Mechanical APDL Basic Analysis Guide

d,all,all,0.0! Fix one end

nsel,all

solve

save

finish

/post1

set,last

esel,s,elem,,1

/com -----------------------------------------------------------------------------

/com, Expected result: You should see newly redistributed stresses and strains in

/com, all layers

/com -----------------------------------------------------------------------------

layer,1

presol,s,comp

presol,eppl,comp

layer,2

presol,s,comp

presol,eppl,comp

layer,3

presol,s,comp

presol,eppl,comp

finish

4.6.5. Example: Initial Creep Strain Problem Using the INISTATE Command

This initial creep strain example demonstrat es how you can use initial creep strain from one analysis,
then continue the problem to perform a second step.

In Analysis 1, creep strains are calculated up to TIME = 100 in the first step, and then the analysis is
continued up to TIME = 200 in the second step.

In Analysis 2, initial state data generat ed at TIME = 100 is used as the starting point, and the creep
analysis is performed only for TIME = 100 to TIME = 200.

The two analyses generat e the same results, validating the use of initial creep strain.

!***************************************************************

! Analysis 1: Multiple Steps *without* INISTATE

!***************************************************************

! Read the FE Model from the CDB File. FE Model has both Plasticity and Creep Material Models Defined.

/prep7

CDREAD,ALL,geom,cdb

! Perform a two-step sample creep problem

/SOLU

RATE,OFF

SOLCONTROL,ON

/OUT, scratch

TOFFST,273,

TIME,1E-6

AUTOTS,0

NSUBST,1

KBC,0

SOLVE

! Step 1: Generate initial state information

RESCONTROL,,2,10

RATE,ON,ON

TIME,100! Reduced time for faster solution run time.

Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information

Example Problems Using Initial State