| DOI: | 10.1002/2013GL058913
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| 论文题名: | Evolution of slip surface roughness through shear |
| 作者: | Davidesko G.; Sagy A.; Hatzor Y.H.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-10328
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| EISSN: | 1944-10059
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| 出版年: | 2014
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| 卷: | 41, 期:5 | | 起始页码: | 1492
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| 结束页码: | 1498
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| 语种: | 英语
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| 英文关键词: | direct shear
; evolution
; experiments
; fault roughness
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| Scopus关键词: | Experiments
; Hydrogen embrittlement
; Shearing
; Surface roughness
; Tensile strength
; Wavelength
; Deformation stages
; Direct shear
; evolution
; Laboratory experiments
; Measurement scale
; Roughness evolution
; Sliding velocities
; Tensile fracture surfaces
; Shearing machines
; asperity
; fault displacement
; fault slip
; power law
; shear
; surface roughness
; wavelength
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| 英文摘要: | A significant part of displacement in fault zones occurs along discrete shear surfaces. The evolution of fault surface topography is studied here in direct shear laboratory experiments. Matching tensile fracture surfaces were sheared under imposed constant normal stress and sliding velocity. The roughness evolution was analyzed using measurements of surface topography before and after slip. We show that shearing reduces the initial surface roughness at all measurement scales. At all wavelengths, the roughness ratio between initial and final roughness increases as a function of the slip distance. For a given test, the roughness ratio increases with wavelength up to a few millimeters, beyond which the ratio becomes wavelength independent. At this region the roughness measured after slip follows a power law similar to that of the initial tensile fracture surface. We interpret this geometrical evolution as a consequence of the deformation stage of interlocked asperities which is followed by shear-induced dilation. Key Points Shearing reduces the initial surface roughness at all measurement scales Initial to final roughness ratio increases as a function of the slip distance The roughness ratio for a test is wavelength independent from above a few millimeters of displacement ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84895774928&doi=10.1002%2f2013GL058913&partnerID=40&md5=e7738798de43f9d1b7f462b7a730d01e
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7592
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Geological Survey of Israel, Jerusalem, Israel
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| Recommended Citation: | |
Davidesko G.,Sagy A.,Hatzor Y.H.. Evolution of slip surface roughness through shear[J]. Geophysical Research Letters,2014-01-01,41(5).
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