Table 5. Hardening model for
McCormick Ranch sand (HKS
1996).
Hydrostatic
stress, Pb
Volumetric plas-
pl
tic strain, ε vol
(MPa)
0.138
0
0.172
0.005
Table 4. Material constants for DruckerPrager cap model of
McCormick Ranch sand (HKS 1996).
0.434
0.01
0.896
0.02
Material parameter
Value
1.655
0.03
Young's modulus, E
689 Mpa (100000 psi)
Poisson's ratio, ν
0.25
2.758
0.04
Drucker-Prager material angle of friction, β
14.56
4.137
0.05
Drucker-Prager material cohesion, d
1.194 MPa (173.2 psi)
Cap eccentricity parameter, R
0.1
6.895
0.06
Initial value of volumetric plastic strain, εplol|0
0.001
v
13.447
0.10
Flow stress ratio, K
1.0
Figure 34. Validation of McCormick Ranch sand
DruckerPrager cap model with uniaxial strain test data
from DiMaggio and Sandler (1976). (After HKS 1996.)
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