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Publication
Estudo termomecânico do processo de FDM de PETG com Tungsténio
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Authors
Abstract(s)
A realização deste projeto tem como objetivo analisar o comportamento mecânico de
provetes construídos utilizando fabrico aditivo, nomeadamente Fused Deposition Modeling
(FDM), comparando dois materiais, PETG (Polyethylene Terephthalate Glycol) e PETG
com Tungsténio. A produção das peças é feita através de um processo de extrusão onde o
objeto é construído depositando o material camada a camada. Os materiais utilizados são os
filamentos termoplásticos puros ou misturados com metal. Estes materiais são introduzidos
numa impressora 3D que é programada com a temperatura que é necessário atingir. Assim
que a mesma atinge a temperatura ideal, o processo inicia-se. O material é depositado nos
locais determinados onde arrefece e solidifica. Este é um processo repetitivo, que exige
várias passagens até que as peças fiquem completas. Uma das vantagens deste processo é o
menor custo e também o tempo reduzido com que se consegue a obtenção de uma peça ou
modelo. Contudo, existem outras vantagens muito competitivas como a possibilidade de
gerar peças com elevado grau de complexidade geométrica, a capacidade de obter diferentes
texturas numa mesma peça bem como a capacidade da utilização de múltiplos materiais no
mesmo modelo e a baixa geração de resíduos.
Os provetes foram construídos numa única orientação, com uma trajetória de construção
designada de “aligned rectilinear”. Os ensaios realizados foram: de tração, compressão e
dureza Shore. Estes ensaios permitiram analisar as propriedades mecânicas e térmicas dos
provetes obtidos após a construção das peças em estudo. Também foram realizados ensaios
DSC. O objetivo principal deste projeto é avaliar qual a influência da adição do metal na
matriz polimérica bem como a sua utilização na indústria automóvel como substituição de
materiais utilizados.
The aim of this project is to analyse the mechanical behaviour of specimens built using additive manufacturing, namely Fused Deposition Modelling (FDM), using two materials, PETG (Polyethylene Terephthalate Glycol) and PETG with Tungsten. The parts are produced using an extrusion process where the object is built by depositing the material layer by layer. The materials used are pure thermoplastic filaments or those mixed with metal. These materials are fed into a 3D printer which is programmed with the temperature it needs to reach. As soon as it reaches the ideal temperature, the process begins. The material is deposited in the determined locations where it cools and solidifies. This is a repetitive process that requires several passes until the pieces are complete. One of the advantages of this process is the lower cost and also the reduced time it takes to obtain a part or model. However, there are other very competitive advantages such as the possibility of generating pieces with a high degree of geometric complexity, the ability to obtain different textures in the same piece as well as the ability to use multiple materials in the same model and the low generation of waste. The specimens were built in a single orientation, with a construction path known as a ‘aligned rectilinear’. The tests carried out were tensile, compression, DSC and Shore hardness. These tests made it possible to analyse the mechanical and thermal properties of the specimens obtained after the construction of the parts under study. The main aim of this project is to assess the influence of adding metal to the polymer matrix and its use in the automotive industry as a substitute for other materials.
The aim of this project is to analyse the mechanical behaviour of specimens built using additive manufacturing, namely Fused Deposition Modelling (FDM), using two materials, PETG (Polyethylene Terephthalate Glycol) and PETG with Tungsten. The parts are produced using an extrusion process where the object is built by depositing the material layer by layer. The materials used are pure thermoplastic filaments or those mixed with metal. These materials are fed into a 3D printer which is programmed with the temperature it needs to reach. As soon as it reaches the ideal temperature, the process begins. The material is deposited in the determined locations where it cools and solidifies. This is a repetitive process that requires several passes until the pieces are complete. One of the advantages of this process is the lower cost and also the reduced time it takes to obtain a part or model. However, there are other very competitive advantages such as the possibility of generating pieces with a high degree of geometric complexity, the ability to obtain different textures in the same piece as well as the ability to use multiple materials in the same model and the low generation of waste. The specimens were built in a single orientation, with a construction path known as a ‘aligned rectilinear’. The tests carried out were tensile, compression, DSC and Shore hardness. These tests made it possible to analyse the mechanical and thermal properties of the specimens obtained after the construction of the parts under study. The main aim of this project is to assess the influence of adding metal to the polymer matrix and its use in the automotive industry as a substitute for other materials.
Description
Keywords
Fabrico aditivo Ensaios mecânicos Fused deposition modeling PETG Tungsténio