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The Relationship Between Lattice Structure Topology and Rapid Investment Casting Performance


The Relationship Between Lattice Structure Topology and Rapid Investment Casting Performance

Richard, Christopher (2019) The Relationship Between Lattice Structure Topology and Rapid Investment Casting Performance. Masters thesis, Concordia University.

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To leverage the unprecedented design freedom of additive manufacturing (AM), this work aims to develop a design methodology for lattice structures fabricated by rapid investment casting (RIC). What lattice topological properties have the most significant impact on the overall performance in RIC, and how to improve them? The hypothesis is that the relative strut size, number of joints, joint valence, and strut angle significantly affect the performance. There is no overarching analysis of the effect that lattice topology has on casting performance. To remedy this, various lattice topologies underwent mold flow simulation, finite element analysis, casting experiments, and grain structure analysis. From the results, a set of design guidelines for RIC is created, and new lattice structures are designed. The design recommendations by importance are as follows. A relative strut size, number of joints, and joint valence should be below 0.20, 9, and 8, respectively. For mechanical performance, the strut angle distribution should include vertical, diagonal, and horizontal struts. The two proposed topologies: proposed cell and hourglass, meet all these criteria and achieve good casting and mechanical performance.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Mechanical, Industrial and Aerospace Engineering
Item Type:Thesis (Masters)
Authors:Richard, Christopher
Institution:Concordia University
Degree Name:M.A. Sc.
Program:Mechanical Engineering
Date:16 September 2019
Thesis Supervisor(s):Kwok, Tsz-Ho
Keywords:Rapid Investment Casting, Lattice Structures, Lattice Topology, Design Guidelines
ID Code:988456
Deposited On:27 Oct 2022 13:52
Last Modified:27 Oct 2022 13:52


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