ORCID Profile
0000-0002-2431-3656
Current Organisation
Nanyang Technological University
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Publisher: Thomas Telford Ltd.
Date: 06-2016
Abstract: A comprehensive investigation of grain effect (size and distribution) in discrete element modelling of intact rock is carefully conducted through simulating Brazilian disc and uniaxial compressive tests on an intact rock using Universal Distinct Element Code. All the investigations are performed based on the same group of material parameters. Six sizes of Voronoi tessellation grains ranging from 1 to 6 mm are investigated. To investigate the influence of grain assemblage distribution, five different polygonal grain assemblages are created and tested for uniaxial compression and Brazilian disc tests. The simulation results demonstrate that grain size and assemblage distribution play a significant role in the numerical modelling of intact rock using discrete element method. It is found that larger particle size produces higher stiffness and strength. It is also observed that a more homogeneous model can produce higher strength (compressive strength, tensile strength). The modelled Young's modulus and Poisson's ratio have been demonstrated to be dependent on the grain effect.
Publisher: Springer Science and Business Media LLC
Date: 30-05-2017
Publisher: Elsevier BV
Date: 03-2016
Publisher: Elsevier BV
Date: 10-2017
Publisher: Elsevier BV
Date: 12-2018
Publisher: Elsevier BV
Date: 04-2016
Publisher: Elsevier BV
Date: 06-2018
Publisher: Trans Tech Publications, Ltd.
Date: 12-2016
DOI: 10.4028/WWW.SCIENTIFIC.NET/KEM.725.162
Abstract: Rock movement caused by external explosion loading can damage the nearby tunnel or cavern.To avoid damage, energy absorbing bolts with high load-displacement and large energy absorptioncapacities are required. The deformation and friction of the bolt absorb energy during the rock movementand preventing the structure from damage. To maximize the energy absorption capacity in the limitedspace inside the borehole, we developed a new bolt that utilizes the friction and plastic deformation ofthe sleeve. To develop the new bolt, FE simulation in Abaqus was used to improve designs beforefabrication. Two prototypes of the new design was fabricated and tested by static pull test. The resultsshowed the bolts yielded in the desired way. The experimental results prove the new bolt is capable ofabsorbing large amount of energy and accommodating large displacement.
Publisher: Elsevier BV
Date: 10-2017
Publisher: American Society of Civil Engineers (ASCE)
Date: 06-2018
Publisher: Elsevier BV
Date: 11-2018
Publisher: Elsevier BV
Date: 02-2017
Publisher: Elsevier BV
Date: 2017
Publisher: Elsevier BV
Date: 08-2018
Publisher: Elsevier BV
Date: 2018
Publisher: American Society of Civil Engineers
Date: 12-05-2006
DOI: 10.1061/40862(194)33
Publisher: Springer Science and Business Media LLC
Date: 30-04-2016
No related grants have been discovered for Zhiye Zhao.