About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Applications
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Presentation Title |
Finite Element Modelling of Defects In Additively Manufactured Strut-based Lattice Structures |
Author(s) |
Ifeanyi Echeta, Ben Dutton, Richard K Leach, Samanta Piano |
On-Site Speaker (Planned) |
Ifeanyi Echeta |
Abstract Scope |
Additively manufactured strut-based lattice structures produced by powder bed fusion are prone to characteristic manufacturing defects. There remains a need for the development of a general finite element (FE) modelling framework that can include a range of defects into any strut-based lattice design. Such a framework would prove valuable for performing parametric studies of a given lattice structure to determine its sensitivity to specific defects. This paper presents a modelling framework for implementing a range of both form and surface defects into FE meshes of strut-based lattices. Intuitive mathematical definitions are provided for each of the manufacturing defects - a signed distance function forms the foundation for this framework, upon which surface meshes can be modified and converted into tetrahedral meshes. FE parametric studies are performed on lattice structures with different unit cell designs. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |