Computational Methodology for Optimal Design of Additive Layer Manufactured Turbine Bracket

Conference paper


Levatti, HU, Innocente, MS, Morgan, HD, Cherry, J, Lavery, NP, Mehmood, S, Cameron, I and Sienz, J (2014). Computational Methodology for Optimal Design of Additive Layer Manufactured Turbine Bracket. First International Conference on Sustainable Design and Manufacturing (SDM-14). Swansea, UK 28 - 30 Apr 2014 KES International.
AuthorsLevatti, HU, Innocente, MS, Morgan, HD, Cherry, J, Lavery, NP, Mehmood, S, Cameron, I and Sienz, J
TypeConference paper
Abstract

The design of critical components for aircrafts, cars or any other kind of machinery today is typically subject to two conflicting objectives, namely the maximisation of strength and the minimisation of weight. The conflicting nature of these two objectives makes it impossible to obtain a design that is optimal for both. The most common approach aiming for a single objective optimisation problem in aerospace is to maintain the weight minimisation as the objective, whilst setting strength requirements as constraints to be satisfied. However, manufacturing methods incorporate additional restrictions for an optimal design to be considered feasible, even when satisfying all constraints in the formulation of the optimisation problem. In this context, Additive Layer Manufacturing adds remarkably higher flexibility to the manufacturability of shape designs when compared with traditional processes. It is fair to note, however, that there are still some restrictions such as the infeasibility of building unsupported layers forming angles smaller than 45 degrees with respect to the underlying one. Nowadays, it is common practice to use a set of software tools to deal with these kinds of problems, namely Computer Aided Design (CAD), Finite Element Analysis (FEA), and optimisation packages. The adequate use of these tools results in an increase in efficiency and quality of the final product. In this paper, a case study was undertaken consisting of a turbine bracket from a General Electric challenge. A computational methodology is used, which consists of a topology optimisation considering an isotropic material at first instance, followed by the manual refinement of the resulting shape taking into account the manufacturability requirements. To this end, we used SolidWorks®2013 for the CAD, Ansys Workbench®14.0 for the FEA, and HyperWorks®11 for the topology optimisation. A future methodology will incorporate the automation of the shape optimisation stage, and perhaps the inclusion of the manufacturability restriction within the optimisation formulation.

KeywordsManufacturing; ALM; Computational Methodology
Year2014
PublisherKES International
Accepted author manuscript
License
File Access Level
Open
Publication dates
Print30 Apr 2014
Publication process dates
Deposited27 Mar 2017
Accepted15 Dec 2013
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https://openresearch.lsbu.ac.uk/item/87837

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2014 SDM14-037 Levatti, HU et al .pdf
License: CC BY 4.0
File access level: Open

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