Abstract
Multi-material topology optimization has become a popular design optimization discipline since it allows to go a step further in topology optimization of the design of lightweight components and structures. However, it also presents additional challenges in terms of managing a higher complexity in the optimization problem, reliably estimating the manufacturing cost taking into account the cost of joining dissimilar materials, or assessing the manufacturability of the design. This paper proposes a set of methods that solve generic multi-material topology optimization problems, while including several novel aspects such as a comprehensive cost model, specific design rules for multi-material design, and model order reduction techniques to improve the computational efficiency. Two different examples, consisting of a sitting bench and a car cowling, have been solved in order to support the benefits of the approach.
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Acknowledgments
This study was performed in the frameworks of the OPTIMULTI ICON project. https://www.flandersmake.be/en/projects/optimulti.
Funding
This research was supported by Flanders Make, the strategic research centre for the manufacturing industry. The Research Fund KU Leuven provided support. The research of S. Jonckheere is funded by a grant of the Flanders Innovation & Entrepreneurship Agency.
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Replication of results
The results presented in this article can be replicated by implementing in MATLAB the methods and algorithms detailed in Sections 2, 3, 4, and 5.
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López, C., Burggraeve, S., Lietaert, P. et al. Model-based, multi-material topology optimization taking into account cost and manufacturability. Struct Multidisc Optim 62, 2951–2973 (2020). https://doi.org/10.1007/s00158-020-02641-0
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DOI: https://doi.org/10.1007/s00158-020-02641-0