How To Create Materials in Patran 2010

This video will show you how to define material properties
using Patran 2010
I've now opened up blank database in Patran and I'm ready to define my material properties
I'll select the properties tab
and notice on the left that I can create an isotropic, orthotropic,
anisotropic, fluid,
or composite materials
in this case I'm going to create just a simple isotropic material
Clicking on Isotropic sets the action, object, and method to Create, Isotropic, and
Manual Input
I'll enter a name for this material, in this case aluminum
then I'll click on input properties
to define my material properties for the aluminum
I'll enter an elastic modulus
of 10 times 10 to the 6th [10e6]
and a Poisson's ratio of 0.3
now this is enough information
for a linear elastic material to be defined
density is optional, and is only required if
you need mass properties in your model. I'll go ahead and enter it just in case
also note that have the option of entering a thermal expansion coefficient or a reference
temperature if these were required
for the material in my model
Now I'll go ahead and click OK
and Apply
and I can see that aluminum shows up under my existing materials
so I've defined this material
Now I could go on and define
additional materials to be used for other portions of my model
or I could apply this material to part of my model using element properties
defining materials and applying them to your model is really a two-step process in Patran
we've done the first step here
where we defined the material properties
and the next step we'll show you later
where using element properties
you apply a certain material to a certain portion of your model.
Next i'd like to show how to create a more complicated material
in this case
I'll create a 2D orthotropic material
my action, object, and methos are Create, 2D Orthotropic, and Manual Input
I'll enter a material name
in this case graphite tape
I'll click input properties
and now notice that I have more values available to enter
I have an elastic modulus in two different directions
a Poisson ratio
and three different shear modulus values
in this case they'll all be the same
but note that they could be different
based on the material that you're using
I also could define density, but in this case since I don't need it I won't
I can then click OK,
and Apply
and now I've defined
the linear elastic constitutive model for my graphite tape
but I want to go further and define a failure constitutive model
so I click Input Properties
I'll change the constitutive model to Failure
my failure limits will be stresses
and I'll use Hill composite failure theory
now I can enter tension stress limits
note that I can enter different values for each direction
just like I had different
modulus values
I can also enter compression stress limits
and then sheer stress limit
and bonding stress limit
once I've entered these values that I want
I can then click OK,
and Apply
and now I've defined an additional constitutive model providing more information defining
my graphite tape material
If I click on change material status I can see that this material now has two active constitutive
models:
my linear elastic properties that I defined first
and the failure properties that I just entered
by clicking on these here I can choose to make
certain constitutive models either active or inactive.
In this case I want them both to be active
my next step in defining my material
will be to go ahead and define
my composite laminate that will use my graphite tape material
so under composites
I can select laminate
and this opens the laminated composite form
and sets my action, object, and method to Create, Composite, and Laminate
I can enter a name for this new Laminate that I'll create
and I'll call it 8ply_symmetric
because as we'll see I will define a symmetric lay up
for my composite
I can click on the existing materials that I want to use
and each time a click on this it adds a row
or another layer to my laminate
in this case I want eight layers
so I've defined this graphite tape as my material
for all eight layers
I can also define my thickness
in this case I'll use 0.0054
for all eight layers
and now I can define the orientation
of each layer in the laminate
so I'm defining my lay up right here
I'll start with a
zero degree rotation
then do a forty five degree
then a negative
forty five degrees
then two layers
at ninety degrees
and then because this
a symmetric lay up
we'll have a negative forty five degree
and then a forty five degree
before
having the final layer
be zero [degrees]
So now I've defined
my material, thickness, and orientation for each of the eight layers in my laminate
I can then
click Apply
and see that I've created an eight ply symmetric composite
this material is now available for me to use
if I were defining element properties
for portions of my model
So if I am in the element properties form and I go to select my existing materials
I can see that I now have three different materials to choose from
the symmetric laminate
my simple isotropic aluminum that I defined
or my graphite tape
2D orthotropic material that I defined
so these are all of the materials
that are defined in my database
now notice that in this database I started with a blank database
with no geometry or finite element model
I can define my materials at any point in the process of modeling in Patran
so I can take advantage of this if there are materials that I use commonly
and define them first
and then save that database and use it as a template or starting point
for all of my future analyses
and then when I get to the point where I need those material properties
they'll already be defined in my Patran database