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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Sustainable Product Development Through Integrated Life Cycle Assessment and Computer Aided Design : An Exploratory Study of Life Cycle Assessment (LCA) / Hållbar produktutveckling genom integrerad livscykelanalys och datorstödd design : Utforskande studie om livscykelanalys (LCA)

Åhlström, Vilma January 2023 (has links)
The purpose of this paper was to investigate the integration between Life Cycle Assessment (LCA) and Computer-Aided Design (CAD). The project has been carried out as a degree project at Karlstad University in the spring of 2023 on behalf of the company TECHNIA. The project was a master's thesis of 22.5 higher education credits for the higher education engineering program in Innovation Technology and Design. The project has been structured to achieve the purpose and goals of the assignment. The work consisted of investigating the capacity and user-friendliness of an integrated LCA and CAD system by using literature as support and investigating and analysing the system and performing case studies. To achieve the purpose and goal, Dassault Systèmes 3DEXPERIENCE has been used as support. The issue of sustainability today has great weight, and companies increasingly choose sustainable solutions, which is partly due to pressure from external stakeholders. This project highlights the most important trends in sustainability. It is an attractive factor on the market which is relevant for all types of industries. Surveys have also been carried out to map facts about the LCA and CAD integration. Through theoretical investigations, a comprehensive understanding of the integration between LCA and CAD as well as its importance for sustainable development has been highlighted. The case studies carried out were conducted as interviews at two companies, EDAG and Mölnlycke Health Care, where the interviews were crucial in creating an approach to the use of an integrated system. Use of the integrated system then contributed to a deeper understanding of the functions. By combining the methods used, the project was able to meet its goals. The methods generated results describing advantages, disadvantages, practices, tools, and approaches when using integrated LCA and CAD. The conclusion is that an integration between LCA and CAD has many advantages compared to a traditional LCA tool. An integrated system is more efficient and easier to use. / Uppsatsens ändamål var att undersöka integrationen mellan livscykelanalys (LCA) och datorstödd design (CAD). Projektet har genomförts som ett examensarbete vid Karlstads Universitet under våren 2023 på uppdrag av företaget TECHNIA. Projektet som genomfördes var en kandidatuppsats om 22,5 högskolepoäng för programmet högskoleingenjörsprogrammet i Innovationsteknik och Design. Projektet har varit uppbyggt för att uppnå syftet samt målen för uppdraget. Kortfattat gick arbetet ut på att undersöka kapaciteten och användarvänligheten med ett integrerat LCA och CAD system genom att använda litteratur som stöd, undersöka och analysera systemet samt att utföra fallstudier. För att uppnå syftet och målet har Dassault Systèmes 3DEXPERIENCE användes som stöd. Hållbarhetsfrågan i dagens samhälle har stor vikt och företag väljer alltmer hållbara lösningar, som delvis beror på press från externa intressenter. Projektet belyser de viktigaste trenderna inom hållbarhet och att det är en attraktiv faktor på marknaden som är relevant för alla typer av industrier. Undersökningar har också genomförts för att kartlägga fakta om LCA och CAD integrationen. Genom teoretiska undersökningar har omfattande förståelse av integrationen mellan LCA och CAD samt dess betydelse för hållbar utveckling belysts i examensarbetet. Fallstudierna som utfördes gjordes som intervjuer på två företag, EDAG och Mölnlycke Health Care, där intervjuerna var avgörande för att skapa ett tillvägagångssätt för användning av systemet. Användning av det integrerade systemet bidrog sedan till en djupare förståelse för funktionerna. Genom att kombinera de använda metoderna kunde projektet uppfylla sina mål. Metoderna genererade resultat som beskriver fördelar, nackdelar, praxis, verktyg samt tillvägagångssätt vid användning av integrerad LCA och CAD. Slutsatsen är att ett integration mellan LCA och CAD har många fördelar i jämförelse med ett traditionellt LCA-verktyg. Ett integrerat system är mer effektivt och enklare att använda.
2

Design Automation of Air Intake Lips on an Aircraft : How to implement design automation for air intake lips in a later design concept phase

Blixt, Wilma, Schönning, Hilda January 2023 (has links)
Air intakes are complex components that are critical for the propulsion of the aircraft. The design has to consider requirements from several different departments, often contradictory. Additionally, the air intakes need to cooperate with other critical components. This makes testing of the models crucial, hence time-demanding. Design automation is a growing field which aims at minimizing repetitive work during product concept development. To follow the increasing digitalization, further investigations of design automation applied on air intakes are significant.  The application Imagine and Shape in 3D Experience CATIA handles subdivided surfaces. These surfaces are both flexible and provide a high order of continuity, which is often desired. While design automation in CATIA is well investigated, design automation in Imagine and Shape is not.  Knowledge based engineering techniques are often used to implement design automation. The methodology MOKA is frequently used when developing knowledge based engineering applications. This master thesis has followed MOKA in combination with Scrum.  The master thesis has resulted in a method to allow automation in Imagine and Shape by linking mesh nodes on subdivided surfaces to reference points that are parameterized. Further, a method for generating air intake configurations as well as the integration with a fuselage has been developed. The method includes wireframe models in Generative Shape Design, subdivided surfaces in Imagine and Shape, scripts in EKL as well as UserForm and scripts in VBA. Additionally, the order of continuity for an integration between air intakes and fuselage has been analyzed using tools in 3D Experience CATIA.  A conclusion drawn is that the method for generating air intakes cannot be completely automated. Instantiation and dimension of components can be automated, but manual work is required when using tools in Imagine and Shape during the integration between the components and the fuselage.Two methods for linking mesh nodes to reference points have been identified, one manual and one semi-automatic. The automatic method saves time and mouse clicks by utilizing VBA scripts. Further, the achieved order of continuity of an integration between subdivided surfaces depends on the individual components.

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