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ExpGurson

Syntax

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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

Due to that the yield function has the quadratic term q2, it shall be noted that the unit of the model shall be selected carefully. For example, if the yield stress is 1000 MPa and Pascal is used as the unit for stress, then the input number is 109, the square of which is greater than 1016 so that the yield function likely overflows.