Integration of multi-objective structural optimization into cementless hip prosthesis design: Improved Austin-Moore model

Abstract

A new strategy of multi-objective structural optimization is integrated into Austin-Moore prosthesis in order to improve its performance. The new resulting model is so-called Improved Austin-Moore. The topology optimization is considered as a conceptual design stage to sketch several kinds of hollow stems according to the daily loading cases. The shape optimization presents the detailed design stage considering several objectives. Here, A new multiplicative formulation is proposed as a performance scale in order to define the best compromise between several requirements. Numerical applications on 2D and 3D problems are carried out to show the advantages of the proposed model.

Keywords:

• Artificial hip prosthesis
• finite element analysis
• multi-objective optimization

Acknowledgements

The author would like to acknowledge Dr. Mathias Wallin from Lund University for his valuable discussion and comments in the optimization aspects.