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Hybrid finite-discrete modelling of dynamic fracture of rock under impact loads and resultant fragment grinding

Citation

Liu, HY and An, HM, Hybrid finite-discrete modelling of dynamic fracture of rock under impact loads and resultant fragment grinding, Proceedings of the International Conference on Geomechanics, Geo-energy and Geo-resources (IC3G 2016), 28-29 September 2016, Melbourne, Australia, pp. 1-8. ISBN 9780995392908 (2016) [Refereed Conference Paper]


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Abstract

A loading rate-dependent strength equation is implemented into a hybrid finite-discrete element method to model dynamic fracture of rock under impact loads and resultant fragment grinding. The hybrid method is firstly calibrated by modelling the dynamic fracture of rock in the dynamic Brazilian tensile strength tests and comparing the modelled dynamic fracture process and dynamic strength increasing factors with those in literatures. The hybrid method is then applied to study dynamic fracture and resultant fragment grinding in the dynamic shear test of rock joints under various loading rates. Finally, it is concluded that the hybrid finite-discrete element method is a valuable tool to study rock dynamic fracture and fragment grinding.

Item Details

Item Type:Refereed Conference Paper
Keywords:hybrid FEM-DEM, dynamic fracture, fragment grinding, impact load, numerical methods
Research Division:Engineering
Research Group:Civil Engineering
Research Field:Civil Geotechnical Engineering
Objective Division:Construction
Objective Group:Construction Processes
Objective Field:Civil Construction Processes
Author:Liu, HY (Dr Hong Liu)
Author:An, HM (Mr Huaming An)
ID Code:114734
Year Published:2016
Deposited By:Engineering
Deposited On:2017-02-24
Last Modified:2017-07-25
Downloads:0

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