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DOI	10.1029/2020JB020539
	A Model of Failure and Localization of Basalt at Temperature and Pressure Conditions Spanning the Brittle-Ductile Transition
	Parisio F.; Lehmann C.; Nagel T.
发表日期	2020
ISSN	21699313
卷号	125 期号:11
英文摘要	Natural phenomena such as seismicity, volcanism, and fluid circulation in volcanic areas are influenced by the mechanical response of intact basalt. When subjected to a wide range of environmental loading conditions, basalt exhibits inelastic deformation characteristics ranging from brittle to ductile behavior. In this manuscript, we present a new constitutive model of basalt that spans the brittle-ductile transition by covering a wide range of mean effective stress, temperature, and strain rate. The model has been implemented into the automatic constitutive model code generator MFront, which we have coupled with the finite element solver OpenGeoSys. The software employed for the computations is open source, accessible and offers a versatile solution to model thermomechanical failure of rocks. Within this framework, we have performed numerical simulations that highlight the localization of strains and stresses under triaxial compression. Predictions of the constitutive response, of the depth of the brittle-ductile transition, and of the localization patterns are in agreement with laboratory and in situ observations. The results have important geophysical implications as they provide a constitutive basis that explains the mechanisms through which basalt can deform in a brittle fashion at temperatures above 600°C. ©2020. The Authors.
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187504
作者单位	Chair of Soil Mechanics and Foundation Engineering, Technische Universität Bergakademie Freiberg, Freiberg, Germany; TUBAF-UFZ Center for Environmental Geosciences, Freiberg, Germany; Department of Environmental Informatics, Helmholtz Centre for Environmental Research-UFZ, Leipzig, Germany
推荐引用方式 GB/T 7714	Parisio F.,Lehmann C.,Nagel T.. A Model of Failure and Localization of Basalt at Temperature and Pressure Conditions Spanning the Brittle-Ductile Transition[J],2020,125(11).
APA	Parisio F.,Lehmann C.,&Nagel T..(2020).A Model of Failure and Localization of Basalt at Temperature and Pressure Conditions Spanning the Brittle-Ductile Transition.Journal of Geophysical Research: Solid Earth,125(11).
MLA	Parisio F.,et al."A Model of Failure and Localization of Basalt at Temperature and Pressure Conditions Spanning the Brittle-Ductile Transition".Journal of Geophysical Research: Solid Earth 125.11(2020).