Study on size and load rate effect of dynamic fragmentation and mechanical properties of marble sphere

Zhao, R; Tao, M; Wu, C; Li, X; Wang, S

Study on size and load rate effect of dynamic fragmentation and mechanical properties of marble sphere

Zhao, R Tao, M Wu, C

Li, X Wang, S

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Engineering Failure Analysis, 2022, 142, pp. 106814
Issue Date:: 2022-12-01

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Field	Value	Language
dc.contributor.author	Zhao, R
dc.contributor.author	Tao, M
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934
dc.contributor.author	Li, X
dc.contributor.author	Wang, S
dc.date.accessioned	2023-03-26T21:38:26Z
dc.date.available	2023-03-26T21:38:26Z
dc.date.issued	2022-12-01
dc.identifier.citation	Engineering Failure Analysis, 2022, 142, pp. 106814
dc.identifier.issn	1350-6307
dc.identifier.uri	http://hdl.handle.net/10453/168422
dc.description.abstract	Impact-induced fragmentation of rock blocks is a frequent phenomenon during rockfall, mining, geotechnical engineering. In order to obtain the fragmentation characteristics of rocks under the action of impact, the marble spheres with diameters of 30, 35, 40, 45, and 50 mm were used for paired-impact using the Split Hopkinson Pressure Bar (SHPB) tests, at the impact velocities of 4.5, 7.4 and 11.2 m/s, respectively, and the corresponding load and failure characteristics of each sample were examined. The experimental results revealed that the peak loading capacity and fragmentations of the rock sphere was influenced by the sample size and impact velocity. The finite element method (FEM) simulation by LS-DYNA was carried out to reveal the failure mechanism of marble spheres under paired-impact. Finally, a theoretical model was proposed to evaluating the breakage of rock block under impact. The results can be used to guide rock breakage in mines and rockfall hazard protection.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Engineering Failure Analysis
dc.relation.isbasedon	10.1016/j.engfailanal.2022.106814
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0912 Materials Engineering, 0913 Mechanical Engineering
dc.subject.classification	Mechanical Engineering & Transports
dc.title	Study on size and load rate effect of dynamic fragmentation and mechanical properties of marble sphere
dc.type	Journal Article
utslib.citation.volume	142
utslib.for	0905 Civil Engineering
utslib.for	0912 Materials Engineering
utslib.for	0913 Mechanical Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access	*
dc.date.updated	2023-03-26T21:38:24Z
pubs.publication-status	Published
pubs.volume	142

Abstract:

Impact-induced fragmentation of rock blocks is a frequent phenomenon during rockfall, mining, geotechnical engineering. In order to obtain the fragmentation characteristics of rocks under the action of impact, the marble spheres with diameters of 30, 35, 40, 45, and 50 mm were used for paired-impact using the Split Hopkinson Pressure Bar (SHPB) tests, at the impact velocities of 4.5, 7.4 and 11.2 m/s, respectively, and the corresponding load and failure characteristics of each sample were examined. The experimental results revealed that the peak loading capacity and fragmentations of the rock sphere was influenced by the sample size and impact velocity. The finite element method (FEM) simulation by LS-DYNA was carried out to reveal the failure mechanism of marble spheres under paired-impact. Finally, a theoretical model was proposed to evaluating the breakage of rock block under impact. The results can be used to guide rock breakage in mines and rockfall hazard protection.

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http://hdl.handle.net/10453/168422