In the following input listing, initial stress loading data is read in from a file. The data is read in during
the first load step, and establishes a preliminary deflection corresponding to a tip loaded cantilever
beam with a tip load of 1e5 units.
/prep7
/title, Example of Initial stress import into ANSYS
et,1,182
! Plane stress PLANE182 element
mp,ex,1,1.0e9
mp,nuxy,1,0.3
!
! Define the nodes
!
n,1
n,2,2.0
n,3,4.0
n,4,6.0
n,5,8.0
n,6,10.0
n,7,,1.0
n,8,2.0,1.0
n,9,4.0,1.0
n,10,6.0,1.0
n,11,8.0,1.0
n,12,10.0,1.0
!
! Define the 5 elements
!
e,1,2,8,7
e,2,3,9,8
e,3,4,10,9
e,4,5,11,10
e,5,6,12,11
! Constrain all dofs on all nodes at x=0 to be zero
nsel,s,loc,x,
d,all,all
nall
finish
!
/solu
! Read in the initial stresses from istress.ist file
! as loading in the 1st load step.
! Input stresses correspond to the element integration
! point location.
!
inistate,read,istress,ist
! List the initial stresses
inistate,list
outres,all,all
solve
finish
!
/post1
set,last
prnsol,u
finishThe INISTATE,WRITE command specifies the coordinate system into which the data is to be written.
4.6.2. Example: Initial Stress Problem Using the INISTATE Command
You can apply constant stresses to all selected elements by issuing a INISTATE,DEFI,ALL command. The
INISTATE command can also delete stress from individual elements after the stress is applied. The
INISTATE,LIST command lists the applied stresses. The following input listing shows how these commands
are used.
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