Examensarbeten på grundnivå

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https://odr.chalmers.se/handle/20.500.12380/40

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Utveckling av staket med integrerad solcellsteknik
(2024) El Masri, Mohammed Ali; Forsman, Niklas; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Boldizar , Antal; Hansson, Mattias
This study aims to develop an embodied concept for a fence with integrated solar cell technology, specifically designed for gardens and urban environments. The project, commissioned by Raymond Solar AB, focuses on creating a scalable and sustainable product that meets both current and future demands within solar energy, while being tailored to the Nordic climate and compatible with Raymond Solar’s existing products. The central challenge is designing a fence that is cost-effective to manufacture and easy to assemble, while ensuring that it withstands the climatic challenges, has a low environmental impact, and is both functional and aesthetically pleasing. A particular challenge was to make the fence adjustable to allow for some tolerance in the positioning and inclination of the ground screws, which is crucial for ensuring a smooth and rapid installation. Additionally, the construction needed to be compatible with different types and sizes of solar panels to maximize flexibility. The project was conducted through a combination of literature reviews, competitor analyses, and computer-assisted testing. Traditional technologies and competitor solutions were thoroughly examined to gather relevant data. Functional analyses and specifications were established to ensure that the product meets all necessary functions and requirements. CAD software was used for design, while strength analyses were conducted using FEA software. The study resulted in a modular fence construction made of aluminum, with posts, bottom rails, panels, footings, and fittings. The design is easy to assemble with few screws and includes T-slots for flexible installation of solar panels. Additionally, the fence is ergonomic and time-saving during installation, and the design allows for adjustments to handle deviations in the placement and inclination of ground screws. The construction is also compatible with various types and dimensions of solar panels, increasing flexibility and enabling adaptation to different installation needs. The production offers the possibility of using recycled materials, and the fence is fully recyclable, significantly reducing its environmental impact. The study concludes that the developed fence with integrated solar cell technology meets the criteria for sustainability, cost-effectiveness, and ease of assembly. The robust construction ensures that the fence can withstand the challenges of the Nordic climate and offers a solution that is both environmentally friendly and practical for consumers and installers
Utveckling av Slitagetålighetstest för Plastdetaljer
(2024) Dalal, Ali; Honauer, Ludwig; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Boldizar, Antal; Boldizar, Antal
The purpose of the project was to investigate, plan, and, as far as possible, implement a method for evaluating the abrasion resistance of plastic in collaboration with the company FlexLink. Currently, FlexLink uses a method for evaluating abrasion resistance that takes 500–2000 hours to yield results. Our goal was to reduce this time to only 24–72 hours. Specific material choices were not included in the project as the focus was on developing a preliminary method for the materials currently in use. The project began with information gathering and study visits to RISE in Mölndal and Borås for detailed knowledge acquisition on the subject. Subsequently, a selection of methods was made to determine the method with the best potential to meet the objective. The chosen method was the “Pin on Ring” method. This is a modified version of “Pin on Disc,” which is currently used by FlexLink and RISE for material testing. Since the method is based on the existing method, several concept development stages were needed to produce a final product. Finally, CAD models and a rig construction were created to visualize the method. However, implementation could not be completed due to the lack of several critical components needed to build the equipment and thus validate and compare it with the existing method.
Materialval i VA-system baserat på miljöoch klimataspekter samt anläggning-, driftoch underhållskostnader
(2024) Carlsson, John; Vainio, Axel; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Persson, Christer
This thesis was commissioned by Växjö Kommun and aims to investigate the three sustainability dimensions in relation to different materials and their role in the water and sewage industry. Växjö Kommun seeks more data to support their material selection decisions in projects, as current decisions are sometimes based on personal opinions. The materials explored include PE and ductile iron in pressure pipelines, PP, PVC, and concrete in gravity pipelines, and PP and concrete in two types of wells. The ecological sustainability dimension has been analyzed through quantitative calculations based on EPD studies and LCA conducted for the various products, as well as discussions on environmental perspectives with municipalities. Since not all aspects are included in the product environmental declarations, the analysis only covers the production stage, with values for the materials also sourced from Granta EduPack. The economic sustainability dimension has been investigated by analyzing damage history and consulting with knowledgeable individuals from Gothenburg, Kalmar and Växjö who work with damage frequency, damage history, and costs related to these damages. The social sustainability dimension has been examined through interviews with individuals from three different municipalities, focusing primarily on differences in working conditions when using different materials. The results show that there are ecological differences between materials but that it should be further explored as only a small part of the entire life cycle has been able to be analyzed for all products, EPD-studies were also missing for certain well-components and other products that would have been relevant to compare. The interviews reveal that some municipalities currently do not consider environmental aspects when selecting materials for piping. From an economic perspective, more resources are required to accurately determine all cost differences throughout the products' life cycles. Regarding working conditions and other social aspects, there should be no significant differences if the work is carried out correctly, even though the work processes may vary depending on the material chosen.
Spacer on Bracket Mounting Solution
(2024) Czerniak, Kacper; Hall, Jonathan; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Almefelt, Lars; Gustafsson, Göran; Lundh, Jonas
The following document is a report on a bachelor’s degree project in Mechanical Engineering, which was carried out in the spring of 2022. The work was conducted under the Department of Industrial and Materials Science at the Chalmers University of Technology. The assignment, which is to develop a mounting solution for spacers and other attachments on brackets, was assigned by Volvo Penta. The reason to develop an alternative mounting solution was to solve some quality issues which were consequences of the existing solution. To establish a concept for the mounting solution a product development method was used. This included idea generation based on a requirements list using brainstorming and TRIZ, and a market analysis looking at solutions to similar problems. Elimination matrices and prototype testing were used to successively reduce the number of solutions. The resulting concepts are presented, and conclusions are drawn
Strategies for Robust Fabrication using RD&T
(2024) Jönsson, Anna; Lanqvist, Anton; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Wärmefjord, Kristina; Lööf, Johan
The aerospace industry requires precision in manufacturing to ensure high-quality, reliable components. This thesis investigates strategies for robust fabrication at GKN Aerospace, focusing on optimizing welding joint preparation methods. Specifically, it compares one-sided and three-sided machining strategies to minimize geometric variations and deformations during welding. GKN Aerospace, a leading supplier of aerospace components, faces challenges in maintaining tight tolerances and reducing weight in complex assemblies. Virtual geometry assurance using RD&T simulation software is crucial in early development phases. This study evaluates geometric variations and fixture stability to aid decision-making for welding joint preparations. A comprehensive literature review on geometrical variation, robust design principles, and RD&T applications in manufacturing sets the foundation. Simulations and analyses, including variation simulations and Finite Element Analysis (FEA), predict non-rigid parts behavior during assembly and welding, providing insights into optimal fixture design. Interviews with production, design, and tool design engineers at GKN Aerospace reveal diverse perspectives. Production engineers prioritize efficiency and cost-effectiveness, often favoring one-sided machining. Design engineers emphasize precision and adaptability, advocating detailed simulations. Tool design engineers focus on creating versatile fixtures for various machining strategies. The study identifies key factors influencing welding joint preparation: material properties, component geometry, and production efficiency. One-sided machining is less costly and simpler but may lead to higher quality control and rework expenses. Three-sided machining, while more complex and expensive, offers superior precision and stability. Case studies demonstrate RD&T simulations practical application in evaluating fixture designs and predicting clamping forces. Results indicate that simulations with physical prototypes, or digital twins, provide more reliable data than purely theoretical models. This study recommends a structured decision-making framework for welding joint preparation in aerospace manufacturing, combining RD&T simulations with engineers’ practical expertise. The thesis concludes with directions for further research, including integrating welding simulations and exploring virtual fixturing techniques to enhance aerospace components' precision and reliability.

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