ESTG - Mestrado em Engenharia da Conceção e Desenvolvimento de Produto
URI permanente para esta coleção:
Navegar
Percorrer ESTG - Mestrado em Engenharia da Conceção e Desenvolvimento de Produto por assunto "3D printing"
A mostrar 1 - 4 de 4
Resultados por página
Opções de ordenação
- 3D Printed Preforms for Manufacturing Flexible Cork CompositesPublication . Palmer, Jordan Richard Gordon; Simões, Fábio Jorge PereiraAs concerns around climate and carbon footprint are better understood, countries around the world are increasingly pricing carbon. Initiatives such as the Paris Accord are a good example. As pricing carbon becomes more important, within the context of the manufacturing industry, sustainable materials are going to be well positioned to out-perform traditional non-renewables. Recycled cork has the potential to serve as a substitute to current petroleum-based foams; and a more sustainable, lower carbon footprint alternative, at the same or similar cost. This thesis will discuss the need for a new approach to the mass production of cork polymer composite materials, and the potential for additive manufacturing techniques to satisfy this need and improve their performance, while also reducing their environmental impact. The proposed solution is a process for 3D printing cork preforms for compression molded TPE based cork polymer composites. This method will provide precise software-based density control, making it possible to fabricate highly flexible, lightweight composite parts without sacrificing durability.
- 3D Printing on a Large Scale for ConstructionPublication . Gomes, Ludmila Vago; Gaspar, Florindo José Mendes; Simões, Fábio Jorge Pereira
- Additive manufacturing of foamed structuresPublication . Mistry, Abhishek; Mateus, Artur Jorge dos Santos; Simões, Fábio Jorge PereiraThe major aim of this work was to develop an additive manufacturing method for obtaining foamed structures. There is limited research to understand the properties of the materials and the technology used to make foamed parts directly by additive methods. Initially a process was developed that involved using a syringe and DLP (Digital Light Processing) to create bubbles inside the photo-polymer resin. However, the results were unappealing, so upon further literature review, inspiration was found in a research paper in which the authors used an SLA (stereolithography) printer to create foamed parts by means of a polymer resin blended with a foaming agent that caused the part to expand after printing. Additionally, this research includes a thorough investigation of the mechanical characteristics of foams with various infill structures.
- Sustainable optimization of the manufacturing of prostheses and orthoses through CAD/CAM technology for low-income communities in EcuadorPublication . Pazmiño, Diego Fernando Teran; Almeida, Henrique de Amorim; Oliveira, Célia Patrício Valente deThis dissertation addresses the challenges faced by low-income communities in Ecuador in accessing prostheses and orthoses, due to high acquisition costs and long manufacturing and delivery times. Conventional fabrication methods often require labor-intensive processes and imported materials, resulting in devices that are economically inaccessible for a large portion of the population. The main objective of this dissertation is to evaluate the technical and economic feasibility of producing customized prostheses and orthoses through CAD/CAM technologies and additive manufacturing, using recyclable and low-cost polymeric materials. The proposed approach integrates 3D body scanning, digital modeling, mesh optimization, and parametric design tools to create patient-specific devices with reduced production time and material waste. The methodology includes the use of structured-light 3D scanning to capture anatomical data, mesh processing using MeshLab, solid modeling and customization in Autodesk Fusion 360, and the exploration of lightweight parametric structures. In addition, a cost simulation based on realistic economic parameters from Ecuador is performed to estimate unit production costs and potential selling prices. The results demonstrate that the proposed digital workflow can significantly reduce manufacturing time and costs when compared to traditional methods, while maintaining functional and ergonomic requirements. This dissertation highlights the potential of additive manufacturing as a sustainable and socially impactful solution to improve healthcare accessibility and promote circular economy principles in low-resource contexts