Process selection charts based on economy and environment: subtractive or additive manufacturing to produce structural c
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ORIGINAL PAPER
Process selection charts based on economy and environment: subtractive or additive manufacturing to produce structural components of aircraft C. Hodonou1 · O. Kerbrat1,2 · M. Balazinski1 · M. Brochu1 Received: 2 July 2020 / Accepted: 23 July 2020 © Springer-Verlag France SAS, part of Springer Nature 2020
Abstract Multi-criteria decision-making methods are commonly used to rank manufacturing processes based on weighted economic and environmental criteria. The weighting process can be challenging, especially at early design stages where costs and environmental data are not precisely defined. In addition, for weights resulting in equivalent alternatives, no conclusion can be drawn when costs and environmental impact data are scarce and heterogeneous. Therefore, new methodology and tools are needed to find trade-offs between economy and environment in selecting manufacturing processes. In this work, a new systematic methodology for manufacturing process selection using fuzzy logic is developed. Applied to neutral, environmentalist and economist modes of thinking, manufacturing process selection charts were generated for all cost and environmental impact values. These tools were used to compare machining and selective laser melting for the production of aluminum structural components of aircraft. Results show that selective laser melting is the best trade-off in the mindset of neutrals and environmentalists, while machining is preferred by economists. Moreover, the proposed methodology can be used in situations where costs and environmental impacts are defined as ranges rather than determined numerical values. This methodology ranks manufacturing processes when weighted-criteria methodologies are limited. Keywords Multi-criteria decision-making · Fuzzy logic · Production costs · Environmental impacts · Machining · Powder bed fusion
1 Literature review Criteria used for manufacturing process selection can be classified into five categories: economical, environmental, mechanical, technical and social. In a recent study, Hodonou et al. [1] proposed an integrated material-design-process selection methodology in
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C. Hodonou [email protected] O. Kerbrat [email protected] M. Balazinski [email protected] M. Brochu [email protected]
1
Aluminium Research Centre—REGAL, Polytechnique Montréal, Montreal, Canada
2
CNRS GeM, UMR 6183, University of Rennes, Rennes, France
which components are designed for a targeted materialprocess combination. The authors demonstrated that in order to choose material, design and process between equivalent alternatives for aircraft structural components, mechanical and technical criteria must be used as objectives instead of selection criteria. Once the objectives are met, manufacturing process alternatives can be ranked based on economic, environmental and social criteria exclusively. Works on manufacturing process selection using economic and environmental criteria are reviewed in the following, as social criteria are not in the scope of th
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