! results file for later postprocessing
! select the nodes located at right end and constrain their radial (x) and
! axial (y) direction displacement to be zero.
nsel,s,loc,x,radius
d,all,all
! select the nodes located at left end and constrain their radial (x) direction
! displacement to be zero.
nsel,s,loc,x,0.0
d,all,ux,0.0
! define the load for load step 1.
! select the nodes located at top surface of plate and apply a uniform pressure
! of 0.125 n/m^2 as dead load on the plate.
nsel,s,loc,y,thick
sf,all,pres,0.125
alls! select all nodes
! define the number of substeps (10). also define maximum number of
! substeps (50), and the minimum number of substeps (5) for the automatic
! time stepping algorithm.
nsub,10,50,5
solve! solve load step 1
f = 0.01! define the parameter, f, used to apply
! the cyclic point load.
! over six load steps apply a cyclic point load of magnitude f = 0.01 units
! applied at the center of the plate over three cycles
! **
! start cycle 1
! **
nsel,s,node,,ntop
f,all,fy,-f! define load for load step 2
nsel,all
nsubst,4,25,2! set the number of substeps, max and min number
! of substeps
solve! solve load step 2
nsel,s,node,,ntop
f,all,fy,f! define load for load step 3
nsel,all
nsubst,4,25,2! set the number of substeps, max and min number
! of substeps
solve! solve load step 3
! **
! start cycle 2
! **
nsel,s,node,,ntop
f,all,fy,-f! define load for load step 4
nsel,all
nsubst,4,25,2! set the number of substeps, max and min number
! of substeps
solve! solve load step 4
nsel,s,node,,ntop
f,all,fy,f! define load for load step 5
nsel,all
nsubst,4,25,2! set the number of substeps, max and min number
! of substeps
solve! solve load step 5
! **
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Example Nonlinear Analysis (Command or Batch Method)