Shape optimization for contact problems based on isogeometric analysis

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Horn, Benjamin^1 ; Ulbrich, Stefan^1

TU Darmstadt, Germany^1

关键词: Elastic contact problems;    Finite element simulations;    Isogeometric analysis;    Mathematical optimizations;    Optimization problems;    Semismooth Newton method;    Shape optimization problem;    Trust region algorithms;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032008/pdf
DOI  :  10.1088/1742-6596/734/3/032008

来源: IOP

【 摘 要 】

We consider the shape optimization for mechanical connectors. To avoid the gap between the representation in CAD systems and the finite element simulation used by mathematical optimization, we choose an isogeometric approach for the solution of the contact problem within the optimization method. This leads to a shape optimization problem governed by an elastic contact problem. We handle the contact conditions using the mortar method and solve the resulting contact problem with a semismooth Newton method. The optimization problem is nonconvex and nonsmooth due to the contact conditions. To reduce the number of simulations, we use a derivative based optimization method. With the adjoint approach the design derivatives can be calculated efficiently. The resulting optimization problem is solved with a modified Bundle Trust Region algorithm.