5 documents found, page 1 of 1
Influence of femtosecond laser treated surfaces on the mode I fracture toughnes...
Ferreira Moreira, Raul Domingos; Oliveira, Vitor; Silva, Filipe Gonçalo Andrade Da; Vilar, R.; Moura, MarceloThe influence of laser surface treatments on mode I fracture toughness of carbon fibre reinforced composites bonded joints is addressed in this work. Five different surface treatments considering several combinations of laser fluence and scanning speeds were applied prior to bonding of the adherents, aiming to increase the adhesion and, consequently, the fracture resistance of the bonded joint. Mode I fracture ...
Mode II fracture toughness of carbon–epoxy bonded joints with femtosecond laser...
Ferreira Moreira, Raul Domingos; Oliveira, Vitor; Silva, Filipe Gonçalo Andrade Da; Vilar, R.; Moura, MarceloMode II fracture toughness of carbon–epoxy bonded joints considering laser treated surfaces was evaluated using the End-Notched Flexure (ENF) test. Four different surface preparations were performed using distinct processing conditions before bonding the specimen arms. The Resistance-curves of the fracture tests were obtained considering an equivalent crack length based procedure. The influence of the different...
Surface patterning of CRFP composites using femtosecond laser interferometry
Oliveira, Vitor; Ferreira Moreira, Raul Domingos; Moura, Marcelo; Vilar, R.We report on the surface patterning of carbon fiber-reinforced polymer (CFRP) composites using femtosecond laser interferometry. The effect of experimental processing parameters, such as the pulse energy and scanning speed, on the quality of the patterns is studied. Using the appropriate processing parameters, a selective removal of the epoxy resin can be achieved, leaving the carbon fibers exposed and textured...
Redução do risco-país em resposta ao novo Acordo da Basiléia
Moura, Marcelo; Madalozzo, ReginaSubmitted by Ludmylla Matsuura Correa null (lucorrea@stj.jus.br) on 2015-03-25T20:12:17Z No. of bitstreams: 1 reducao_risco_pais_moura.pdf: 524001 bytes, checksum: 79d19dc323ac82923edcde68ae2c7ce3 (MD5); Made available in DSpace on 2015-03-25T20:12:17Z (GMT). No. of bitstreams: 1 reducao_risco_pais_moura.pdf: 524001 bytes, checksum: 79d19dc323ac82923edcde68ae2c7ce3 (MD5) Previous issue date: 2004
The effects of government deficit on equilibrium real exchange rates and stock ...
Moura, MarceloThis paper studies the effect of government deficits on equilibrium real exchange rates and stock prices. The theoretical part modifies a two-country cash-in-advance model like used in Lucas(1982) and Sargent(1987) in order to accommodate an exchange rate market and a government that pursues fiscal and monetary policy targets. The implied result is that unanticipated shocks in government deficits raise expectat...