We perform numerical experiments of damped quasi-dynamic fault slip that include a rate-and-state behavior at steady state to simulate earthquakes and a plastic rheology to model permanent strain. The model shear zone has a finite width which represents a natural fault zone. Here we reproduce fast and slow events that follow theoretical and observational scaling relationships for earthquakes and slow slip events (SSEs). We show that the transition between fast and slow slip occurs when the friction drop in the shear zone is equal to a critical value, Δμ_c. With lower friction drops, SSEs use nearly all of mechanical work to accumulate inelastic strain, while with higher friction drops fast slips use some of the mechanical work to slip frictionally. Our new formulation replaces the state evolution of rate and state by the stress evolution concurrent with accumulation of permanent damage in and around a fault zone.

中文翻译：

---

用塑料配方模拟有限厚度剪切带中的滑动瞬变和地震。

我们进行了阻尼准动态断层滑动的数值实验，其中包括稳态下的速率和状态行为（用于模拟地震）和塑性流变（用于模拟永久应变）。模型剪切带具有代表自然断层带的有限宽度。在这里，我们再现了地震和慢滑事件（SSE）遵循理论和观测尺度关系的快和慢事件。我们表明，当在剪切区中的摩擦降等于临界值时，会发生Δμ快速和慢速之间滑动的过渡_Ç。摩擦降较低时，SSE几乎利用所有机械功来累积无弹性应变，而摩擦降较高时，快速滑动使用一些机械功来进行摩擦滑移。我们的新公式用应力演化代替了速率和状态的演化，同时在断层带内和周围积累了永久性破坏。