Research Article

A Constitutive Model of Sandy Gravel Soil under Large-Sized Loading/Unloading Triaxial Tests

Table 5

Failure stress under unloading conditions.

ε1ε1 − ε3ε1 − 2ε3(ε1 − 2ε3)/2(ε1 − ε3)
70%90%70%90%70%90%

0.20.290.371.93.83.35.2
0.40.550.72.485.22.23.7
0.60.750.973.46.22.03.14