Stick-slip dynamics in the relaxation of stresses in a continuous elastic medium.
Stick-slip dynamics in the relaxation of stresses in a continuous elastic medium.
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连续弹性介质中应力松弛的粘滑动力学。
DOI：
10.1103/physreve.50.1000
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
Galeano
中科院分区：
文献类型：
--
作者：
Rubió;Galeano
本文报道了一个类地震动力学模型系统中应力松弛动力学行为的实验结果。在实验中，连续的弹性介质，即透明凝胶，在两个同轴圆柱之间以非常慢的速率剪切。局部的应力松弛研究通过光弹性技术。第六章给出了四种不同的粘滑动力机制。其中三个是让人想起的BurridgeKnopoff模型的不稳定的解决方案：滑动，全球松弛，和孤子传播的解决方案。第四个政权表现出复杂的时空行为，涉及各种规模的事件。对于最后一种行为，事件持续时间、事件间隔和幅度的统计数据显示指数行为。
We report on experimental results on the dynamical behavior of the stress relaxation in a model system for earthquakelike dynamics. In the experiments, a continuous elastic medium, namely, a transparent gel, is sheared at a very slow rate in between two coaxial circular cylinders. The stress relaxations are investigated locally by means of photoelastic techniques. We 6nd four different stickslip dynamical regimes. Three of them are reminiscent of the unstable solutions of the BurridgeKnopoff model: the sliding, the global relaxation, and the solitonlike propagating solutions. The fourth regime shows complex spatiotemporal behavior involving events of all sizes. For this last type of behavior the statistics of event duration, event separation, and amplitude show exponential behavior.