MSC Nastran; Patran Tutorial - Nonlinear Static Analysis; Large Deflection Video Lecture | Nastran: Basic Tutorial for Students - Design Softwares

in this video or perform a nonlinear
static analysis to study the largest
deflection effects of a loaded plate
full details let's exercise our on page
374 of the link PDF in the video
description below the first thing I'll
go ahead and do is create a directory
called problem 9 and I'll start patran
for this example there are no units so
here click new to creating a new patch
on database and save it to the directory
you just made click OK on the form on
the right create your geometry by going
to this tab and use the XYZ method to
make a surface since wool model just a
porter session of the entire plate my
surface is to have a width of 100 a
height of 100 and 0 in the Z direction
so click apply here now we see a surface
here create your material by going to
the properties tab and click isotropic
material name is mat and your input
properties your Young's modulus to e 11
or Poisson ratio is 0.3 click OK click
apply material has been created as shown
here so apply this material to the
surface
go to the 2d properties group and select
shell here call this property under
input properties select the material you
just created and your thickness is 1
click OK under select application region
select this surface added ok and apply
we see property set property is created
so apply your boundary conditions go to
this tab
here under displacement constraint your
new setting should be fixed
grandpa data you were to fix translation
in the XY and z direction and rotations
about the XY & z click OK for
application region
I just wish to select curves so click
this curve icon here select this curve
and add it select this curve remove it
if you have to and that it click OK and
apply you see the boundary conditions
have been applied create a new one and
call this once in X under input data you
wish to prevent transition in the comma
Y Direction common blank and then the
fourth direction so 0 comma comma closed
so here
translation about and the Y is allowed
and translation in the third Direction
is loud rotation about the force were
about the ax is not allowed rotation
about the 5th and 6th R actions are
allowed the fitness extractions are the
y&z rotations click OK your application
region make sure the curve is selected
here select this top curve surface one
to add it ok and apply make a new one
called sim Y and your Impa data prevent
translation in the X which is the one
direction
don't leave everything else blank
prevent translation in the fifth
direction
so the one is fixed and the fifth is
fixed
click OK for application region select
this left kerb add it ok and apply now
you'll see it's sort difficult to read
this so you can go to the home tab turn
on the model tree under lb C's you can
turn off the save the fixed boundary
condition or the Sun Y and you can
better read the values here and one last
thing I have to do is apply my pressure
so here click pressure call it pressure
since my elements will be
two-dimensional I will switch this to 2d
under info data I will apply a top
rusher of tv4 click OK for your
application region select this surface
are you select this surface icon here
select this surface added ok and apply
so now you can see pressure is added let
me go ahead and mesh this so here are
under surface measures galva option of
using quad 4 quad 5 and so on sorts of
elements I'll use quad 8 select this
surface and apply or if I want to refine
the mesh I can select the global edge of
length of 20 uncheck this automatic
calculation and hit apply you'll be
asked to remesh this and you say yes for
all
now all the mash is smaller I can
minimize the water browser screen and
move over to my analysis section here
click analyze entire model under
solution type we won't be doing a linear
static analysis we'll be doing an
implicit nonlinear analysis so make sure
this is selected or bubbled make sure
the solution sequence says 400 under
solution parameters
review the results here are the options
to make sure nothing here
make sure the defaults are are here
click cancel click OK there under sub
cases modify your default sub case and
your sub case parameters turn large
displacements off by selecting none
or actually leave this on but turn no
the turn follow follow
turn your fall our loads off click ok
and apply counsel here Alice I want to
do is go back to solution type under
solution parameters and under results
output format I want to make sure I have
XD be checked click ok ok ok here and
apply it to submit the job
I mean minimize the or hi the model tree
under analysis I import my X DB file and
apply let me clean this up I'm gonna go
to the results tab look at my quick plot
here want to look at the displacements
translational and the Z direction and
I'll select deformation to actually show
the deformation and I click apply I get
a negative two point two one inches in
the middle of the plate we're gonna
compare this to the value I should get
for the plot eight and that is in fact
what I do get a 2.21 here if I were to
use Quad four elements I would actually
get out one point two not a two point
two eight where one point two six and
two point one make sure to save a file
and this concludes this example