4 Replies Latest reply on Mar 7, 2016 9:35 PM by Frank Schoenherr

    Simulated displacement incorrect based on manual calculation

    Frank Schoenherr

      Der all,

       

      I am working on a case study and I am required to design machine elements with a maximum displacement of 1/1000.

      As a "proof of concept" i have taken a sheet metal and calculated the maximum expected force on its surface.

       

      I need to determine the maximum span between beam members for a given sheet metal.

      I have chosen a 5mm cold rolled sheet metal:

      • 5mm thick
      • 1220mm wide

      To determine the vertical deflection, I need to obtain first the Second moment of inertia, which is Ix = (1220 x 5^3) / 12 = 12,708

      To determinate now the deflection, I have used the following equation for equal distributed force:

      y=(5 x F x L^3) / (384 x E x Ix) = (5 x 2.36kN x 200mm^3) / (384 x 200 x 12,708) = 0.097mm

       

      To simulate the same I took SimulationXpress and created a part as described above and applied the same force to it.

      However, when I create the report, the maximum displacement is not near the calculated value of 0.097mm, it is shown on page 7 with 0.021mm. I have attached the generated report for your reference.

       

      Do you have any idea what I am missing?

       

      Note: I am working with the current Student Edition.

       

      Thank you, Frank