Mechanical APDL Basic Analysis Guide

solution

!

! Apply a constant state of the initial stresses.

!

inistate,defi,all,,,,1322.34,2022.21,302.43,4040.32,5076.32,6021.456

!

! Verify the applied stresses then delete those of element #1

!

inistate,list

inistate,dele, 1

!

! Set the boundary conditions and then solve

!

inistate,list

solve

finish

4.6.3. Example: Initial Strain Problem Using the INISTATE Command

This example initial strain problem is a simple uniaxial test. A displacement of 0.05 is applied to this
single element. An additional 0.05 initial strain is applied. The calculated results include the effects of
both initial strain field and the applied displacement.

delta = 0.05

ndiv=1

/prep7

! Define the material

mp,ex,1,20E3

mp,nuxy,1,0.3

mp,dens,1,7850! kg/m3

et,1,185

block,0,1,0,1,0,1

lesize,all,,,ndiv

vmesh,all,all

finish

/solu

nsel,s,loc,x

d,all,ux

nsel,s,loc,y

d,all,uy

nsel,s,loc,z

d,all,uz

inistate,set,dtyp,epel

inistate,defi,,,,,0.05,

nsel,s,loc,x,1

d,all,ux,delta

allsel,all

solve

/post1

set,last

presol,s

presol,epto

presol,epel

finish

4.6.4. Example: Initial Plastic Strain Problem Using the INISTATE Command

This initial plastic strain example is a simple 3-D problem where the cross section has three layers. An
initial plastic strain and stress are applied to one of the layers. One end of the block (shaped like a

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Example Problems Using Initial State