Abstract Frictional heterogeneity within fault zones is one of the factors proposed to explain the spectrum of slow, intermediate, and fast slip behaviors exhibited by faults in nature. Numerical modeling shows how even a simplified model setup incorporating sliding on a velocity-weakening (VW) patch surrounded by velocity-strengthening (VS) material can reproduce a rich variety of slip behaviors resembling nature. However, experimental investigations of sliding on heterogeneous faults are few. In this study, the slip behavior of three, 347 mm long × 50 mm wide, heterogeneous experimental faults, constructed using diagonally sawcut PMMA forcing blocks, was investigated at low normal stresses (

中文翻译：

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非均质凿岩段对 dm 尺度实验断层滑动行为的影响

摘要 断层带内的摩擦非均质性是被提议用来解释自然界断层表现出的慢、中、快滑动行为谱的因素之一。数值建模显示，即使是在速度增强 (VS) 材料包围的速度减弱 (VW) 贴片上包含滑动的简化模型设置也可以重现丰富多样的类似于自然的滑动行为。然而，在异质断层上滑动的实验研究很少。在这项研究中，使用斜锯切 PMMA 加压块构建的三个长 347 mm × 50 mm 宽的异质实验断层的滑动行为在低正应力下进行了研究（