Topology Optimization Subject to Additive Manufacturing Constraints
Author | : Moritz Ebeling-Rump |
Publisher | : |
Total Pages | : 228 |
Release | : 2019 |
ISBN-10 | : OCLC:1164546569 |
ISBN-13 | : |
Rating | : 4/5 (69 Downloads) |
Book excerpt: In Topology Optimization the goal is to find the ideal material distribution in a domain subject to external forces. The structure is optimal if it has the highest possible stiffness. A volume constraint ensures filigree structures, which are regulated via a Ginzburg-Landau term. During 3D Printing overhangs lead to instabilities, which have only been tackled unsatisfactorily. The novel idea is to incorporate an Additive Manufacturing Constraint into the phase field method. A rigorous analysis proves the existence of a solution and leads to first order necessary optimality conditions. With an Allen-Cahn interface propagation the optimization problem is solved iteratively. At a low computational cost the Additive Manufacturing Constraint brings about support structures, which can be fine tuned according to engineering demands. Stability during 3D Printing is assured, which solves a common Additive Manufacturing problem.