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Design for Additive Manufacturing: An Optimization driven design approach
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
2020 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Design för additiv tillverkning : En optimieringsdriven designmetod (Swedish)
Abstract [en]

Increasing application of Additive Manufacturing (AM) in industrial production demands product reimagination (assemblies, subsystems) from an AM standpoint. Simulation driven design tools play an important part in achieving this with design optimization subject to the capabilities of AM technologies. Therefore, the bus frames department (RBRF) in Scania CV AB, Södertälje wanted to examine the synergies between topology optimization and Design for AM (DfAM) in the context of this thesis.

In this thesis, a methodology is developed to establish a DfAM framework involving topology optimization and is accompanied by a manufacturability analysis stage. A case study implementation of this developed methodology is performed for validation and further development. The case study replaces an existing load bearing cross member with a new structure optimized with respect to weight and manufacturing process.

It resulted in a nearly self supporting AM friendly design with improved stiffness along with a 9.5% weight reduction, thereby proving the benefit of incorporating topology optimization and AM design fundamentals during the early design phase.

Abstract [sv]

Ökad användning av Additive Manufacturing (AM) i industriell produktion kräver ett nytänkade av produkter (enheter, delsystem) ur AM-synvinkel. Simuleringsdrivna designverktyg spelar en viktig roll för att nå detta med designoptimering med hänsyn taget till AM-teknikens möjligheter. Därför ville bussramavdelningen (RBRF) på Scania CV AB, Södertälje undersöka synergierna mellan topologioptimering och Design för AM (DfAM) i detta examensarbete.

I examensarbetet utvecklas en metodik för att skapa en DfAM-ramverk som involverar topologioptimering och åtföljs av ett tillverkningsanalyssteg. En fallstudieimplementering av denna utvecklade metodik utförs för validering och fortsatt utveckling. Fallstudien ersätter en befintlig lastbärande tvärbalk med en ny struktur optimerad med avseende på vikt och tillverkningsprocess. Det resulterade i en nästan självbärande AM-vänlig design med förbättrad styvhet tillsammans med en viktminskning på 9,5 %, vilket visar fördelen med att integrera topologioptimering och grundläggande AM-design tidigt i designfasen.

Place, publisher, year, edition, pages
2020. , p. 99
Series
TRITA-ITM-EX ; 2020:482
Keywords [en]
Additive Manufacturing, Design for Additive Manufacturing, Overhang Constraint, Topology Optimization
Keywords [sv]
Additiv tillverkning, Design för Additiv tillverkning, överhängsbegränsning, Topologioptimering
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-281246OAI: oai:DiVA.org:kth-281246DiVA, id: diva2:1467851
External cooperation
Scania CV AB
Supervisors
Examiners
Available from: 2020-09-16 Created: 2020-09-16 Last updated: 2022-06-25Bibliographically approved

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CiteExportLink to record
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