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  A micromechanical analysis of marble pulverization under quasi-static progressive cyclic loading

Fu, B., Li, Y., Tang, C., Ji, Y., Zang, A. (2024): A micromechanical analysis of marble pulverization under quasi-static progressive cyclic loading. - International Journal of Rock Mechanics and Mining Sciences, 179, 105786.
https://doi.org/10.1016/j.ijrmms.2024.105786

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 Creators:
Fu, Bin1, Author
Li, Yingchun1, Author
Tang, Chun'an1, Author
Ji, Yinlin1, Author
Zang, Arno2, Author              
Affiliations:
1External Organizations, ou_persistent22              
22.6 Seismic Hazard and Risk Dynamics, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146032              

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Free keywords: Marble Strengthening Pulverization Progressive cyclic loading
 Abstract: Highly fragmented rocks (i.e., pulverized rocks) in the fault damage zone presumably develop during co-seismic deformation processes. These pulverized rocks close to the fault core are generally thought to originate from high strain rates, whereas the genesis of pulverized rocks that can be found several hundred meters away from the fault core – where quasi-static conditions prevail – remains unclear. We thus conducted uniaxial cyclic loading experiments with axial strain rate of ∼10−3 s−1 on Leiyang marble in a stress-controlled manner in order to produce crushed rocks for analysis. We found that cyclic loading between 0.8 σc and 1.3 σc can simultaneously compact pre-existing cracks and generated new cracks in marble, which strengthened and stiffened the rock. The stiffened marble developed a higher crack density and energy density before rupture, thereby facilitating rock fragmentation compared with the reference sample, which was fractured monotonically in one cycle. Our results provide a plausible explanation for the genesis of pulverized marble at quasi-static strain rate in the field.

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Language(s): eng - English
 Dates: 20242024
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.ijrmms.2024.105786
GFZPOF: p4 T8 Georesources
GFZPOFWEITERE: p4 T3 Restless Earth
 Degree: -

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Title: International Journal of Rock Mechanics and Mining Sciences
Source Genre: Journal, SCI, Scopus
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Pages: - Volume / Issue: 179 Sequence Number: 105786 Start / End Page: - Identifier: CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals227
Publisher: Elsevier