岩石界面的动态剪切扩散行为

陈美多 张祥林 袁良柱 赵巨岩 王鹏飞 马昊 徐松林

陈美多, 张祥林, 袁良柱, 赵巨岩, 王鹏飞, 马昊, 徐松林. 岩石界面的动态剪切扩散行为[J]. 爆炸与冲击. doi: 10.11883/bzycj-2023-0469
引用本文: 陈美多, 张祥林, 袁良柱, 赵巨岩, 王鹏飞, 马昊, 徐松林. 岩石界面的动态剪切扩散行为[J]. 爆炸与冲击. doi: 10.11883/bzycj-2023-0469
CHEN Meiduo, ZHANG Xianglin, YUAN Liangzhu, ZHAO Juyan, WANG Pengfei, MA Hao, XU Songlin. Rough surface morphology of granite subjected to dynamic friction[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0469
Citation: CHEN Meiduo, ZHANG Xianglin, YUAN Liangzhu, ZHAO Juyan, WANG Pengfei, MA Hao, XU Songlin. Rough surface morphology of granite subjected to dynamic friction[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2023-0469

岩石界面的动态剪切扩散行为

doi: 10.11883/bzycj-2023-0469
基金项目: 国家自然科学基金(11672286,11872361,12372372);高压物理与地震科技联合实验室开放基金(2019HPPES01);中石油与中科院重大战略合作项目(2015A-4812);中央高校基本科研业务费专项资金(WK2480000008)
详细信息
    作者简介:

    陈美多(1999— ),男,博士研究生,mdchen@mail.ustc.edu.cn

    通讯作者:

    徐松林(1971— ),男,博士,研究院,博士生导师,slxu99@ustc.edu.cn

  • 中图分类号: O347.3

Rough surface morphology of granite subjected to dynamic friction

  • 摘要: 动载荷下剪切失稳控制的扩散行为是岩石局部大变形发展和宏观力学性能劣化的诱因。基于广义变分原理,建立剪切载荷作用下界面动态失稳的力学模型,得到了关于界面失稳的判别式和扩散方程。基于判别方程得到剪切力和动力效应对失稳界面角度的影响,结果表明:随着外部剪切作用力的增大,剪切变形带角度有一定程度的增大;随着局部动力系数的增大,即局部惯性作用力的增大,剪切带角度明显减小。结合本征位移求解扩散方程,初步得到其位移解析表达,随着加载时间的增加,位移逐渐增大。为了验证理论模型的可靠性,并进一步研究界面失稳的变形行为和对波传播的影响,建立了数值分析模型。分析结果表明:界面失稳为局部剪切破坏滑移的先导条件;界面厚度和剪切力越大,局部位移越大;界面剪切扩散行为极大降低了透射波的幅值,同时也改变了透射波的频率。研究结果可为岩石局部化变形、岩石动态强度等研究提供理论参考。
  • 图  1  剪切局部化失稳模型

    Figure  1.  Shear localized instability model

    图  2  剪切带角度的动力学影响

    Figure  2.  Dynamic influence of shear band angle

    图  3  冲击作用下剪切局部变形带角度的二阶近似求解

    Figure  3.  Second-order approximate solution of shear local deformation zone angle under impact

    图  4  局部化失稳模型

    Figure  4.  Localized instability model

    图  5  界面失稳形貌随剪应力的变化规律

    Figure  5.  Variation of interface instability morphology with shear stress

    图  6  随着厚度变化的界面失稳形貌

    Figure  6.  Interface instability morphology with thickness variation

    图  7  有限元计算模型

    Figure  7.  FEM model

    图  8  不同角度下界面动摩擦性能

    Figure  8.  Interface dynamic friction properties at different angles.

    图  9  有限元计算结果

    Figure  9.  Result of FEM

    图  10  界面参数影响

    Figure  10.  Effect of interface parameters

    图  11  局部剪切力的影响

    Figure  11.  Effect of local shear force.

    图  12  界面厚度对位移和应变的影响

    Figure  12.  Influence of interface thickness effect of interface thickness on displacement and strain

    图  13  界面层上下的应力传递

    Figure  13.  Stress transfer above and below the interface layer.

    表  1  岩石材料参数

    Table  1.   Rock material parameters

    ρ/(kg·m−3 E/GPa ν λ/GPa μ/GPa ${E/{E_{{\text{tm}}}^{\text{p}}}}$ ${E / {E_{{\text{te}}}^{\text{p}}}}$
    2600 30 0.23 10.4 12.2 50 2
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  • 收稿日期:  2023-12-28
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