Plane Strain Duncan-Selig Soil Model
material DuncanSelig (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) [11]
# (1) int, unique material tag
# (2) double, reference atmospheric pressure, postive, p_a
# (3) double, reference elatic modulus, E_r
# (4) double, elastic modulus exponent, n
# (5) double, reference bulk modulus, B_r
# (6) double, bulk modulus exponent, m
# (7) double, initial friction angle, \phi_i
# (8) double, friction angle slope, \Delta\phi
# (9) double, ratio of actual failure to ultimate failure, r_f
# (10) double, cohesion, c
# [11] double, density, default: 0.0
The constitutive relationship can be expressed as
Note it is an incremental form of the constitutive relationship.
Symbols
The elastic modulus
with
The friction angle
The deviatoric stress
The bulk modulus