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首页> 外文期刊>Geodinamica Acta >Stress partitioning: a practical concept for analysing boundary conditions of brittle deformation
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Stress partitioning: a practical concept for analysing boundary conditions of brittle deformation

机译：应力分配：分析脆性变形边界条件的实用概念

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摘要

Although conjugate fault systems cannot accommodate three-dimensional strain, the notion of stress-driven fracturing based upon Mohr-Coulomb's failure criterium can be reconciled with any kinematic boundary condition if a non-static scenario is considered. The concept of stress partitioning is proposed as a tool for understanding the mechanisms allowing such compatibility. It describes stress changes that occur in response to failure events, giving the appearance that the total stress field is decoupled into distinct, independent components. It can be mainly applied to biaxial horizontal loading conditions (e.g. multidirectional tension or multidirectional compression in intraplate regions). Swapping of horizontal stress axes, caused by stress drop subsequent to failure, can result in two distinct stress events and two, either tensile or shear fracture systems with nearly orthogonal strikes. Each fracture event develops according to Mohr-Coulomb's and Griffith's failure criteria, but the resulting overall deformation is three-dimensional.
机译：尽管共轭断层系统不能适应三维应变，但是如果考虑非静态情况，则基于Mohr-Coulomb破坏准则的应力驱动压裂概念可以与任何运动学边界条件相协调。提出了应力分配的概念，作为理解允许这种兼容性的机制的工具。它描述了响应故障事件而发生的应力变化，从而使总应力场看上去分离为不同的独立组件。它可以主要应用于双轴水平加载条件（例如板内区域中的多向拉伸或多向压缩）。由破坏后的应力下降引起的水平应力轴交换会导致两个明显的应力事件，以及两个具有几乎正交的走向的拉伸或剪切断裂系统。每个断裂事件均根据Mohr-Coulomb's和Griffith的破坏准则发展，但最终的整体变形是三维的。

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