5 Replies Latest reply on Jul 15, 2014 7:05 PM by Nayshil Singh

    Shell to shell bonding help

    Nayshil Singh

      I am a bit of a newbie with Simulation and have this project I am working on but am having some difficulties with bonding.  In the model attached, you will see I have two shells, both with thickness defined, fixtures defined, and forces defined.  For some reason, my shell to shell bonding is not working as it seems from the results I get.  The displacement of one of the components is too high and there doesn't seem to by any interaction with that component and the other.  I have tried numerous approaches without success.  I tried different faces, edge combinations, different thickness, forcing a gap in between the two shells.  The only thing that allowed me to use an automatic global bonding contact set was to force a small gap between the shells. The model I have attached has these auto generated contacts applied.  Can someone please point me in the right direction as to how I can get the two shell components bonded together?  The model attached is a 2014 model.

       

      Thanks

      Nayshil.

        • Re: Shell to shell bonding help
          Jared Conway

          the bonding in the file doesn't make sense to me

          why wouldn't you bond the faces that overlap?

          you're choosing faces that are essentially perpendicular to each other for the bonding as far as i can see

          some screenshots would be really helpful to understand what you're trying to connect

          and as someone learning how simulation works, i'd suggest doing some tests at smaller levels to get an understanding of how the software works

            • Re: Shell to shell bonding help
              Nayshil Singh

              Thanks for your reply Jared.  I have made the changes you talked about but unfortunately the result has not changed.  It still does not calculate the bonding placed on the component.  You can see in the image of the bonding changes made and the result obtained.  Why is that component in red not interacting with the other component?

               

              Bonding.PNGresult.PNG

               

              Thanks

              Nayshil.

                • Re: Shell to shell bonding help
                  Nicholas Luyster

                  Hi Nayshil,

                   

                  Try creating split lines where you have contacting faces. Click here to see how a split line is made.  Also, if you're converting solids to shells, keep in mind that the converted face is the face which you should be selecting for the contact. 

                   

                  If this doesn't help, please feel free to upload an updated file set.

                   

                  All the best,

                   

                  Nick Luyster

                  Gosimulation.com

                  Online SolidWorks Simulation Training

                    • Re: Shell to shell bonding help
                      Jared Conway

                      i'd also recommend setting up some test cases to get a good understanding of shell to shell bonding

                      what happens when there is a gap

                      when there is no gap

                      do they auto bond

                      what happens with contact set

                      is there an effect based on element size

                       

                      these all have effects on the ability for the software to bond 2 faces

                      without seeing your updated model it is hard to comment on the cause of the issue

                      • Re: Shell to shell bonding help
                        Nayshil Singh

                        Thanks very much Nicholas and Jared.  Much appreciated!  The combination of splitting the correct face in the overlapping region and applying the bonding to the correct shell face is what's caused this to work.  I think the reason behind my confusion is that Simulation warns you that you are not selecting the correct face/edge combination when creating fixtures but does not warn you when creating bonds.  This leads you into believing the contact sets selected are good when they are actually not.  I can now begin to do my test cases to see the effect of different bonding sets.

                         

                        Thanks

                        Nayshil.