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General Mechanical

General Mechanical

Topics related to Mechanical Enterprise, Motion, Additive Print and more.

Sheet Metal Bending – No Plastic Deformation

    • jc47948
      Subscriber

      Hello, I've been struggling for days trying to get the deformation to stay put (minus the elastic springback). Can I do this without a whole Multilinear isotropic hardening tabular data input in engineering settings? Or do I have no choice but to do that? I tried that and it solves for many hours then fails.

      Any help would be greatly appriciated, as I can't seem to get this to work! (I'm an ANSYS noob)

       

      Start^

      Pressed^

       

      Goes back no deformation^

       

      Displacement setting^

       

    • peteroznewman
      Subscriber

      The simplest plasticity material model is the Bilinear-Kinematic. All you need to define is a Yield Strength.  Use 0 for the Tangent Modulus. This will create an Elastic, Perfectly-Plastic material.

      You should remesh the flat plate and put at least 4 elements through the thickness. If you make the elements Linear, you should put 8 elements through the thickness.  This will help it stay bent.

      You should use a 2D Plane Strain analysis to save on the solution time.  You could also save some time by taking advantage of symmetry.

      You don't need 21 steps, you can do it with 2 steps, but you will need to increase the number of substeps to 100 Initial, 100 Minimum and 1000 Maximum.

      • jc47948
        Subscriber

        Peter, thank you so much for your help!!! I'm really starting to dig ANSYS mechanical, but have a lot to learn obviously. This is the second time you've helped me out and it is much appriciated.

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