The importance of stress percolation patterns in rocks and other polycrystalline materials.
The importance of stress percolation patterns in rocks and other polycrystalline materials.
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DOI：
10.1038/ncomms3117
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发表时间：
2013
影响因子：
16.6
通讯作者：
Burnley, P. C.
中科院分区：
文献类型：
--
作者：
Burnley, P. C.
在理解岩石和其他非均质多晶材料的应力传递模式的基础上，提出了一种新的思考岩石和其他非均质多晶材料变形行为的框架。在这里，使用有限元模型，我展示了应力渗透通过多晶材料，这些材料具有与岩石中发现的相同顺序的非均匀弹性和塑性特性。应力渗流模式与骨料中组成颗粒弹塑性性能的非均质性和统计分布有关。这些应力模式的发展直接导致剪切局部化，它们的存在提供了对岩石在变形过程中发生反应或溶解的韵律特征形成的洞察，如成分带和片理。此外，该框架为理解和预测基于单晶弹塑性力学性能的多晶材料宏观流变学提供了基础。所有的岩石都有图案，但它们是如何形成的尚不清楚。在这里，有限元模型被用来显示弹性模量的粒间变化导致应力在多晶材料中渗透，导致剪切局部化，并为岩石的片理发育提供了模板。
A new framework for thinking about the deformation behavior of rocks and other heterogeneous polycrystalline materials is proposed, based on understanding the patterns of stress transmission through these materials. Here, using finite element models, I show that stress percolates through polycrystalline materials that have heterogeneous elastic and plastic properties of the same order as those found in rocks. The pattern of stress percolation is related to the degree of heterogeneity in and statistical distribution of the elastic and plastic properties of the constituent grains in the aggregate. The development of these stress patterns leads directly to shear localization, and their existence provides insight into the formation of rhythmic features such as compositional banding and foliation in rocks that are reacting or dissolving while being deformed. In addition, this framework provides a foundation for understanding and predicting the macroscopic rheology of polycrystalline materials based on single-crystal elastic and plastic mechanical properties. All rocks contain patterns, but how they form is not clear. Here, finite element models are used to show that grain-to-grain variations in elastic moduli cause stress to percolate in polycrystalline materials, causing shear localization and providing a template for foliation development in rocks.
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DOI：
10.1098/rsta.2007.0004
发表时间：
2007-12-15
影响因子：
5
作者：
Antony, S. J.
通讯作者：
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影响因子：
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作者：
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影响因子：
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DOI：
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发表时间：
2011-01-01
期刊：
DEFORMATION MECHANISMS, RHEOLOGY AND TECTONICS: MICROSTRUCTURES, MECHANICS AND ANISOTROPY
影响因子：
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作者：
Farla, R. J. M.;Gerald, J. D. Fitz;Jackson, I.
通讯作者：
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影响因子：
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作者：
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通讯作者：
Sauzay, Maxime