2 Replies Latest reply on Mar 24, 2010 4:48 AM by 1-LB43TI

    Shell Delamination/Separation under Stress

      I admittedly work in the world of solid elements 95% of the time, but I can't find a solution to this issue and would appreciate any input. I basically have a large box frame weldment consisting of c-channels and I-beams in an assembly (as surface parts). The frame is subject to large temperature gradients, and I am interested in the developed stresses, particularly at the joints. The thermal model runs fine and produces a reasonable temperature distribution. When I port that temp data into a shell-mesh static analysis, I am getting separation of I-beam flanges (within I-beam shell parts) at several points.

       

      Attached is a single beam component subject to a representative temperature gradient and constraints. It, too, is separating along the web/flange interface. The problem happens with both thick and thin shell formulations. Also, at very high mesh density, my assembly produces NO stresses. Any thoughts?

       

      Thanks for the help.

       

      Brian

       

      Solidworks Simulation Premium 2010 SP2.1

        • Re: Shell Delamination/Separation under Stress

          On closer inspection, it looks like the lower flange (the one that is separating) is not meshing node-to-node with the web, which the top flange is. Any thoughts on enforcing compatible meshing along that interface? One idea would be to construct the I-beam of two C-channels back-to-back, but that seems like a pain.

           

          How do you structural guys handle this?

           

          Brian