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Table 3 Summary of experimental conditions and results

From: Frictional properties of the shallow Nankai Trough accretionary sediments dependent on the content of clay minerals

Sample T Pc(MPa) Pp(MPa) Vaxial(μm/s) Vsliding(μm/s) μss@Vaxial = 1µm/s a − b μss/∆lnVsliding
C2516 RT 36 28 0.1, 1, 10 0.1155, 1.155, 11.55 0.25 0.0046 ± 0.0011 0.0127 ± 0.0013
C2571 RT 37 29 0.1, 1, 10 0.1155, 1.155, 11.55 0.82 0.0073 ± 0.0026 0.0078 ± 0.0012
C2652 RT 38 29 0.1, 1, 10 0.1155, 1.155, 11.55 0.53 0.0022 ± 0.0015 0.0041 ± 0.0006
C9073 RT 57 43 0.1, 1, 10 0.1155, 1.155, 11.55 0.56 0.0063 ± 0.0005 0.0103 ± 0.0007
C9087 RT 57 43 0.1, 1, 10 0.1155, 1.155, 11.55 0.71 0.0040 ± 0.0012 0.0046 ± 0.0017
  1. T, temperature; RT, room temperature; Pc, confining pressure; Pp, pore pressure; Vaxial, axial displacement rate; Vsliding, sliding velocity; μss, steady-state friction coefficient; a − b, difference in instantaneous and decayed responses after an e-times stepwise change in sliding velocity; ∆μ ss /∆lnVsliding, ratio of incremental steady-state friction coefficient to incremental logarithmic sliding velocity. See text for details to determine μss, (a − b), and Δμss/ΔlnVsliding values.