DOI: 10.1002/grl.50311
论文题名: Crossover from negative to positive shear rate dependence in granular friction
作者: Kuwano O. ; Ando R. ; Hatano T.
刊名: Geophysical Research Letters
ISSN: 0094-9169
EISSN: 1944-8900
出版年: 2013
卷: 40, 期: 7 起始页码: 1295
结束页码: 1299
语种: 英语
英文关键词: constitutive law
; friction
; granular matter
; high-velocity friction
Scopus关键词: Constitutive law
; Friction coefficients
; Frictional properties
; Granular matter
; High sliding velocities
; High-velocity frictions
; Low effective pressures
; Shear-rate dependence
; Shear deformation
; Tribology
; Friction
; anelasticity
; friction
; shear
; sliding
; velocity
英文摘要: The frictional properties of granular matter are important for analyzing various phenomena in geosciences. Here, we conduct an experiment on the shear-rate dependence of the friction coefficient, which determines the stability of granular flow. By changing the shear rate over four orders of magnitude, we find the characteristic rate at which the least friction is realized associated with the crossover from negative to positive shear rate dependence. The least friction is explained in terms of the competition between two very different physical processes, namely frictional healing and anelasticity. We determine the expression of the characteristic shear rate, which is proportional to the square root of the normal stress. Key Points Velocity strengthening at high sliding velocities and low effective pressures A constitutive law describing both the pressure and rate dependences The characteristic shear rate at which the least friction is realized ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876901018&doi=10.1002%2fgrl.50311&partnerID=40&md5=967e9e368188a81020d00cbd165106a1
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6433
Appears in Collections: 气候减缓与适应
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作者单位: Institute for Research on Earth Evolution, Japan Agency for Marine- Earth Science and Technology, 3173-25 Showa-machi, Kanazawa-ku, Yokohama 236-0001, Japan
Recommended Citation:
Kuwano O.,Ando R.,Hatano T.. Crossover from negative to positive shear rate dependence in granular friction[J]. Geophysical Research Letters,2013-01-01,40(7).