1 Reply Latest reply on Oct 29, 2018 9:50 AM by Bill McEachern

    fabric simulation-student

    Katherine G

      Hello,

      I am an undergrad student working on our senior design project. The component that we must model is very similar to the structure of a canopy, or a rectangular tent. We have been asked to simulate the loads on the fabric to determine where we should place the seams. The model of the fabric is complete, but we are having trouble with the simulation.

           In the simulation, we have been using the Simulation Advisor. We have treated it as a shell, and everything seems to go well until we reach Interactions. Our goal is to somehow have the simulation understand that the fabric is very strong in-plane, under tensile stress but everything else is flexible. Is this something we change in material properties? Is there a way to do this separate from applying just tensile loads to the fabric? They want a simulation for just gravity, as well as a simulation for wind load. We could apply the stress loads in the same places the frame would be attached to put in under tensile stress? Honestly, we just want to simplest solution to determine the best places to put seams. (Locations of tearing/maximum displacement.) Any advice would be greatly appreciated as we are novices in Simulation.

        • Re: fabric simulation-student
          Bill McEachern

          Just by being so thin and by having large spans that are unsupported (span here means relative to the thickness of the fabric) the fabric will not have any ability to support compressive loads without buckling. Buckling in FEA is more than a bit tricky. One would normally use a membrane element that does not have any bending stiffness which is not available in SWX Sim. The other thing is these problems are inhernetly non-linear as the normal to plane deformations are often more that 1/2 the thickness of the structural depth of the fabric (its thickness). If you have the non linear package then there are some techniques that may help you solve some aspect of this problem.