Mechanical APDL Structural Analysis Guide

tb,GURS,1,,3,SNNU! Gurson's SNNU model

tbdata,1,f_N,strain_N,S_N

TB,BISO,1! BISO TABLE

TBDATA,1,Yield, Power_N

For information about the BISO option, see Bilinear Isotropic Hardening.

For information about the GURSON option, see Gurson's Model.

8.4.2.12. GURSON and MISO Example.

The TB,MISO option can also be used to combine multilinear isotropic hardening with Gurson plasticity,
as shown in the following example:

Young=1000000

sigma_Y=Young/300.0

yield=1.0d0/sigma_Y/3.1415926

! define elastic Properties

mp,ex,1,Young

mp,nuxy,1,0.3

! Define Gurson's coefficients

q1=1.5

q2=1

q3=q1*q1

f_0= 0.000000

f_N= 0.04

S_N=0.1

strain_N=0.3

Power_N=0.1

f_c=0.15

f_F=0.25

! Gurson Model

tb,gurs,1,,5,BASE! BASE DEFINED

tbdata,1,sigma_Y,f_0,q1,q2,q3

tb,gurs,1,,3,SNNU! SNNU DEFINED

tbdata,1,f_N,strain_N,S_N

tb,gurs,1,,2,COAL! COAL DEFINED

tbdata,1,f_c,f_F

tb,miso,,,6

tbpt,,0.003333333, 3333.333333

tbpt,,0.018982279, 3966.666667

tbpt,,0.103530872, 4700

tbpt,,0.562397597, 5566.666667

tbpt,,1.006031106, 5900

tbpt,,2.934546576, 6566.666667

For information about the MISO option, see Multilinear Isotropic Hardening.

For information about the GURSON option, see Gurson's Model.

8.4.2.13. GURSON and PLAS (MISO) Example.

The TB,PLAS ,,, MISO option can also be used to combine multilinear isotropic hardening with Gurson
plasticity, as shown in the following example:

q1=1.5

q2=1

q3=q1*q1

sigma_Y=E/300.0

Yield=1.0/sigma_Y

rone=1.0

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Nonlinear Structural Analysis