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Cradle-to-gate life cycle assessment: a comparison of polymer and metal-based p...
Anwar, Talha; Lopes, Ana Carina Ferreira; Silva, Eva C.; Mould, Sacha Trevelyan; Sampaio, Álvaro M.; Pontes, A. J.Diferent industries are adopting additive manufacturing (AM) technologies to produce complex designs with minimum material wastage. The sustainability assessment of AM technologies is therefore essential to address the current environmental challenges. This research aims to compare the environmental impacts of diferent raw materials used for the production of a robot end-efector with internal conformal channels...
Influence of layer thickness on dimensional and geometrical properties of alumi...
Silva, Eva C.; Lopes, Ana Carina Ferreira; Sampaio, Álvaro M.; Pontes, A. J.To ensure dimensional repeatability of additively manufactured parts, it is crucial to evaluate their dimensional and geometrical properties and to determine the capabilities of these systems to produce certain features. In this sense, the purpose of this research is to understand the influence of the layer thickness on the dimensional and geometrical accuracy of parts produced by powder bed fusion–laser beam. ...
Development and characterization of composite materials with multi-walled carbo...
Lopes, Ana Carina Ferreira; Sampaio, Álvaro M.; Pontes, A. J.Purpose: With the technological progress, high-performance materials are emerging in the market of additive manufacturing to comply with the advanced requirements demanded for technical applications. In selective laser sintering (SLS), innovative powder materials integrating conductive reinforcements are attracting much interest within academic and industrial communities as promising alternatives to common engi...
Methodology for parameters optimization and development of new materials for ad...
Lopes, Ana Carina FerreiraThe continuous technological progress of Selective Laser Sintering (SLS) is essential for the successful manufacturing of leading-edge products demanded by the industrial society. This includes critical optimization of the SLS process parameters through a comprehensive understanding of the process-structure-property relationship and the development of multi-functional materials for non-conventional applications...
Study and evaluation of different combinations of virgin and processed PA mater...
Lopes, Ana Carina FerreiraSelective Laser Sintering (SLS) has proved to be an excellent process for prototyping functional parts of engineering thermoplastics such as Polyamide 12. However, due to the processing conditions, mainly the high temperatures involved in the building chamber, the material undergoes physical and chemical changes which affects the performance of the powder and preclude its full reuse for the next process. So, it...