不同状态下冰冲击的力学特性

解北京 陈铭进 陈思羽 刘志遥

解北京, 陈铭进, 陈思羽, 刘志遥. 不同状态下冰冲击的力学特性[J]. 爆炸与冲击. doi: 10.11883/bzycj-2024-0207
引用本文: 解北京, 陈铭进, 陈思羽, 刘志遥. 不同状态下冰冲击的力学特性[J]. 爆炸与冲击. doi: 10.11883/bzycj-2024-0207
XIE Beijing, CHEN Mingjin, CHEN Siyu, LIU Zhiyao. Experimental study on mechanical properties of ice shock under different states[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0207
Citation: XIE Beijing, CHEN Mingjin, CHEN Siyu, LIU Zhiyao. Experimental study on mechanical properties of ice shock under different states[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0207

不同状态下冰冲击的力学特性

doi: 10.11883/bzycj-2024-0207
基金项目: 国家重点研发计划(2022YFC2904100);中央高校基本科研业务费专项资金(2023ZKPYAQ04);中国矿业大学(北京)大学生创新训练项目(202312031)
详细信息
    作者简介:

    解北京(1984- ),男,博士,副教授,bjxie1984@163.com

    通讯作者:

    陈铭进(1999- ),男,硕士研究生,CMJ1357550362@163.com

  • 中图分类号: O383

Experimental study on mechanical properties of ice shock under different states

  • 摘要: 为探究非纯净冰和非完整冰在冲击载荷下的动态力学特性,基于改进后的分离式霍普金森压杆实验系统,采用快速加载、杆端降温和波形整形技术,对冻结温度为−10 ℃的完整冰(纯水,含2.5%、3.5%、4.5%盐分,含2.0%、4.5%、8.5%椰丝)和拼接冰(拼接界面倾角30°、60°)进行冲击力学特性研究;利用高速摄像技术记录破坏过程,并结合Mohr-Coulomb强度准则分析拼接冰的破坏模式。结果表明:纯水冰具有最高的抗压强度,添加椰丝的冰样次之,且二者表现出相似的正应变率效应,添加盐分的冰的抗压强度最低,应变率效应也不明显。添加椰丝的冰样的动态抗压强度随椰丝含量的增加先增大后减小;由于椰丝对小粒径碎冰的联结作用,高椰丝含量的冰样的应力-应变曲线易出现“双峰”现象。拼接平面对裂纹扩展和破坏模式均有影响,拼接冰的抗压强度低于完整冰。界面倾角较小时,拼接冰破坏以界面滑移为主;倾角大时,拼接冰以整体破坏为主,与完整冰类似。
  • 图  1  实验装置

    Figure  1.  Experimental apparatus

    图  2  拼接冰试样

    Figure  2.  A sample of spliced ice

    图  3  高/低速冲击下应变片测得的电压曲线对比

    Figure  3.  Comparison of voltage curves obtained by strain gauge under high/low speed impact

    图  4  整形后试样的动态平衡结果

    Figure  4.  The result of dynamic balance of the sample after shaping

    图  5  应变率为200 s−1时完整冰样的应力-应变曲线

    Figure  5.  Stress-strain curves of intact ice samples at strain rate of 200 s−1

    图  6  应变率为200 s−1时纯水冰的冲击破坏过程

    Figure  6.  Impact failure process of pure water ice at strain rate of 200 s−1

    图  7  应变率为200 s−1时纯水冰的应力-时间曲线

    Figure  7.  Stress-time curve of pure water ice at strain rate of 200 s−1

    图  8  不同应变率下完整冰样的抗压强度

    Figure  8.  Compressive strength of intact ice samples at different strain rates

    图  9  纯水冰和含盐冰破坏时的高速摄像图像

    Figure  9.  High-speed camera images of the destruction of pure ice and salt added ice

    图  10  含椰丝冰的应力-应变曲线

    Figure  10.  Stress-strain curve of ice containing shredded coconut

    图  11  含椰丝冰的破坏过程与破坏结果

    Figure  11.  Destruction process and result of ice containing shredded coconut

    图  12  不同拼接角度下冰样的抗压强度

    Figure  12.  Compressive strength of ice samples at different splicing angles

    图  13  不同应变率下拼接冰的应力-应变曲线

    Figure  13.  Stress-strain curves of spliced ice at different strain rates

    图  14  不同应变率下拼接冰的破坏过程

    Figure  14.  Failure process of spliced ice at different strain rates

    图  15  单轴压缩下岩石-混凝土组合体试件的破坏模式[25]

    Figure  15.  Failure mode of rock-concrete composite specimens under uniaxial compression[25]

    图  16  冰样受载情况与Mohr-Coulomb强度准则

    Figure  16.  Ice loading and Mohr-Coulomb strength criterion

    表  1  实验工况设计

    Table  1.   Experimental condition design

    试样编号材质拼接角度/(°)撞击杆速度/(m·s−1)
    1~4纯水完整8、10、12、14
    5~8水+2.5%盐完整
    9~12水+3.5%盐完整
    13~16水+4.5%盐完整
    17~20水+2.0%椰丝完整
    21~24水+4.5%椰丝完整
    25~28水+8.5%椰丝完整
    29~32纯水30
    33~36纯水60
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  • 收稿日期:  2024-06-27
  • 修回日期:  2024-09-18
  • 网络出版日期:  2024-09-23

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