节理千枚岩能量传递与动力学特性

doi:10.12068/j.issn.1005-3026.2021.07.012

摘要/Abstract

摘要： 采用SHPB装置研究不同节理倾角千枚岩在同一冲击速度下的能量传递规律和强度衰减特征，分析干燥与饱和状态下节理千枚岩的动力学特性.结果表明:节理倾角0°时强度最大，60°时强度最小，饱和状态下千枚岩峰值动强度降低，延性增强；千枚岩的反射能显著大于透射能，且随着节理倾角变化，两者增长变化规律相反；饱和状态下反射能和透射能达到稳定阶段出现时间滞后现象；随着节理倾角的增大，千枚岩反射能比先增后减，透射能比、耗散能比则变化相反，倾角60°时反射能比最大，透射能比、耗散能比最小；随着节理倾角的增长，千枚岩破坏耗能与峰值强度均呈U型分布.

关键词: SHPB试验；节理千枚岩；能量耗散；动力学特性；动强度；透射能比

Abstract: A SHPB device was conducted to investigate the energy transfer law and strength attenuation characteristics of phyllite with different joint angles under the same impact velocity. Dynamic characteristics of jointed phyllite under dry and saturated conditions was also analyzed. The results showed that the maximum strength is at 0°， and the minimum strength is at 60°. The peak dynamic strength of the phyllite is reduced and the ductility is enhanced under saturated state. The reflection energy of phyllite is significantly greater than the transmission energy， and these laws of the reflection energy and the transmission energy are opposite with the varying joint angle. The lag phenomenon occurs in the time required for the reflection energy and the transmission energy to reach the stable stage under saturated state. As the joint angle increases， the reflection energy ratio of phyllite increases first and then decreases， and the growth trend of transmission energy ratio and dissipation energy ratio are opposite. When the joint angle is 60°， the reflection energy ratio is the largest and the transmission energy ratio and the dissipation energy ratio is the smallest. With the increase of the joint angle， the energy dissipation and peak strength is U-shaped.

Key words: SHPB test； jointed phyllite； energy dissipation； dynamic characteristics； dynamic strength； transmission energy ratio

中图分类号:

TU45

许江波，费东阳，孙浩珲，崔易仑. 节理千枚岩能量传递与动力学特性[J]. 东北大学学报（自然科学版）, 2021, 42(7): 986-995.

XU Jiang-bo， FEI Dong-yang， SUN Hao-hui， CUI Yi-lun. Energy Transfer and Dynamic Characteristics of Jointed Phyllite[J]. Journal of Northeastern University(Natural Science), 2021, 42(7): 986-995.

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