MSC Nastran; Patran Tutorial - Linear Static Analysis of a 2D Axisymmetric Solid Video Lecture | Nastran: Basic Tutorial for Students - Design Softwares

in this video I will perform a linear
static analysis on a 2d axisymmetric
solid full details of this exercise on
page 355 of the link PDF in the video
description below I'll minimize this and
the first thing I'll go ahead and do is
create a folder called I'll call it
problem 1:06
start patrin
the units for this example will be in
inches pounds psi go ahead and start my
patron database and see if it's a
directory just made a moment ago I'll
click OK on the form on the right offers
start by creating 4 surfaces for three
actually so here I'll select surfaces
XYZ from the origin I'll define a vector
defining my width height and depth of
its surface
so here the vector is 6 and the X 0 and
the y 0 in the Z I click apply now let
me go ahead and reorient this so I see
it from the bottom then make another
surface with the vector of 2 0 10 and
the origin from which the vector begins
is for 0.5 click apply the next surface
has a factor of 6 0.5 and the origin
point is zero zero ten point five hit
enter now three surfaces now the problem
statement wants me to make a comparison
between the trio's six and a trio three
elements so I'll have to create a second
set of these three surfaces so under
geometry under transform click surface
here I will translate these three
surfaces 15 inches in the Y direction or
the Z direction so here I will type in
the vector of zero zero and 15
and I select these three surfaces
hold on go to the meshing tab and that
will apply some mesh seeds using the
uniform method so here I know that these
two serves have two elements and we need
a mesh seed with two elements these ones
will - these ones also for this curve I
know I need five elements so here at
type in five select this curve
automatically mesh seed click this curve
click this curve down this curve
sometimes you may accidentally slip and
click this curve there's an undo button
here in the top loft so then carefully
move your mouse and you will see it's
selected or highlighted so then click it
now it's been seated next I know that I
need 15 elements for these curves and I
need 20 elements for the other curves
so let me go ahead and mesh this using
surface mushroom dilemma shape is a tria
the first one we'll use a trio three
I'll go ahead and select these three
curves and click apply next we'll mesh
using trio six most like these curves
then click apply and notice I've
selected four five and six here let's
run in equivalence click apply you'll
see that there were duplicate notes here
and here in these two spots now I can go
ahead and define my materials by going
on the properties tab click isotropic
click and type material name as matte
under input properties my Young's
modulus is 10 e 6 psi and my Poisson
ratio is 0.33 click OK click apply in
order to apply this material to the
elements I'll have to create a 2d solid
property so here under 2d properties
click the 2d solid here under property
name call it 2d or solid prop the 2d
solid prop under options select
axi-symmetric under input properties
select this material click OK on your
application region select all the curves
add them to the application region click
OK let's click apply
now I can go to the load species tab
before that I'll display the model tree
so far I've defined my material and I've
applied the material to the elements
using the 2d solid property going back
to load B C's tab I would define my
displacement constraint I'll call it
symmetry under input data I wish to
restrain motion in the or translation in
the Z direction and about the y axis
so usually t1 t2 and t3 go to XY & z r1
r2 and r3 rotations about the x y&z here
I'm preventing translation in the z
direction and I'm preventing translation
about the Y click OK or select
application region you will need to
select the centerline of each section so
here I'll go ahead and use the thumb
method so the middle would be here added
in the middle of this would be here
click Add ok and apply now I can go
ahead and define my pressure
here under el-amin uniform click
pressure type the name as pressure these
are two dimensional elements so under
target element type click 2d under input
data the edge pressure is 1000 psi click
OK and reorient this again you look at
it from the bottom view under select
application region
here on the right you will want to
select the free edge of element make
sure that is on so I simply drag your
mouse and select the elements are
exposed click out there just like these
elements click Add you notice they turn
orange once selected click Add here do
the same thing but this time I'll zoom
in a little bit more so you see what I'm
doing
you'll see that come to basically at the
middle here add select and drag instead
of adding I can just hold the shift key
and continue to select element I just
click Add so you see the edges we
selected are highlighted in orange here
click OK and apply and then quickly
inspect this to make sure you haven't
accidentally applied it to anywhere else
so here I can turn off the markers for
the symmetry condition richer in blue
here and the pressure now that I'm done
setting up the model I can go to the
analysis tab and analyze the entire
model click apply and the job is
submitted to National Fair analysis once
that is done click xdb click apply to
import the result and the results tab
click under quick plot fringe
deformation I wish to view the radio
displacement so click translational
displacements here select the X
component and for deformation result
select
this so this gives you an idea of what
the deformation is like now in order to
make a proper comparison we'll look at
the trio three elements here at the
bottom so let me hide the model browser
tree go back to my results zoom out a
little so here are the radio
displacements for the three Noda
axi-symmetric model they have about one
point nine seven and three point one
seven so let me go ahead and switch to
fringe here I want to be translational
displacements X component is equivalent
in the other radio displacement or
radial component click apply before that
let me just select these elements these
are atria three elements so when I click
apply now only have results for these
elements notice is sort of difficult to
read the numbers here so I can go to
label style click fix maybe make it five
significant figures click OK and apply
and here it's essentially the same
values that would get here here the
radio stress is about twenty five
thousand and thirty three thousand so
when I go back here scroll down to
stress tensor
and here I've noticed the quantities von
mises when it should be X component so
here what we have is the 25,000 and-
33,000 and that is the same value we got
here for hoop stress we get a max of
30,000 psi and the minimum of negative
38 psi so nice which this to the white
component which is the hoop component I
get the same thing here and here now for
our actual stress we get 6,000 psi for
the max and minimum is negative 8,000 so
here move this to the z component click
apply now here I get 6,000 and negative
8,000 now for our tree of six elements
what I'll have to do now is here on your
target entities delete the ones there
and say I want to plot these elements
and I want to see the radial stresses so
here the max is 32,000 loss is negative
44,000 so when we compare this to this
we and we get the same results I switch
this to the hoop stress get negative 32
or 32,000 psi and negative 40,000 psi
I'm going to look at the answer there
and it's what we get the actual stress
is here and we get 1400 and negative
15,000 that's all we get maximum of
approximately 1400 and a minimum of
negative 15,000 clean it here make sure
save and this concludes this video