Fig 1.
Comparison of total stress-strain curve and creep curve.
Table 1.
Relationships between cohesion, internal friction coefficient and (σ-σs)t.
Fig 2.
Relationship between cohesion and (σ-σs)t.
Fig 3.
Relationship between internal friction coefficient and (σ-σs)t.
Fig 4.
Schematic diagram of Burgers creep model.
Fig 5.
N|Y strain time curve.
Fig 6.
D-NVP volume schematic.
Fig 7.
Creep characteristics of D-NVP.
Fig 8.
Schematic diagram of D-NVEP model.
Fig 9.
Fitting curve in stable creep stage.
Fig 10.
Fitting curve in unsteady creep stage.
Fig 11.
Fitting curve of D-NVEP model.
Fig 12.
Fitting curve of Burgers model.
Fig 13.
Fitting curve of D-NVEP model (without initial value).
Table 2.
Identification table of model parameters in stable creep stage.
Table 3.
Identification table of model parameters in unsteady creep stage.
Table 4.
Identification table of CF-D-NVP model parameter.
Fig 14.
Comparison between the predicted curve and the test curve under stress levels of 14 MPa and 13 MPa.