冲击下花岗岩界面动态摩擦特性实验研究

徐松林; 郑文; 刘永贵; 郑航

doi:10.11858/gywlxb.2011.03.003

冲击下花岗岩界面动态摩擦特性实验研究

doi: 10.11858/gywlxb.2011.03.003

中国科学技术大学近代力学系中国科学院材料力学行为和设计重点实验室，安徽合肥 230027

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通讯作者:
徐松林

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出版历程
- 收稿日期: 2010-05-04
- 修回日期: 2010-06-09
- 发布日期: 2011-06-15

Experimental Investigation on Interface Dynamic Friction of Granite under Combined Pressure and Shear Impact Loading

CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230027, China

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Corresponding author: XU Song-Lin

摘要

摘要: 为研究岩石界面动态摩擦性能，对房山花岗岩进行了冲击速度42.2~130.6 m/s、倾斜角为20和30的横剖试样斜撞击实验。倾斜角为20的为对比实验，研究不发生滑动时的界面性能；在倾斜角为30的实验中，靶和飞片撞击界面发生相对滑动，用于研究发生界面滑动时的动态摩擦性能。基于此，研究了正应力在317~685 MPa、界面相对滑移速度在2.76~24.88 m/s时花岗岩界面滑动态摩擦状态。其结果可以初步揭示地震过程板块动态摩擦过程摩擦强度急剧降低的现象。
- 冲击动力学 /
- 实验研究 /
- 压剪联合冲击 /
- 动态摩擦 /
- 界面滑动
Abstract: To investigate the dynamic friction behaviors of rock interface, series of experiments including oblique planar impact with inclination angle 20 and 30, impact loading velocity ranging from 42.2 m/s to 130.6 m/s for Fangshan granite, are carried out. Experiments with inclination angle 20 were carried out to study interfacial properties for specimen without interfacial sliding, and those with inclination angle 30 were used to study the dynamic friction behaviors for specimens with interfacial sliding. Experimental results preliminarily revealed the dynamic friction behaviors of granite surface under the pressures range from 317 MPa to 685 MPa and the surface sliding velocities range from 2.76 m/s to 24.88 m/s. The preliminary results indicated a complicated process of the dynamic friction, which is helpful for the understanding of the earthquake slip.
- impact mechanics /
- experimental study /
- combined pressure and shear impact loading /
- dynamic friction /
- interfacial sliding

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参考文献(14)

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