Table 5 Pre-peak unloading damage model identification parameters under non-yield stress conditions (same damage degree).

From: Experimental study on uniaxial creep characteristics of sandstone with pre-peak unloading damage

σ/MPa

σul/%

EH(U)/MPa

EY(U)/MPa

ηY(U)/MPa

30

50

2.816

118.8

96.69

35

2.962

147.46

132.1

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