• 首页 | 期刊简介 | 编委会 | 投稿须知 | 出版道德规范 | 下载专区 | English
单俊芳,徐松林*,张磊,陈丽娜,王鹏飞.岩石节理动摩擦过程中的声发射和产热特性研究[J].实验力学,2020,35(1):41~57
岩石节理动摩擦过程中的声发射和产热特性研究
Investigation on acoustic emission and heat production characteristics on joint surfaces due to dynamic friction
投稿时间:2019-07-11  修订日期:2019-08-30
DOI:10.7520/1001-4888-19-121
中文关键词:  节理岩体  摩擦滑动  声发射  红外测温  数值计算
英文关键词:rock joint  friction slip  acoustic emission  infrared thermometry  numerical method
基金项目:国家自然科学基金 (11672286, 11602267, 11472264, 11872361), 中石油与中科院重大战略合作项目(2015A-4812), 安徽省自然科学基金(1708085MA05) 资助
作者单位
单俊芳 中国科学技术大学 中国科学院材料力学行为和设计重点实验室 安徽合肥 230027 
徐松林* 中国科学技术大学 中国科学院材料力学行为和设计重点实验室 安徽合肥 230027 
张磊 中国科学技术大学 中国科学院材料力学行为和设计重点实验室 安徽合肥 230027 
陈丽娜 中国科学技术大学 中国科学院材料力学行为和设计重点实验室 安徽合肥 230027 
王鹏飞 中国科学技术大学 中国科学院材料力学行为和设计重点实验室 安徽合肥 230027 
摘要点击次数: 131
全文下载次数: 0
中文摘要:
      节理岩体摩擦普遍存在于地震孕震、板块滑动等自然现象中。目前研究的重点主要集中于大位移下滑动摩擦特性的揭示,很鲜少有人对摩擦滑移初期阶段的相关特性进行研究。本文基于改进的分离式霍普金森压杆装置(SHPB)建立了多点声发射和红外测温等实验装置,研究了5种角度节理表面在摩擦滑动初期的声发射和产热特性。结果表明,与节理摩擦滑移相关的信息位于声发射信号的高频域中,对于所研究的花岗岩样品,其频率范围为78.1~312.5kHz,低于该频率范围的信号源于撞击界面的扰动;与节理摩擦滑移相关的产热信息位于红外测温信号的低频域中,5种节理面摩擦滑移产热对应的温升明显较低。为了揭示这些测量信号的内在规律,基于数值方法建立了合理的分析模型。计算结果表明,随着节理角度的增大,节理面越易滑移,节理表面温升幅值越大,但都低于0.1℃,与实验结果相一致。
英文摘要:
      Dynamic friction slip of rock joint is prevalent in seismic wave propagation and plate sliding. At present, great attention has been paid to revealing the sliding friction characteristics under large displacement, but the related characteristics at initial stage of friction-slip are seldom studied. The measurement techniques including the multi-point acoustic emission method and the infrared temperature method are established based on the modified split Hopkinson pressure device (SHPB), and the characteristics of acoustic emission and heat production at initial stage of friction sliding on the joint surfaces with five joint angles are investigated. The results show that wave profiles corresponding to the wave-induced micro slip is located at the higher frequency domain of the acoustic emission signals, e.g., frequencies ranging from 78.1kHz to 312.5kHz for granite specimens with size 50×50×50mm3. While the signal measured at the lower frequency domain originates from the disturbances impacting the interface. Wave profiles corresponding to the heat radiation information is located at the lower frequency domain in the temperature signals, and the measured amplitudes of elevated temperature of five joint surfaces are obviously lower. To reveal the intrinsic rules of these measured signals, a reasonable analysis model based on the numerical method is established. The numerical results show that with increasing the joint angle, the joint surface slides more easily, and the amplitude of elevated temperature on the joint surface increases, which is always lower than 0.1℃. The calculations are in good agreement with the experimental results.
查看全文  查看/发表评论  下载PDF阅读器
关闭

版权所有:《实验力学》编辑部
您是本站第 5625221 位访问者,今日一共访问760次,当前在线人数: 0
技术支持:本系统由北京勤云科技发展有限公司设计