5 Replies Latest reply on May 23, 2013 11:33 AM by Graeme Hyson

    Setting up Orthotropic Material

    Nick Christensen

      Hi all,

      I need some help setting up an orthotropic material in Simulation. My part has carbon Uni that is wound radially over the exterior of a metal body (imagine holding carbon uni towpreg and letting it wrap onto something that is spinning in a lathe). So when Solidworks is asking me for Elastic Modulus in X Y and Z this doesnt really apply... I need to enter the modulus in the radial direction..

      does this make sense? Any help is much appreciated.




        • Re: Setting up Orthotropic Material
          Jared Conway

          Use an axis for your reference instead of a plane.

          • Re: Setting up Orthotropic Material
            Lauren Spare

            When you're setting up the material, the uni still has different properties in the x, y, and z (if you think of it as planar, i.e. before you wrap it onto the metal part).  You should be able to get those values from the manufacturer and plug them into the material data.  Then, when you apply the material to your part, do as Jared said and use an axis for reference.  See this page for how it should "wrap" when you're done.

            • Re: Setting up Orthotropic Material
              Graeme Hyson

              This is somethign I've looked at a lot - my previous role was in a company who specialised in filament winding (the proper name for the process you describe).  I see the help file now tells you which way X, Y and Z are in a cylindrical system, you've no idea how long it took me to figure that out in about 2008!


              Apolgies if I'm teaching you to suck eggs here, but remember that the material's quoted 1-2-3 properties won't apply to your final lamiante properties in SolidWorks.  You first need to define a lamiante (i.e. define the angle you're winding at etc.) and work out overall laminate properties using classical laminate theory or similar.  Only then can you input properties into SolidWorks.


              For example, if you wind your UD at a shallow angle/high pitch the final composite hoop strenght will be significantly different to the UD strength along the fibres.

              • Re: Setting up Orthotropic Material
                Nick Christensen

                Thanks everyone for your help.

                I'm hoping to have a good look at this tonight in more depth. Yes our process is like fliament winding where I'm only applying 90° fibre. This makes the CLT quite easy .

                Again, thanks for your help, I'll let you know how I go.