Steady shear and thermal run-away in clayey gouges
Steady shear and thermal run-away in clayey gouges
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粘土质凿岩中的稳定剪切和热失控
DOI：
10.1016/s0020-7683(02)00179-8
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发表时间：
2002
影响因子：
3.6
通讯作者：
I. Vardoulakis
中科院分区：
文献类型：
--
作者：
I. Vardoulakis
本文研究了剪切作用下黏性断裂带的热粘塑性耦合。结果表明，应变速率硬化/热软化粘土只有在环境温度低于某个明确的临界值时才有可能发生稳定剪切。超过这个临界温度，粘性强化和热软化这两种对抗机制之间的平衡就不能维持，并可能导致动态（灾难性）剪切变形。
In the present paper we study the thermo-viscoplastic coupling in clayey fault-gouges under shear. It is shown that steady shear for a strain-rate hardening/thermally softening clay is only then possible, if the ambient temperature is less than some well-defined critical value. Past this critical temperature the balance between the two antagonistic mechanisms of viscous strengthening and thermal softening cannot be sustained and may result in dynamic (catastrophic) shear deformation.