DOI: 10.1002/2014GL060713
论文题名: Stationary points in activation energy for heat dissipated with a power law temperature-dependent viscoelastoplastic rheology
作者: So B.-D. ; Yuen D.A.
刊名: Geophysical Research Letters
ISSN: 0094-9931
EISSN: 1944-9662
出版年: 2014
卷: 41, 期: 14 起始页码: 4953
结束页码: 4960
语种: 英语
英文关键词: activation energy
; planetary-scale failure
; power law rheology
; shear heating
Scopus关键词: Elasticity
; Geodynamics
; Silicate minerals
; Initial temperatures
; Maximum dissipations
; Power-law rheology
; Predictive capabilities
; Shear heating
; Temperature dependent
; Two dimensional model
; Viscoelasto plastics
; Activation energy
; activation energy
; boundary condition
; heat flow
; mechanical property
; nonlinearity
; optimization
; plate tectonics
; power law
; rheology
; shear zone
; viscoelasticity
英文摘要: We report that there exist a local maximum and minimum in the activation energy Ea describing mechanical heat dissipation of olivine for a given initial temperature and amount of deformation. The stationary point for the minimum dissipation is ~200 kJ/mol lower than that for the maximum. For larger activation energy than the stationary point for maximum dissipation, plastic deformation is sharply weakened and the temperature rise disappears altogether. Higher values of the initial temperature produce a larger local maximum for activation energy. The amount of heat dissipation increases with Ea in a nonlinear manner. Our results have direct ramifications on shear zone, which is governed by the amount of mechanical heat dissipation. We have observed them over a wide range of temperature and deformation boundary conditions. Our two-dimensional model study can provide valuable insight to enable greater predictive capability for the development of geodynamic shear zone in planetary-scale plate tectonics. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904714977&doi=10.1002%2f2014GL060713&partnerID=40&md5=89b140576d66fee1c60e9bd8458eb63a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7195
Appears in Collections: 气候减缓与适应
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作者单位: School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea
Recommended Citation:
So B.-D.,Yuen D.A.. Stationary points in activation energy for heat dissipated with a power law temperature-dependent viscoelastoplastic rheology[J]. Geophysical Research Letters,2014-01-01,41(14).