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Effective mechanical behavior of sandwich beams under uncoupled bending and tor...
Silva, Hugo Miguel Andrade Lopes Figueiredo da; Meireles, José F."International Conference on Applied Mechanics and Mechanical Automation (AMMA 2014)". Serie - Applied mechanics and materials, vol. 590 ; Sandwich geometries, mainly panels and beams are widely used in several transportation industries, namely aerospace, aeronautic and automotive. Sandwich geometries are known for their advantages in structural applications: high specific stiffness, low weight, and possibilit...
Determination of material/geometry of the section most adequate for a static lo...
Silva, Hugo Miguel Andrade Lopes Figueiredo da; Meireles, José F.The acceleration of industrial machines mobile parts has been increasing over the last few years, due to the need of higher production in a short period of time. The machines were dimensioned for a lower value of acceleration, which means there is not enough rigidity for the correct operation at much higher accelerations. Nowadays, the accelerations can be near 12 times the acceleration of gravity. There is the...
Improving the dynamical behaviour of a laser cutting equipment by using a carbo...
Vieira, D. G.; Meireles, José F.; Nunes, J. P.In order to improve the dynamic behaviour of an industrial laser cutting equipment a sandwich solution, using a carbon fibre reinforced polymer (CFRP) and polyester foam core, was implemented to construct its main runway structural frame, which supports the cutting head and major laser beam mirrors and lens. Nowadays, the commercial competiveness of laser cutting equipments is considerable enhanced by their hig...
Substituting conventional steel alloys by carbon fibre composites in structural...
Vieira, D. G.; Meireles, José F.; Nunes, J. P.; Silva, Lucas F.In the present work, a finite element (FE) analysis was employed to validate the use of advanced carbon fibre composites as replacement of traditional low-alloy steel in the construction of the main runway frame structure of a laser cutting equipment currently available in the market. This new composite solution was adopted to increase the current laser equipment precision and cutting speed. The main objective ...
Improving the dynamical behaviour of a laser cutting equipment by using a carbo...
Vieira, D. G.; Meireles, José F.; Nunes, J. P.In order to improve the dynamic behaviour of an industrial laser cutting equipment a sandwich solution, using a carbon fibre reinforced polymer (CFRP) and polyester foam core, was implemented to construct its main runway structural frame, which supports the cutting head and major laser beam mirrors and lens. Nowadays, the commercial competiveness of laser cutting equipments is considerable enhanced by their hig...
Substituting conventional steel alloys by carbon fibre composites in structural...
Vieira, D. G.; Meireles, José F.; Nunes, J. P.; Silva, Lucas F.In the present work, Finite Element Analysis (FEM) was employed to validate the use of advanced carbon fibre composites as replacement of traditional low-alloy steel in the construction of the main runway frame structure of a laser cutting equipment currently available in the market. This new composite solution was adopted to increase considerably the current laser equipment precision and cutting speed. The mai...
A bending cell for small batches
Guimarães, Rui J.; Pacheco, José A.; Meireles, José F.; Fonseca, Jaime C.This article presents the study that is done for the conception of an automated bending cell devoted to the processing of parts in small batches, gathering the real necessities of potential customers. Joining the maximum of possible information, on the present cells, is has been able to conceive an automated bending cell devoted to the bending of parts, with dif-ferent form, weight, thickness, etc., in small ba...
Análise dinâmica de estruturas por modelos de elementos finitos identificados e...
Meireles, José F.Tese de Doutoramento em Engenharia Mecânica - Área de Mecânica dos Materiais ; O presente trabalho teve como objectivo principal o desenvolvimento de uma nova metodologia de melhoramento de modelos numéricos de elementos finitos aplicados à dinâmica estrutural. Nesta perspectiva foi desenvolvido um programa que, automaticamente, controla um código de elementos finitos e modifica as variáveis iniciais até ser c...
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