The present thesis covers nonlinear hyperelastic constitutive laws in the context of topology optimization. Therein, a Venant-Kirchhoff, a Neo-Hookean, a Mooney-Rivlin and a Yeoh approach are evaluated to model polyether ether ketone (PEEK). Additionally, the plane stress assumption and a compressibility approach similar to available material options in ABAQUS are incorporated. The Yeoh model provides the best fit to the given experimental data and therefore is further investigated in the topology optimization. To actively control failure mechanisms of the material and stay within valid stress and strain magnitudes of the material model, a stress constraint based on the Cauchy stress measure is formulated. Together with a displacement constraint at the input node and a volume constraint, a displacement inverter problem is examined. It yields that material nonlinearities only have a minor impact on the topology, with the largest deviations within hinge areas.     «

The present thesis covers nonlinear hyperelastic constitutive laws in the context of topology optimization. Therein, a Venant-Kirchhoff, a Neo-Hookean, a Mooney-Rivlin and a Yeoh approach are evaluated to model polyether ether ketone (PEEK). Additionally, the plane stress assumption and a compressibility approach similar to available material options in ABAQUS are incorporated. The Yeoh model provides the best fit to the given experimental data and therefore is further investigated in the topolog...     »