首页> 外文会议>International Conference on Rock Dynamics and Applications >An experimental study of dynamic tensile failure of rocks subjected to hydrostatic confinement
【24h】

An experimental study of dynamic tensile failure of rocks subjected to hydrostatic confinement

机译:静液压监禁岩体动态拉伸失效的实验研究

获取原文

摘要

To simulate the in situ stress state of underground rocks, a modified Split Hopkinson Pressure Bar (SHPB) system is utilized to load Brazilian Disc (BD) samples hydrostatically, and then exert dynamic load to the sample by impacting the striker on the incident bar. Five groups of Laurentian granite BD samples (with static BD tensile strength of 12.8 MPa) under the hydrostatic confinement of 0 MPa, 5 MPa, 10 MPa, 15 MPa, and 20 MPa were tested under different loading rates. The result shows that the dynamic tensile strength increases with the hydrostatic confinement stress. It is also observed that under the same hydrostatic pre-stress, the dynamic tensile strength increases with the loading rate, revealing the so called material rate dependency. Furthermore, the increment of the tensile strength decreases with the hydrostatic confinement stress, which resembles the behavior of rock static tensile strength under confining pressure as reported in the literature.
机译:为了模拟地下岩石的原位应力状态,改进的分裂霍普金森压力棒(SHPB)系统用于加载巴西圆盘(BD)样品,然后通过影响入射杆上的前锋将动态负荷施加到样品上。在不同的负载率下测试在0MPa,5MPa,10MPa,15MPa和20MPa的静水压限制下的五组Laurentian Granite BD样品(具有12.8MPa的静态BD抗拉伸强度)。结果表明,动态拉伸强度随着静水压限制应力而增加。还观察到,在相同的水压预应力下,动态拉伸强度随装载速率而增加,揭示所谓的材料速率依赖性。此外,拉伸强度的增量随着静液压限制应力而降低,其类似于文献中报道的限制压力下的岩石静态拉伸强度的行为。

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