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Browsing by Issue Date, starting with "2023-06-19"

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  • O ensino através da arte e a arte através do ensino
    Publication . Costa, Gonçalo André Flórido da; Rosa, Armando Nascimento; Wengorovius, Rita
    Esta dissertação é o reflexo de um método de trabalho aplicado a uma turma do Curso de Artes do Espectáculo Interpretação, ao longo do seu Secundário (10º/11º/12º). Vamos poder acompanhar o desenvolvimento dos alunos na área artística e o seu envolvimento com o mundo do trabalho, comunidade educativa e comunidade local. Por outro lado, serão especificados os modelos de inspiração, bem como a experiência pedagógica/artística acumulada que levou à influência/criação deste método de ensino.
    2023-06-19Master thesis Open access Show more
  • Simulation of the cyclic stress-strain behavior of the magnesium alloy AZ31B-F under multiaxial loading
    Publication . Anes, Vitor; Moreira, Rogério; Reis, Luís; Freitas, Manuel
    Under strain control tests and cyclic loading, extruded magnesium alloys exhibit a special mechanism of plastic deformation ("twinning" and "de-twining"). As a result, magnesium alloys exhibit an asymmetric material behavior that cannot be fully characterized with the typical numerical tools used for steels or aluminum alloys. In this sense, a new phenomenological model, called hypo-strain, has been developed to correctly predict the cyclic stress-strain evolution of magnesium alloys. On this basis, this work aims to accurately describe the local cyclic elastic-plastic behavior of AZ31B-F magnesium alloy under multiaxial cyclic loading with Abaqus incremental plasticity. The phenomenological hypo-strain model was implemented in the UMAT subroutine of Abaqus/Standard to be used as a design tool for mechanical design. To evaluate this phenomenological approach, the results were correlated with the uniaxial and multiaxial proportional and non-proportional experimental tests. In addition, the estimates were also correlated with the Armstrong-Frederick nonlinear kinematic hardening model. The results show a good correlation between the experiments and the phenomenological hypo strain approach. The model and its implementation were validated in the strain range studied.
    2023-06-19Research article Open access Show more