ExpGurson

Syntax

material ExpGurson (1) (2) (3) (4) (5) [6] [7] [8] [9] [10] [11]
# (1) int, unique material tag
# (2) double, elastic modulus
# (3) double, poissons ratio
# (4) double, yield stress
# (5) double, n
# [6] double, q1, default: 1.0
# [7] double, q2, default: 1.0
# [8] double, fn, default: 0.0
# [9] double, sn, default: 1.0
# [10] double, en, default: 0.0
# [11] double, density, default: 0.0

Remarks

1. Due to that the yield function has the quadratic term $q^2$, it shall be noted that the unit of the model shal be selected carefully. For example, if the yield stress is $1000\mathrm{MPa}$ and $\mathrm{Pascal}$ is used as the unit for stress, then the input number is ${10}^9$, the square of which is greater than ${10}^{16}$ so that the yield function likely overflows.