generative modeling for Rhino
My form-finding method had become capable treating nonlinear elastic materials. I.e. this method is theoretically identical with FEM. Now, not only metals but rubbers can be handled.
In the first half, a rubber with Poisson's ratio=0 is compressed. In the next half, the material is switched to metal material (St.Venant's material). Due to Poisson's ratio=0, the shape deforms to a shape straight along the vertical line. Finally, Poisson's ratio is set to 0.48 so that it deforms horizontally. But the ratio of deformation along horizontal line of the metal is less smaller than that of the rubber.