应变率及节理倾角对岩石模拟材料动力特性的影响

李祥龙 王建国 张智宇 黄永辉

李祥龙, 王建国, 张智宇, 黄永辉. 应变率及节理倾角对岩石模拟材料动力特性的影响[J]. 爆炸与冲击, 2016, 36(4): 483-490. doi: 10.11883/1001-1455(2016)04-0483-08
引用本文: 李祥龙, 王建国, 张智宇, 黄永辉. 应变率及节理倾角对岩石模拟材料动力特性的影响[J]. 爆炸与冲击, 2016, 36(4): 483-490. doi: 10.11883/1001-1455(2016)04-0483-08
Li Xianglong, Wang Jianguo, Zhang Zhiyu, Huang Yonghui. Experimental study for effects of strain rates and joint angles on dynamic responses of simulated rock materials[J]. Explosion And Shock Waves, 2016, 36(4): 483-490. doi: 10.11883/1001-1455(2016)04-0483-08
Citation: Li Xianglong, Wang Jianguo, Zhang Zhiyu, Huang Yonghui. Experimental study for effects of strain rates and joint angles on dynamic responses of simulated rock materials[J]. Explosion And Shock Waves, 2016, 36(4): 483-490. doi: 10.11883/1001-1455(2016)04-0483-08

应变率及节理倾角对岩石模拟材料动力特性的影响

doi: 10.11883/1001-1455(2016)04-0483-08
基金项目: 

国家自然科学基金项目 51304087

云南省基金项目 KKSY201404056

爆炸科学与技术国家重点实验室开发基金项目 KFJJ15-14M

详细信息
    作者简介:

    李祥龙(1981—),男,博士,副教授,lxl00014002@163.com

  • 中图分类号: O347.3

Experimental study for effects of strain rates and joint angles on dynamic responses of simulated rock materials

  • 摘要: 采用相似材料模拟实验方法并借助SHPB(split Hopkinson pressure bar)实验系统,探究应变率及节理倾角对节理岩石动态力学性状的影响,包括应力应变曲线特征、破坏模式、能量传递及耗散规律。该实验结果表明:应变率升高,动态弹性模量增大,试件破碎块度变小,完整试件裂纹缺陷沿着平行于压应力方向扩展;节理角度越大,峰值强度越低,但当应变率升高到一定程度,节理角度对岩石破坏形态的影响不再明显;不同试件的入射能、反射能、透射能和耗散能均随应变率升高呈非线性增加,含倾斜角度节理试件的能量耗散率随应变率的变化幅度明显大于完整试件。
  • 图  1  不同应变率下完整试件的动态应力应变曲线

    Figure  1.  Dynamic stress-strain curves of intact specimens at different strain rates

    图  2  不同应变率下完整试件的破坏形态

    Figure  2.  Failure patterns of intact specimens at different strain rates

    图  3  不同应变率下15°节理试件的动态应力应变曲线

    Figure  3.  Dynamic stress-strain curves of 15° jointed specimens at different strain rates

    图  4  不同应变率下15°节理试件的破坏形态

    Figure  4.  Failure patterns of 15° jointed specimens at different strain rates

    图  5  不同应变率下30°节理试件的动态应力应变曲线

    Figure  5.  Dynamic stress-strain curves of 30° jointed specimens at different strain rates

    图  6  不同应变率下30°节理试件的破坏形态

    Figure  6.  Failure patterns of 30° jointed specimens at different strain rates

    图  7  完整试件能量随应变率的变化曲线

    Figure  7.  Energy-strain rate curves of intact specimens

    图  8  15°节理试件能量随应变率的变化曲线

    Figure  8.  Energy-strain rate curves of 15° jointed specimens

    图  9  30°节理试件能量随应变率的变化曲线

    Figure  9.  Energy-strain rate curves of 30° jointed specimens

    图  10  能量耗散率与应变率的关系曲线

    Figure  10.  Energy dissipation rate varying with strain rate

    表  1  不同撞击条件下试件几何参数

    Table  1.   Geometry parameters of specimens under different impact conditions

    N p/MPa v/(m·s-1) D/mm l/mm β/(°) n 贯通程度
    X7 0.55 3.283 48.20 100.51 完整
    X6 0.55 3.903 48.63 100.22 完整
    X4 0.58 4.867 48.53 99.85 完整
    X11 0.58 5.023 48.25 100.06 完整
    X3 0.60 5.445 48.46 99.91 完整
    X5 0.60 5.993 48.73 100.13 完整
    B10 0.54 2.510 48.61 100.41 15 1 径向贯通
    B12 0.55 3.356 48.61 100.40 15 1 径向贯通
    B4 0.55 3.794 48.68 100.33 15 1 径向贯通
    B13 0.55 4.082 49.66 100.21 15 1 径向贯通
    B5 0.58 5.082 48.75 100.73 15 1 径向贯通
    B6 0.60 6.004 48.55 100.51 15 1 径向贯通
    C11 0.55 3.563 48.48 101.89 30 1 径向贯通
    C4 0.55 3.913 48.73 99.98 30 1 径向贯通
    C1 0.55 4.167 48.67 101.39 30 1 径向贯通
    C5 0.58 5.116 50.12 99.81 30 1 径向贯通
    C6 0.60 5.581 48.74 101.41 30 1 径向贯通
    C3 0.60 5.699 49.64 100.91 30 1 径向贯通
    下载: 导出CSV

    表  2  SHPB动态冲击下不同试件的能量分布

    Table  2.   Energy distribution of different specimens subjected to SHPB dynamic impact

    N v/(m·s-1) /s-1 Ei/J Er/J Et/J Ed/J Ed/Ei
    X7 3.283 28.12 55.67 22.74 14.49 18.45 0.331 4
    X6 3.903 31.76 81.57 22.38 34.53 24.66 0.302 3
    X4 4.867 38.59 119.16 40.23 34.17 44.76 0.375 6
    X11 5.023 39.73 133.50 63.58 24.65 45.27 0.339 1
    X3 5.445 45.39 158.32 72.45 30.49 55.38 0.349 8
    X5 5.993 54.94 189.25 100.90 26.25 62.10 0.328 1
    B10 2.510 20.07 29.57 21.15 2.40 6.02 0.203 6
    B12 3.356 25.17 55.72 32.23 8.55 14.95 0.268 3
    B4 3.794 32.28 71.95 51.08 3.82 17.05 0.237 0
    B13 4.082 35.71 80.92 38.58 9.48 32.86 0.406 1
    B5 5.082 44.67 136.01 77.57 7.25 51.19 0.376 4
    B6 6.004 47.16 186.31 88.15 15.01 83.16 0.446 4
    C11 3.563 30.12 67.56 45.77 4.74 17.05 0.252 4
    C4 3.913 33.78 74.81 58.23 1.64 14.93 0.199 6
    C1 4.167 37.26 85.59 40.69 7.08 37.82 0.441 9
    C5 5.116 42.34 134.49 58.05 23.26 53.18 0.395 4
    C6 5.581 50.85 161.88 117.04 7.23 37.62 0.232 4
    C3 5.699 52.79 163.74 85.63 9.31 68.81 0.420 2
    下载: 导出CSV
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出版历程
  • 收稿日期:  2015-06-09
  • 修回日期:  2015-08-13
  • 刊出日期:  2016-07-25

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