Articles techniques et présentations

The deformation of one dot of tactile display for visually impaired is examined by Finite Element Method (FEM) in COMSOL Multiphysics® software. A dot with rubber-like material (Polydimethylsiloxane for Sylgard 186) can be described by a circular membrane with Ogden model, which is a well-known hyperelastic material model. For determination of the parameters of the Ogden models simple tension test were executed. The curve fitting occurred by MATLAB® functions based on non-linear least squares optimization. Unfortunately the parameters of the second order Ogden model cannot be determined unambiguous -- some more further measurements should be necessary, however significant results are managed to achieve in the given topic.