气候变化领域集成服务门户(CCPortal): The Brittle-Ductile Transition in Porous Limestone: Failure Mode, Constitutive Modeling of Inelastic Deformation and Strain Localization

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DOI	10.1029/2020JB021602
	The Brittle-Ductile Transition in Porous Limestone: Failure Mode, Constitutive Modeling of Inelastic Deformation and Strain Localization
	Baud P.; Hall S.; Heap M.J.; Ji Y.; Wong T.-F.
发表日期	2021
ISSN	21699313
卷号	126 期号:5
英文摘要	Understanding of the mechanics of the brittle-ductile transition (BDT) in porous limestone is significantly more challenging than for sandstone because of the lack of consistent acoustic emission activity in limestone, meaning that one must rely on alternative techniques. In this paper, we investigate systematically the failure modes in Indiana limestone using X-ray microComputed Tomography imaging (μCT) and Digital Volume Correlation (DVC). Our new mechanical data show that the envelope for the onset of shear-enhanced compaction can be well approximated by an elliptical cap. The DVC analysis revealed the development of shear bands through the BDT, but no evidence of compaction bands. The shear band angles were between 29° and 46° with respect to the maximum principal stress. Compiling these new results with published data on Purbeck and Leitha limestones, we showed that inelastic compaction in each of these dual porosity allochemical limestones was in a good agreement with the normality condition, as defined in plasticity theory. Comparison of the observed failure modes with predictions based on bifurcation analysis showed that the shear band angles are consistently smaller than the theoretical predictions. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	carbonates; dual porosity; plasticity theory; shear bands
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/187135
作者单位	Université de Strasbourg, CNRS, Institut Terre et Environnement de Strasbourg, Strasbourg, France; Division of Solid Mechanics, Lund University, Lund, Sweden; Lund Institute of Neutron and X-ray Science, Lund, Sweden; State Key Laboratory of Earthquake Dynamics, Institute of Geology, Beijing, China; HPT Laboratory, Department of Earth Sciences, Utrecht University, Utrecht, Netherlands; Earth System Science Programme, Faculty of Science, The Chinese University of Hong Kong, Hong Kong
推荐引用方式 GB/T 7714	Baud P.,Hall S.,Heap M.J.,et al. The Brittle-Ductile Transition in Porous Limestone: Failure Mode, Constitutive Modeling of Inelastic Deformation and Strain Localization[J],2021,126(5).
APA	Baud P.,Hall S.,Heap M.J.,Ji Y.,&Wong T.-F..(2021).The Brittle-Ductile Transition in Porous Limestone: Failure Mode, Constitutive Modeling of Inelastic Deformation and Strain Localization.Journal of Geophysical Research: Solid Earth,126(5).
MLA	Baud P.,et al."The Brittle-Ductile Transition in Porous Limestone: Failure Mode, Constitutive Modeling of Inelastic Deformation and Strain Localization".Journal of Geophysical Research: Solid Earth 126.5(2021).