15 Replies Latest reply on Mar 19, 2013 7:07 PM by Radoslaw Koneczny

    Need some help simulating NonLinear displacement graph

    David B

      Hello everyone,

       

      I want to find a non-linear displacement graph of a Silicone membrane when applying different uniform pressure on it.

      This is what I do:

      I have a round membrane with 20 microns radius and 1 micron thickness made of silicone that is clamped around perimeter as you can see in the picture below.

      1.PNG

      I add uniform pressure that is normal to the surface of the membrane.

      Then I run the analysis and get the displacement.

      2.PNG

       

      The problem is that if I double the pressure the displacement result is doubled as well and I know that it should not be this way. What am I doing wrong? Maby I should use another analysis method or change something in the model? Any help would be apprecierated

       

      Best regards,

      David

       

      P.S. I am using the Static simulation tool.

      As for material properties I used:

      Elastic Modulus in X1.48e+011N/m^2
      Poisson's Ration in XY0.1773N/A
      Mass Density2329kg/m^3