7 Replies Latest reply on Sep 18, 2013 3:45 PM by Jared Conway

    Rubber Block

    Christopher Hardy

      Hi,

       

      Attached is a simple model of a rubber block (non-linear properties). I am having some problems with its material properties.

       

      I have satisfied all the necessary fields in order to define the material, but I think the stress-strain curve I am using is causing some problems (derived from experiment).

       

      Model details:

      • Symmetry constraint on 2 side faces.
      • Load currently just a 1 N force applied across top and bottom surface. (force vs time .dat file exist not applied yet to simply problem)
      • Automesh
      • Used reference geometry on bottom surface

       

      I am pretty sure the problem lies within the material properties. I have simplified all the variables and it seems to solve if I use a simple material

       

      Could someone please help. Thanks

        • Re: Rubber Block
          Jared Conway

          What version and sp?

           

          Have you spoken to your reseller about this?

           

          Just to confirm, with a linear material the problem solves without issue?

           

          What material model for nonlinear do you want to use?

           

          In the long run, what are you trying to learn from the study?

            • Re: Rubber Block
              Christopher Hardy
              1. Its a 2012-2013 SP5.0 I believe
              2. I have not spoke to the reseller no; I am with a university, trying to conduct research
              3. Yes it solved with linear material, say picking steel
              4. The model I would like to use is non-linear elastic, the material I am trying to model is under compression, the other methods seem like are for tensional purposes
              5. Learn how rubber behaves under an impact load. Specifically its Strain-rate dependecy