5 documents found, page 1 of 1
Manifestação da Perturbação de Hiperatividade/Défice de Atenção em crianças ent...
Martins, A.; Medeiros, B.; Moreira, D.; Amorim, F.; Oliveira, I.; Soares, J.; Lopes, M.; Leal, R.; Castro, T.; Fernandes, S. M.; Santos, SusanaPóster apresentado na 2.ª Edição da Semana da Sustentabilidade, na Universidade Portucalense Infante D. Henrique.
DMLS technology for automotive tooling
Leal, R.; Barreiros, Fatima; Alves, M.L.; Romeiro, F.; Vasco, J.; Santos, M.; Marto, C.The automotive industry is challenged every day, with companies competing and developing new models and facelifts in short term, requiring new tools or tool reshaping. Concerning the current world economic scenario, decreasing time-for-tooling becomes as important as decreasing time-to-market. Such scenario opens up the horizons for new manufacturing approaches like additive manufacturing. In this case-study, a...
Modeling and numerical study of actuator and sensor effects for a laminated pie...
Costa, L.; Figueiredo, I.; Leal, R.; Oliveira, P.; Stadler, G.The aim of this paper is to derive a reduced model for a piezoelectric plate and to study its actuator and sensor capabilities. In the first part, we focus on the asymptotic modeling for thin plates formed by stacking layers of different piezoelectric materials. In the asymptotic model, the mechanical and electric unknowns are shown to be partly decoupled. In the second part, we study the actuator and sensor ca...
Smart capabilities of a laminated piezoelectric plate model
Costa, I.; Figueiredo, I.; Leal, R.; Oliveira, P.; Stadler, G.This paper focuses on the modelling and analysis of actuator and sensor effects for thin laminated plates, which are formed by stacking several layers of different piezoelectric materials. We first discuss features and properties of a two-dimensional asymptotic model for a piezoelectric anisotropic plate, whose unknowns are the Kirchhoff-Love displacement and the electric potential. We prove that the latter is ...
Multiple- and single-objective approaches to laminate optimization with genetic...
Costa, L.; Fernandes, L.; Figueiredo, I.; Júdice, J.; Leal, R.; Oliveira, P.In this paper an application of a genetic algorithm to a material- and sizing-optimization problem of a plate is described. This approach has obvious advantages: it does not require any derivative information and it does not impose any restriction, in terms of convexity, on the solution space. The plate optimization problem is firstly formulated as a constrained mixed-integer programming problem with a single o...