Mechanical APDL Structural Analysis Guide

rthree=3.0

f_0= 0.04

f_N= 0.04

S_N=0.1

strain_N=0.3

Power_N=0.1

tb,GURS,1,,5,BASE! Gurson's BASE model

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

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

tbdata,1,f_N,strain_N,S_N

tb,plas,1,,4,miso

tbpt, defi, 0.0, Yield

tbpt, defi, 1, 10.0*Yield

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

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

8.4.2.14. NLISO and GURSON Example.

The TB,NLISO option can also be used to combine nonlinear 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

rthree=3.0

f_0= 0.04

f_N= 0.04

S_N=0.1

strain_N=0.3

Power_N=0.1

tb,GURS,1,,5,BASE! Gurson's BASE model

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

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

tbdata,1,f_N,strain_N,S_N

tb,nliso,1,1,2,POWER

tbdata,1,sigma_Y,power_N

For information about the NLISO option, see Nonlinear Isotropic Hardening.

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

8.4.2.15. RATE and BISO Example.

This input listing illustrat es an example of combining bilinear isotropic hardening plasticity with the
TB,RATE command to model viscoplasticity.

MP,EX,1,20.0E5! ELASTIC CONSTANTS

MP,NUXY,1,0.3

TB,BISO,1! BISO TABLE

TBDATA,1,9000,10000

TB,RATE,1,,,PERZYNA! RATE TABLE

TBDATA,1,0.5,1

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Modeling Material Nonlinearities