Density-Based Topology Optimization for a Defined External State of Stress in Individualized Endoprosthesis

DS 116: Proceedings of the DESIGN2022 17th International Design Conference

Year: 2022
Editor: Mario Štorga, Stanko Škec, Tomislav Martinec, Dorian Marjanović
Author: Patrik M
Series: DESIGN
Institution: Leibniz Universit
Section: Design Support Tools and Methods
Page(s): 533-542
DOI number: https://doi.org/10.1017/pds.2022.55
ISSN: 2732-527X (Online)

Abstract

Endoprosthesis are exposed to the risk of aseptic loosening. The design of the prosthesis shaft to achieve physiological force application is therefore of great importance. Additive manufacturing offers the potential to fabricate highly variable topologies, but challenges the designer with a large number of design variables. In this work, a method is developed to determine an optimized density topology that approximates a given mechanical stress state in the bone after implantation. For this purpose, a topology optimization of the density distribution of the implant is performed.

Keywords: healthcare design, additive manufacturing, topological optimisation, effect engineering, individualised hip endoprosthesis