| 1. |
- Dordlofva, Christo
(författare)
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Qualification Aspects in Design for Additive Manufacturing : A Study in the Space Industry
- 2020
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The aim of this research is to further the understanding of implications for product development and qualification when introducing additive manufacturing (AM) in the context of the space industry. Increased availability of AM machines and alluring potentials such as design freedom and cost-efficient product development and manufacturing has led to a rapid growth in the use of AM. However, the implementation of AM is hampered by lack of process understanding, implying uncertainties for engineers on how to design products for AM. Furthermore, the AM process chain (including e.g. post-processes) is not sufficiently developed and understood, adding further uncertainties. These uncertainties are a challenge when developing products for space applications, especially if they are critical for mission success and hence not allowed to fail. Such products and their manufacturing processes have to comply with strict requirements on verifying performance, quality, and reliability, i.e. product and process qualification. The purpose of this research is to investigate how qualification is addressed during product development in the space industry in order to find improved ways for engineers to explore the capabilities of AM to better understand its possibilities and limitations. The research is specifically focused on the use of powder bed fusion processes by companies developing and manufacturing sub-system components for space applications. It is limited to the manufacturing of components on Earth for use in space. The research approach is qualitative. Five studies provide the empirical foundation for the thesis, in which a total of four companies are included. In particular, one of the companies is studied in-depth, including a development project for a critical AM product. Individual interviews, workshops and focus groups are used for data collection. Furthermore, the in-depth study is based on a longitudinal presence at the company, providing the opportunity to gather data from project meetings and discussions. Collaborative action research with three of the companies provides a research setting to study the development of three AM products (of which the in-depth study is one) and how uncertainties related to the AM process can be addressed. Four aspects of how to address product qualification in Design for AM are deduced: (i) AM knowledge should be built through application-driven development processes, (ii) qualification should be accounted for early and to a larger extent, (iii) suitable and acceptable requirements should be defined through collaboration, and (iv) rapid manufacturing should be utilised to evaluate critical uncertainties. To support engineering teams on how to address these aspects, this thesis presents two contributions to the design field. The first is a design process utilising AM Design Artefacts (AMDAs) to identify, test and evaluate the AM-related uncertainties that are most pressing for a product. Through the iterative use of AMDAs, products designs are successively evolved, enabling a design which meets process capabilities and fulfils product requirements. The AMDA design process is part of the second contribution, a Design for Qualification framework that encourages a qualification-driven development approach for AM products. The framework includes six design tactics that provide guidance for its implementation. The tactics encourage an application-driven development process where qualification is considered early, and where successive steps are taken towards a thorough AM process chain understanding. The framework is designed based on the studied cases, and future research should focus on developing the framework and tactics further to facilitate implementation and wider applicability.
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| 2. |
- Isaksson, Ola, 1969, et al.
(författare)
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Perspectives on innovation: The role of engineering design
- 2019
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Ingår i: Proceedings of the International Conference on Engineering Design, ICED. - : Cambridge University Press (CUP). - 2220-4334 .- 2220-4342. ; 2019-August, s. 1235-1244
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Konferensbidrag (refereegranskat)abstract
- The aim of the paper is to foster a discussion in the engineering design community about its understanding of the innovation phenomena and the unique contribution that comes from engineering design. The paper reports on the dialouge originating from a series of workshops with participants from different backgrounds in engineering design, systems engineering, industrial design psychology and business. Definitions of innovation are revisited as used in business, management and engineering design contexts. The role of innovation is then discussed related to product development from (i) the management perspective, (ii) a systems architecture perspective and (iii) in relation to sustainable development as one driver of innovation. It is argued that engineering design has a central role in how to realise the novelty aspect of innovation and often plays a critical role in maturing these into the valuable products, and there is a need to articulate the role of engineering design in innovation to better resonate with the business and management research.
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| 3. |
- Al Handawi, Khalil, et al.
(författare)
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Optimal allocation of design margins in additive remanufacturing
- 2021
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Ingår i: Proceedings of the ASME Design Engineering Technical Conference. ; 3B-2021
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Konferensbidrag (refereegranskat)abstract
- Often, coping with changing requirements results in substantial overdesign, because of the ways in which design margins are allocated at the beginning of the design process. In this paper, we present a design optimization method for minimizing overdesign using additive manufacturing. We use recently defined constituents of design margins (buffer and excess) as metrics in a design optimization problem to minimize overdesign. The method can be used to obtain optimal design decisions for changing requirements. We demonstrate our method by means of a turbine rear structure design problem where changes in the temperature loads are met by depositing different types of stiffeners on the outer casing. The optimal decisions obtained by optimization minimize overdesign but ensure that requirements are met throughout the product's lifecycle.
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| 4. |
- Alonso Fernandez, Iñigo, 1985, et al.
(författare)
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Designing Multi-Technological Resilient Objects in Product Platforms
- 2022
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Ingår i: Proceedings of NordDesign 2022: How Product and Manufacturing Design Enable Sustainable Companies and Societies.
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Konferensbidrag (refereegranskat)abstract
- Uncertainty about the market, environment, and technological landscape of the future challenges the ways companies utilize the notion of “product platforms” to gain efficiency during development and production. This paper reviews design approaches to cope with uncertainties and highlights the benefit of designing a platform to enable “resilience” to deal with uncertain situation without the need to change the structure or configuration of the product platform. To achieve resilience, the paper proposes to introduce “resilient objects” in regions of the product platform that are likely to be most affected by change. Resilient design objects are already common in practice, such as a spring-damper system in mechanical systems. However, since product platform are multi-technological, this paper proposes a way of representing generic resilient objects (along five different design domains) for multi-technological systems. This proposal is supported by illustrative examples. Future research opportunities are identified around extending the matrix of generic multi-technological resilient objects, and defining a systematic method to design, select and evaluate which resilient objects are more valuable to be inserted in specific regions of the product platform.
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| 5. |
- Alonso Fernandez, Iñigo, 1985, et al.
(författare)
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Identification of Technology Integration Challenges at Two Global Automotive OEMs
- 2020
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Ingår i: Proceedings of the Design Society: DESIGN Conference. - : Cambridge University Press (CUP). - 2633-7762. ; 1, s. 2245-2254
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Konferensbidrag (refereegranskat)abstract
- Platform design has been firmly established in the automotive industry as a strategy to provide wider product variety while maintaining cost effective production. But this strategy can struggle to keep up with the pace and nature of emerging technologies. This paper reviews the existing approaches to modelling product platforms, and showcases the challenges at OEMs introducing new technological innovations in their platforms. A gap is identified in the methods to assess the ability of existing platforms to integrate new technologies whenever they become available.
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| 6. |
- Alonso Fernandez, Iñigo, 1985, et al.
(författare)
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Reconciling Platform vs. Product Optimisation by Value-Based Margins on Solutions and Parameters
- 2024
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Ingår i: Journal of Engineering Design. - 1466-1837 .- 0954-4828. ; In Press
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Tidskriftsartikel (refereegranskat)abstract
- Engineering companies face the challenge of optimising margins within product platforms while balancing individual product optimisation and maximising platform commonality. Key obstacles include organizational silos, diverse design variables, design space allocation, and varying time perspectives. This paper proposes a value-based modelling methodology that integrates both internal and external variety within the manufacturer. Using an automotive Head-Up Display (HUD) case study, we demonstrate how to effectively utilise platform margins to maximise technological variety and minimise internal variety, thereby enhancing long-term system value. This approach helps design teams understand the implications of their decisions, optimise platform margins to meet evolving technological demands, reduce costs, and maximise value. Our findings advance the understanding of margin optimisation in product platforms and support informed decision-making for engineering companies facing conflicting objectives
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| 7. |
- Andersson, Petter, et al.
(författare)
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A case study of how knowledge based engineering tools support experience re-use
- 2011
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Ingår i: Research into Design. - Bangalore, India : Research Publishing Services. - 9789810877217
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Konferensbidrag (refereegranskat)abstract
- A manufacturing company’s unique intellectual capital is to a large extent built on experience from its own product development and manufacturing processes. Thus, methods and tools to utilize and benefit from this experience in an efficient way have an impact on a company’s ability to stay competitive and advance on the global market. Knowledge Based Engineering (KBE) is an engineering methodology to capture engineering knowledge systematically into the design system. Hence, KBE tools are considered to support experience re-use and improve engineering activities. This paper presents the results from a study where the objective was to investigate the support for experience re-use in KBE applications in an aerospace company. A proposed framework is presented to analyze the capturing and use of experience in a company’s processes identifying gaps and propose improvements. The study revealed weaknesses in the process steps for experience feedback which can be used to improve KBE applications further.
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| 8. |
- Andersson, Petter, et al.
(författare)
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A process improvement approach to capitalize on manufacturing experience in engineering design
- 2009
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Ingår i: Design has never been this cool. - Gkasgow : Design Research Society. ; , s. 287-298
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Konferensbidrag (refereegranskat)abstract
- The ability to capitalize on company knowledge and experience earned in various projects is recognized as key assets in the competition on the growing global market. Methods and tools are constantly evolving, still there is a frustration over repeated design flaws and design engineers has a difficult task to find and use manufacturing experience from earlier projects. This paper outlines a process improvement approach where the engineering process is described andanalysed to find bottlenecks. Examples from other engineering processes are presented along with a prototype of a knowledge application to resolve identified issues with the manufacturing feedback process.Experience and knowledge are closely related, hence a knowledge life cycle explain the different stepswith a "capturing" and "deploying" side.The feedback processes for manufacturing experience is analysed where search & find together with contextualisation of experience data are recognised as key mechanisms. A knowledge application is presented that presents experience data from different repositories in a way that is logic for the receiver. This reduces the lead-time and increase the quality of the feedback process.
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| 9. |
- Andersson, Petter, et al.
(författare)
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Automated CFD blade design within a CAD system
- 2006
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Ingår i: Integration of numerical simulation into the product development process (FEA and CFD). - Grafing : NAFEMS Contact Nordic Countries.
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Konferensbidrag (refereegranskat)
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| 10. |
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