General Information

Shape optimization is mostly used at the end of the design process when the general layout of a component is more or less fixed and only minor changes and improvements are allowed.

In the following figure an example of nonparametric shape optimization is demonstrated. (Pictures by courtesy of Audi AG).

Typically, the objective function is to minimize stress concentrations. Based on the results of a stress analysis modifications of the surface geometry of a component are performed until the required stress level is reached. This process is usually carried out manually by trial-and-error.

SIMULIA Tosca Structure.shape allows an automatization of this improvement process. The surface geometry of a given FE model is modified iteratively based on the FE results, such that the required optimization target is reached. The start model is taken from an existing design, which should be improved, or from a previous topology optimization.

SIMULIA Tosca Structure.shape enables you to perform the following tasks

  • Minimization of the equivalent stress
  • Maximization of selected natural frequencies

Under the possible restrictions:

  • Specification of a volume constraint
  • Surface-based manufacturing constraints for casting, forging, stamping, extrusion and drilling
  • Minimum and maximum member size
  • Symmetry constraints
  • Specification of design domain restrictions by FE meshes
  • Mesh adjustment and mesh smoothing in each optimization cycle

Additional functionalities like optimization using durability results are available with SIMULIA Tosca Structure.durability. Functionalities like optimization using nonlinear results or optimization of contact areas are available with SIMULIA Tosca Structure.nonlinear.