气候变化领域集成服务门户(CCPortal): Toward Robust and Predictive Geodynamic Modeling: The Way Forward in Frictional Plasticity

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DOI	10.1029/2019GL086027
	Toward Robust and Predictive Geodynamic Modeling: The Way Forward in Frictional Plasticity
	Duretz T.; de Borst R.; Yamato P.; Le Pourhiet L.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:5
英文摘要	Strain localization is a fundamental characteristic of plate tectonics. The resulting deformation structures shape the margins of continents and the internal structure of tectonic plates. To model the occurrence of faulting, geodynamic models generally rely on frictional plasticity. Frictional plasticity is normally embedded in visco-plastic (V-P) or visco-elasto-plastic (V-E-P) rheologies. This poses some fundamental issues, such as the difficulty, or often inability, to obtain a converged equilibrium state and a severe grid sensitivity. Here, we study shear banding at crustal-scale using a visco-elasto-viscoplastic (V-E-VP) model. We show that this rheology allows to accurately satisfy equilibrium, leads to shear band patterns that converge upon mesh refinement, and preserves characteristic shear band angles. Moreover, a comparison with analytic models and laboratory data reveals that V-E-VP rheology captures first-order characteristics of frictional plasticity. V-E-VP models thus overcomes limitations of V-P and V-E-P models and appears as an attractive alternative for geodynamic modeling. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Elasticity; Faulting; Friction; Numerical models; Plasticity; Plates (structural components); Rheology; Shear bands; Tectonics; Deformation structure; Elasto-viscoplastic; Fundamental characteristics; Geodynamic modeling; Geodynamic models; Internal structure; Shear band patterns; Strain localizations; Geodynamics; deformation; faulting; geodynamics; numerical model; plasticity; plate tectonics; rheology
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170590
作者单位	Univ Rennes, CNRS, Géosciences Rennes UMR 6118, Rennes, France; Institut des Sciences de la Terre, University of Lausanne, Lausanne, Switzerland; Department of Civil and Structural Engineering, University of Sheffield, Sheffield, United Kingdom; Institut Universitaire de France (IUF), Paris, France; Sorbonne Universités, UPMC Univ Paris 06, CNRS, Institut des Sciences de la Terre de Paris (iSTeP), Paris, France
推荐引用方式 GB/T 7714	Duretz T.,de Borst R.,Yamato P.,et al. Toward Robust and Predictive Geodynamic Modeling: The Way Forward in Frictional Plasticity[J],2020,47(5).
APA	Duretz T.,de Borst R.,Yamato P.,&Le Pourhiet L..(2020).Toward Robust and Predictive Geodynamic Modeling: The Way Forward in Frictional Plasticity.Geophysical Research Letters,47(5).
MLA	Duretz T.,et al."Toward Robust and Predictive Geodynamic Modeling: The Way Forward in Frictional Plasticity".Geophysical Research Letters 47.5(2020).