How To Define Element Properties in Patran 2010
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How To Define Element Properties in Patran 2010


This video will show you how to define element
properties using Patran 2010 I’ll be using this model in Patran to show you how to create 1D, 2D, and 3D finite element properties
using Patran so I’ll begin by defining the properties for my
1D elements that are along this meshed curve here on the bottom so from the properties tab under 1D properties I want to define beam properties for those elements so my action, object, and type are:
Create, 1D, Beam I’ll go ahead and give this property set a name I can then click Input Properties and I need to select my material that will be
applied to these elements Now I can click on the materials icon and
see that I already have an existing material defined in my database if I didn’t I would need to go back and define my material properties first before I can then apply them to the element properties so I’ve selected my material the next thing I am going to do is I’m going to define
the section the cross-section that I want to apply along this 1D beam so I can choose from a variety of different
shapes here but I can see that there is an I-beam and that’s the section that I want so I’ll give
it a name and then define my height and width and thickness values to represent my beam section in this case I have a height and width of one and all of my thicknesses are 0.25 once I entered the appropriate values I can then click calculate and display to have Patran draw the section for me this is the cross-section as it will be applied to those 1D elements so I can look at this and make sure that the
dimensions are right and I can see that they are, it’s one unit high,
one unit wide with a quarter inch thickness but also looking at this the [1D] elements themselves will be like coming
out of the screen so this section will always be applied normal to my elements but what I still need to define is how it will be placed rotationally so I can look at this and see the way this is defined the web of my beam is vertical so when I apply this section to my elements I want to keep an orientation that will [be correct] I need to properly align my web and that’ll be our next step so I can click OK and now I need to define a bar orientation
vector so as I applied that I cross section that I defined along my 1D elements here I want it to be oriented the same way as these
other I beams again with the web oriented along the global Y direction or lying in the X-Y plane so for my bar orientation I’m going to enterthis will define that X-Y plane when used with the X direction which the element lies in so the one orientation vector that I couldn’t
use would be along the element direction which in this case is along our global X so the with my orientation in the Y direction I can go ahead and click OK now I need to select my application region so which elements in my model will this property be applied to? I’ll apply it to all of the elements on that
curve I’ll click Add, OK, and now I can click Apply and create my 1D beam
elements now if I want to view these element properties and see that they’ve
actually been applied the way that I intended I can go to display Load/BC/Element Props and scroll down and select a 3D beam display so I click Apply and now I can see how those element properties are being rendered
on my finite elements so what we’ve done here is we’ve used the
element properties in applying a constant cross-section to make up for the geometry information or
the spatial extent that was missing from the elements themselves. and I can rotate the model and see that
I did in fact get that beam orientation correct if I could use a different orientation vector like say one unit in the Z this would be turned ninety degrees on its side and would obviously provide different behavior. So that’s how you define your 1D element
properties now I want to define the properties for the
2D elements of my model so for 2D properties I want to define my shell so I’ll create a 2D shell I’ll give this property set a name and again click Input Properties now here I don’t have to worry about the
orientation because all of my surfaces already provide that information; all of
these elements already have a direction they just need a thickness applied to them so I need to tell it what material to apply to these elements
and again it will be our aluminum and then also what thickness to apply as currently currently these elements have no thickness so my thickness value will be 0.25 now i can click OK and select my application
region and I’m going to select all of the surfaces that form this 2D I-beam model I can Add, OK, and Apply and so now I have created my 2D element
properties that defined the thickness and material for all of these 2D finite elements so now finally I’m ready to define properties
for my 3D finite elements in my model so under 3D properties I’ll select Solid and this will create a 3D solid I’ll give this property set a name and input its properties now the only required property for solid elements, because remember they already represent the entire
spatial extent of our model, is what material to apply to them. So in this case I will again select our aluminum
material click OK and then select my application region which in this case will be my entire solid I Add, OK, and Apply and now I’ve defined my
3D element properties SO as we’ve seen, the more complex the spatial extent of the element is like in the case of the 3D elements, the less we have to define through our element
properties but here in this one model we’ve shown you how to define your 3D, 2D, and 1D finite element properties so this should cover most of the situations that you run into in your finite element models.

4 Comments

  • Carlos Cintra

    Please, I just installed 2014 student version, I was trying to show the 3D full span, however it does not show the bar element, just keep the curve on screen… the strange is that i follow exctely as you did..

  • Joseph Ohajunwa

    Hi thanks for this video. I am looking for any tutorial that will show me how to use linear gap elements to model contact?

  • Sam Parfitt

    If you are analysing a 3D beam structure, with beams in all 3 dimensions, do you have to have a different property set for the vertical beams for example?

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