Print Email Facebook Twitter Overhang control in topology optimization Title Overhang control in topology optimization: a comparison of continuous front propagation-based and discrete layer-by-layer overhang control Author van de Ven, E.A. (TU Delft Computational Design and Mechanics; Royal Netherlands Aerospace Centre NLR) Maas, Robert (Royal Netherlands Aerospace Centre NLR) Ayas, C. (TU Delft Computational Design and Mechanics) Langelaar, Matthijs (TU Delft Computational Design and Mechanics) van Keulen, A. (TU Delft Computational Design and Mechanics) Date 2021 Abstract Although additive manufacturing (AM) allows for a large design freedom, there are some manufacturing limitations that have to be taken into consideration. One of the most restricting design rules is the minimum allowable overhang angle. To make topology optimization suitable for AM, several algorithms have been published to enforce a minimum overhang angle. In this work, the layer-by-layer overhang filter proposed by Langelaar (Struct Multidiscip Optim 55(3):871–883, 2017), and the continuous, front propagation-based, overhang filter proposed by van de Ven et al. (Struct Multidiscipl Optim 57(5):2075–2091, 2018) are compared in detail. First, it is shown that the discrete layer-by-layer filter can be formulated in a continuous setting using front propagation. Then, a comparison is made in which the advantages and disadvantages of both methods are highlighted. Finally, the continuous overhang filter is improved by incorporating complementary aspects of the layer-by-layer filter: continuation of the overhang filter and a parameter that had to be user-defined are no longer required. An implementation of the improved continuous overhang filter is provided. Subject Additive manufacturingFront propagationOverhang angleTopology optimization To reference this document use: http://resolver.tudelft.nl/uuid:54949882-4eaf-417d-8df8-6b7e01a86fce DOI https://doi.org/10.1007/s00158-021-02887-2 ISSN 1615-147X Source Structural and Multidisciplinary Optimization, 64 (2), 761-778 Part of collection Institutional Repository Document type journal article Rights © 2021 E.A. van de Ven, Robert Maas, C. Ayas, Matthijs Langelaar, A. van Keulen Files PDF Ven2021_Article_OverhangC ... yOptim.pdf 2.2 MB Close viewer /islandora/object/uuid:54949882-4eaf-417d-8df8-6b7e01a86fce/datastream/OBJ/view