...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Pure and Applied Geophysics >Voids and Rock Friction at Subseismic Slip Velocity
【24h】

Voids and Rock Friction at Subseismic Slip Velocity

机译：底裂速度下的空隙和岩石摩擦

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

AbstractWe found that the amplitudes of transmitted waves across the sliding surfaces are inversely correlated to high slip rate friction, especially when the interfaces slide fast (>?10?3?m/s). During the rock–rock friction experiments of metagabbro and diorite at sub-seismic slip rate (~?10?3?m/s), friction does not reach steady state but fluctuates within certain range. The amplitudes of compressional waves transmitted across the slipping interfaces decrease when sliding friction becomes high and it increases when friction is low. Such amplitude variation can be interpreted based on the scattering theory; small amplitudes in transmitted waves correspond to the creation of large-scale (~?50?μm) voids and large amplitudes correspond to the small-scale (~?0.5?μm) voids. Thus, large-scale voids could be generated during the high-friction state and low-friction state was achieved by grain size reduction caused by a comminution process. This was partly confirmed by the experiments with a synthetic gouge layer. The result can be interpreted as an extension of force chain theory to high-velocity sliding regime; force chains were built during the high friction and they were destroyed during the low friction. This mechanism could be a microscopic aspect of friction evolution at sub-seismic slip rate.]]>
机译：Abstract我们发现，穿过滑动面的透射波振幅与高滑动率摩擦成反比，尤其是当界面滑动速度快时（>10？3？m/s）变辉长岩和闪长岩在亚地震滑动速率（~10<上标>？3<上标>？m/s）下的岩石-岩石摩擦实验中，摩擦没有达到稳定状态，而是在一定范围内波动。当滑动摩擦力增大时，通过滑动界面传输的纵波振幅减小，当摩擦力减小时，纵波振幅增大。这种振幅变化可以用散射理论来解释；透射波中的小振幅对应于大尺度（~50μm）空洞的产生，而大振幅对应于小尺度（~0.5μm）空洞。因此，在高摩擦状态下可能会产生大量空隙，而低摩擦状态是通过粉碎过程导致的粒度减小实现的。这在一定程度上得到了人工凿层实验的证实。这一结果可以解释为力链理论在高速滑动区域的延伸；力链在高摩擦时形成，在低摩擦时被破坏。这种机制可能是次地震滑动速率下摩擦演化的微观方面]>

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号