A composite rate- and state-dependent law for rock friction
A composite rate- and state-dependent law for rock friction
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DOI：
10.1029/2000gl012060
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发表时间：
2001-03-15
影响因子：
5.2
通讯作者：
Tullis, TE
中科院分区：
文献类型：
--
作者：
Kato, N;Tullis, TE
现有的岩体构成定律无法描述在没有滑移和稳态滑动周围摩擦行为的情况下观察到的加强。结合了现有的速率和州依赖性摩擦法，我们提出了一项新的摩擦定律，该法律在小于截止速度V-C的滑动速度下表达对数时依赖时间的愈合，并在比V-C大的速度下接近所谓的滑移定律。数值模拟表明，新的摩擦定律充分解释了速度垫脚测试和滑动式扫描测试的实验结果，这些测试已广泛用于检查速度，时间和位移依赖岩体摩擦的特性。由于新的摩擦定律具有简单的形式，并且似乎适合多种条件，因此对于应用地震循环的数值建模非常有用。
Existing constitutive laws of rock friction cannot describe both observed strengthening in the absence of slip and frictional behavior around steady-state sliding. Combining existing rate- and state-dependent friction laws, we propose a new friction law which expresses logarithmically time-dependent healing at sliding velocities smaller than a cut-off velocity V-c and approaches the so-called slip law at velocities larger than V-c. Numerical simulations show that the new friction law adequately explains experimental results of velocity stepping tests and slidehold-slide tests, which have widely been used to examine velocity-, time-, and displacement-dependent property of rock friction. Because the new friction law has a simple form and appears appropriate for a wide range of conditions, it is useful for application to numerical modeling of seismic cycles.