditorsHaibo Li, Jianchun Li, Qianbing Zhang, Jian Zhao
Place of PublicationLeiden The Netherlands
PublisherCRC Press
Pages381-388
Number of pages8
ISBN (Electronic)9781315470818
ISBN (Print)9781138029538
Publication statusPublished - 2016
EventInternational Conference on Rock Dynamics and Applications (RocDyn) 2016 - Suzhou, China
Duration: 18 May 201620 May 2016
Conference number: 2nd
https://www.isrm.net/conferencias/detalhes.php?id=3335&show=conf

Seminar

SeminarInternational Conference on Rock Dynamics and Applications (RocDyn) 2016
Abbreviated titleRocDyn 2016
CountryChina
CitySuzhou
Period18/05/1620/05/16
Internet address

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