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    Relationship between loading rate and aspect ratio

     
    2024, 46(1): 131-139.
    Length-diameter ratio effects of dynamic shear strength of coal samples under different impact air pressures .

    Figures of the Article

    • SHPB test system
    • Test coal samples
    • Schematic diagram of sample loading
    • Force balance at both ends of samples with different l/d
    • Time-history course of dynamic shear stress curves of coal samples with different l/d
    • Failure modes of samples under different l/d
    • Relationship between dynamic shear strength and impact pressure
    • Relationship between dynamic shear strength and l/d
    • Curves of dynamic shear strength of coal samples with l/d under different values of parameter a
    • Relationship between dynamic shear strength and loading rate
    • Relationship between loading rate and aspect ratio
    • CT scan slices of coal

    Tables of the Article

    • p/MPa $ \dot \tau $/(GPa·s-1) 加载率/(GPa·s-1)
      平均值 理论值
      0.25 91.81 90.90 89.09
      95.14
      85.75
      0.35 138.91 137.68 139.58
      143.50
      130.64
      0.45 232.41 229.61 231.52
      225.60
      230.82
      0.55 335.75 322.44 318.52
      321.34
      310.23
      Loading rates of coal samples at l/d=0.30 under different impact air pressures
    • l/d 0.4 0.6 0.8
      内部三维裂隙
      裂隙体积/mm3 21.70 26.20 50.00
      CT scan results of coal samples
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