TY - JOUR
T1 - Overhang control based on front propagation in 3D topology optimization for additive manufacturing
AU - van de Ven, Emiel
AU - Maas, Robert
AU - Ayas, Can
AU - Langelaar, Matthijs
AU - van Keulen, Fred
PY - 2020
Y1 - 2020
N2 - It is attractive to combine topology optimization (TO) with additive manufacturing (AM), due to the design freedom provided by AM, and the increased performance that can be achieved with TO. One important aspect is to include the design rules associated with the process restrictions of AM to prevent the requirement of relatively large support volumes during printing. This paper presents a TO filter that enforces a minimum overhang angle, resulting in an optimized topology that is printable without the need for support structures. The filter is based on front propagation, which, as it is described by a PDE, allows for a straightforward application on unstructured meshes, to enforce an arbitrary overhang angle. Efficient algorithms developed for front propagation are used in combination with adjoint sensitivities, in order to have a minor influence on the total computational cost. The focus of this work is on the implementation of the filter for high resolution 3D cases, which requires development of the front propagation for tetrahedral elements, and its parallelization.
AB - It is attractive to combine topology optimization (TO) with additive manufacturing (AM), due to the design freedom provided by AM, and the increased performance that can be achieved with TO. One important aspect is to include the design rules associated with the process restrictions of AM to prevent the requirement of relatively large support volumes during printing. This paper presents a TO filter that enforces a minimum overhang angle, resulting in an optimized topology that is printable without the need for support structures. The filter is based on front propagation, which, as it is described by a PDE, allows for a straightforward application on unstructured meshes, to enforce an arbitrary overhang angle. Efficient algorithms developed for front propagation are used in combination with adjoint sensitivities, in order to have a minor influence on the total computational cost. The focus of this work is on the implementation of the filter for high resolution 3D cases, which requires development of the front propagation for tetrahedral elements, and its parallelization.
KW - Additive manufacturing
KW - Front propagation
KW - Overhang
KW - Topology optimization
UR - http://www.scopus.com/inward/record.url?scp=85086704821&partnerID=8YFLogxK
U2 - 10.1016/j.cma.2020.113169
DO - 10.1016/j.cma.2020.113169
M3 - Article
AN - SCOPUS:85086704821
SN - 0045-7825
VL - 369
JO - Computer Methods in Applied Mechanics and Engineering
JF - Computer Methods in Applied Mechanics and Engineering
M1 - 113169
ER -