Can I read Frictional Behavior and Micro-damage Characteristics of Rough Granite Fractures on EtoBox?

Frictional Behavior and Micro-damage Characteristics of Rough Granite Fractures by Fanzhen Meng; Louis Ngai Yuen Wong; Tianyang Guo is a Earth and Planetary Sciences article available to read on EtoBox.

What is Frictional Behavior and Micro-damage Characteristics of Rough Granite Fractures about?

Natural faults or discontinuities in general are usually rough at different scales, and the roughness of fault surfaces plays a dominant role in determining the mode of sliding (stable or unstable). Understanding the frictional behavior of rough fractures is important for investigating the mechanics and nucleation of earthquakes, and other dynamic geo-hazards such as induced seismicity and fault slip rockburst. We perform direct shear tests on rough granite fractures to investigate the shear behavior, microscopic asperity damage and surface wear characteristics under different normal stresses (10 to 40 MPa). We then compare our test results with those obtained using ground saw-cut fault surfaces. Results indicate that stick-slip occurs on all the rough fractures during the sliding stage, and the amount of stress drops and fault gouges tends to increase with normal stress. The peak friction coefficient is much higher than that of ground fault surfaces, while the steady-state friction coefficient is comparable with that of the ground surfaces. We identify three different scales of brittle fractures, which are considered to be closely related to the stick-slip sliding, namely shear-of

Who reads Frictional Behavior and Micro-damage Characteristics of Rough Granite Fractures?

Author

Fanzhen Meng; Louis Ngai Yuen Wong; Tianyang Guo

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)