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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, PP. 207-212

Keywords: 冲击动力学,实验研究,压剪联合冲击,动态摩擦,界面滑动

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Abstract:

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42.2~130.6m/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317~685MPa、界面相对滑移速度在2.76~24.88m/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。

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