23 documents found, page 1 of 3
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...
Human-centered design approach to the development of a graphical user-interface...
Alexandre, Rosana; Lima, Pedro; Silva, Rosa Mariana; Mould, Sacha Trevelyan; Colim, Ana S.The inspection process of aircraft parts is a specially demanding activity due to its strict standards and could be quite stressful for inspectors. To optimize the inspection process, support and digitize the visual inspection and improve working conditions, a portable device was developed. The present study addresses the development of a graphical user-interface (GUI) for this device. It was used need-finding ...
Smart carbon fiber-reinforced polymer composites for damage sensing and on-line...
Lopes, Cláudia Jesus Ribeiro; Araújo, Andreia; Silva, Fernando; Pappas, Panagiotis-Nektarios; Termine, Stefania; Trompeta, Aikaterini-Flora A.High electrical conductivity, along with high piezoresistive sensitivity and stretchability, are crucial for designing and developing nanocomposite strain sensors for damage sensing and on-line structural health monitoring of smart carbon fiber-reinforced polymer (CFRP) composites. In this study, the influence of the geometric features and loadings of carbon-based nanomaterials, including reduced graphene oxide...
Real-time precision in 3D concrete printing: controlling layer morphology via m...
Silva, João M.; Wagner, Gabriel Mar Pinto; Silva, Rafael; Morais, António Francisco Nogueira; Ribeiro, João Paulo Silva; Mould, Sacha Trevelyan3D concrete printing (3DCP) requires precise adjustments to parameters to ensure accurate and high-quality prints. However, despite technological advancements, manual intervention still plays a prominent role in this process, leading to errors and inconsistencies in the final printed part. To address this issue, machine learning vision models have been developed and utilized to analyze captured images and video...
A Machine Learning and computer-vision framework for real-time control in 3DCP:...
Silva, João Miguel Carvalho Lopes; Macedo, Rafael; Morais, António Francisco Nogueira; Ribeiro, João Paulo Silva; Mould, Sacha Trevelyan3D Concrete Printing (3DCP) is a fast-paced process that requires multiple parameters to be accurately tuned in order to guarantee a high-quality print. Despite the technological advances in 3DCP, the control of this process still requires frequent manual intervention, which can lead to error, inconsistency under different executions and the reliance on human expertise to accommodate changes in the characterist...
Towards the digital transformation of inspection tasks in aircraft manufacturin...
Colim, Ana S.; Alexandre, Rosana; Cardoso, André; Pereira, Débora; Lima, Pedro; Silva, Mariana; Mould, Sacha TrevelyanIn aircraft manufacturing, the inspection workers are often exposed to risk factors (e.g. straining postures). Knowing the lack of ergonomics studies focused on this context, this chapter presents an ergonomic assessment conducted during the design phase of a new device to be used by the inspectors of metallic parts of airplanes. This device will consist of a portable artificial vision system intended to captur...
On the development of an ergonomic approach for the design of an industrial rob...
Colim, Ana S.; Cardoso, André; Bicho, Estela; Louro, Luís; Alves, Carla; Ribeiro, Pedro; Pereira, Débora; Monteiro, Sérgio; Costa, NélsonAs industries push for continuous technological innovation to boost their competitiveness, the need to balance techno-economical goals with emerging societal needs is now more pressing than ever. Inspired by the novel paradigm of Industry 5.0, we aim to place human physical and cognitive needs at the center of the production process, introducing proactive and human-aware robots capable of collaboration as co-wo...
Designing a user-centered inspection device’s handle for the aircraft manufactu...
Colim, Ana S.; Pereira, Débora; Lima, Pedro; Cardoso, André; Almeida, Rui; Fernandes, Duarte; Mould, Sacha Trevelyan; Arezes, P.In aircraft manufacturing settings, workers are frequently exposed to biomechanical risk factors, mainly in the later stages of the production processes, including inspection tasks. To support the development of a novel inspection device appropriate for the end-users and their tasks, this study presents a user-centered approach for the device’s handle. Three different handles were proposed, and the current stud...
Experimental assessment of a numerical modelling code developed for the profile...
Fernandes, C.; Rajkumar, Ananth; Habla, F.; Mould, Sacha Trevelyan; Sacramento, A.; Carneiro, O. S.; Nóbrega, J. M.One of the critical stages in the extrusion of thermoplastic profiles is the cooling of the profile, which is usually undertaken in a metallic calibrator. In order to assure the highest possible productivity, the profile thermal energy must be removed as fast as possible. However, due to the typical low diffusivity of thermoplastic materials, the cooling stage is relatively long and the temperature gradients al...
Profile extrusion: experimental assessment of a numerical code to model the tem...
Rajkumar, Ananth; Habla, F.; Fernandes, C.; Mould, Sacha Trevelyan; Sacramento, A.; Carneiro, O. S.; Nóbrega, J. M.Designing an industrial calibration system that ensures fast and uniform cooling of a complex extruded profile is always a difficult task. Numerical tools are a valuable aid for the design of these systems in order to achieve fast, low-cost, and effective solutions. This work comprises the experimental validation of a numerical code, previously developed to support the design of profile extrusion calibration sy...