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Volume 25 Issue 11
Nov.  2018
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文章导航 >  矿物冶金与材料学报（英文）  > 2018  >  25(11): 1237-1245
Xin Chen, Mei-feng Cai, Jian-chuan Li,  and Wen-hui Tan, Theoretical analysis of JMC effect on stress wave transmission and reflection, Int. J. Miner. Metall. Mater., 25(2018), No. 11, pp. 1237-1245. https://doi.org/10.1007/s12613-018-1676-6
Cite this article as:
Xin Chen, Mei-feng Cai, Jian-chuan Li,  and Wen-hui Tan, Theoretical analysis of JMC effect on stress wave transmission and reflection, Int. J. Miner. Metall. Mater., 25(2018), No. 11, pp. 1237-1245. https://doi.org/10.1007/s12613-018-1676-6
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研究论文

Theoretical analysis of JMC effect on stress wave transmission and reflection

  • Beijing Key Laboratory of Urban Underground Space Engineering, University of Science and Technology Beijing, Beijing 100083, China

  • Civil and Resource Engineering School, University of Science and Technology Beijing, Beijing 100083, China

  • Institute of Underground Space Technology, School of Civil Engineering, Southeast University, Nanjing 210096, China

  • 通讯作者:

    Jian-chuan Li    E-mail: jcli@seu.edu.cn

  • Taking the joint matching coefficient (JMC) which represents the contact area ratio of the joint in rock masses as the key parameter, a one-dimensional contacted interface model (CIM-JMC) was established in this study to describe the wave propagation across a single joint. According to this model, the reflected and transmitted waves at the joint were obtained, and the energy coefficients of reflection and transmission were calculated. Compared with the modified Split Hopkinson pressure bar (SHPB) experiment, it was validated by taking the incident wave of the SHPB test as the input condition in the CIM-JMC, and the reflected and transmitted waves across the joint were calculated by the model. The effects of four sets of JMCs (0.81, 0.64, 0.49, and 0.36) on the transmission and reflection of the stress wave propagation across the joint were analyzed and compared with the experimental results. It demonstrated that the values of CIM-JMC could represent both the transmission and reflection of the stress wave accurately when JMC > 0.5, but could relatively accurately represent the reflection rather than the transmission when JMC < 0.5. By contrasting energy coefficients of joints with different JMCs, it was revealed that energy dissipated sharply along the decrease of JMC when JMC > 0.5.
    • Research Article

    Theoretical analysis of JMC effect on stress wave transmission and reflection

    + Author Affiliations
      Abstract
    • Taking the joint matching coefficient (JMC) which represents the contact area ratio of the joint in rock masses as the key parameter, a one-dimensional contacted interface model (CIM-JMC) was established in this study to describe the wave propagation across a single joint. According to this model, the reflected and transmitted waves at the joint were obtained, and the energy coefficients of reflection and transmission were calculated. Compared with the modified Split Hopkinson pressure bar (SHPB) experiment, it was validated by taking the incident wave of the SHPB test as the input condition in the CIM-JMC, and the reflected and transmitted waves across the joint were calculated by the model. The effects of four sets of JMCs (0.81, 0.64, 0.49, and 0.36) on the transmission and reflection of the stress wave propagation across the joint were analyzed and compared with the experimental results. It demonstrated that the values of CIM-JMC could represent both the transmission and reflection of the stress wave accurately when JMC > 0.5, but could relatively accurately represent the reflection rather than the transmission when JMC < 0.5. By contrasting energy coefficients of joints with different JMCs, it was revealed that energy dissipated sharply along the decrease of JMC when JMC > 0.5.
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