19 documents found, page 1 of 2
A Comparative Study of Different Poly (Lactic Acid) Bio-Composites Produced by ...
Al Abir, Anzum; Trindade, BrunoThe aim of this study was to fabricate different self-lubricating poly (lactic acid)-based bio-composites reinforced with mono- and multi-fillers of carbon fibers, graphene nanoparticles, and a soft Sn-based brazing alloy (Sn89-Zn8-Bi3) using a two-step process consisting of mechanical alloying followed by casting. The results showed that the incorporation of the different fillers on the PLA surface by mechanic...
Design, manufacturing, and testing of a laser textured piston ring surface rein...
Ferreira, Rita; Cunha, Ângela; Carvalho, Óscar; Trindade, Bruno; Sobral, Luís; Carvalho, Sandra; Silva, FilipeA CuCoBe–diamond composite was used to reinforce a laser textured 410 stainless steel piston ring by hot-pressing. Different hot-pressing parameters were used to optimize the sintering process of the CuCoBe particles (P = 25 and 50 MPa, T = 820 and 980 °C, and t = 15 and 30 min). The results showed an increase in the hardness of the hot-pressed samples (50.5% and 48.5% for P = 25 and 50 MPa, respectively). Thre...
Fused Filament Fabricated Poly(lactic acid) Parts Reinforced with Short Carbon ...
Al Abir, Anzum; Chakrabarti, Dipto; Trindade, BrunoThis study investigated the mechanical and tribological properties of 3D-printed Poly (lactic acid) (PLA) composites reinforced with different concentrations of carbon fibers (SCF) and graphene nanoparticles (GNP) (0.5 to 5 wt.% of each filler). The samples were produced using FFF (fused filament fabrication) 3D printing. The results showed a good dispersion of the fillers in the composites. SCF and GNP promote...
3D Multi-Material Laser Powder Bed Fusion of 420 stainless steel-Cu parts for P...
Cunha, Ângela Sofia Varela; Marques, Ana Cristina Ribeiro; Silva, Filipe Samuel; Carvalho, Óscar Samuel Novais; Bartolomeu, Flávio; Gasik, MichaelPlastic injection molding is one of the fastest-growing industries in the world. However, although it presents numerous advantages, the costs associated with the mold and machine are high and, therefore, this process is only profitable for mass production. Moreover, the reduction in the cycle time, more specifically the cooling time, has been a never-ending challenge since it has a direct influence on productio...
Livro de Resumos - II Congresso Internacional de Atividade Física
Petrica, João; Serrano, João; Faustino, António; Ramalho, André; Trindade, Bruno; Mesquita, Helena; Rocha, João; Santos, Jorge; Batista, MarcoO 2º Congresso Internacional de Atividade Física, realizado nos dias 28, 29 e 30 de setembro de 2023, em Castelo Branco, sob a organização da Escola Superior de Educação do Instituto Politécnico de Castelo Branco e da Sport, Health & Exercise Research Unit – SHERU, receberam a participação de docentes, investigadores e estudantes europeus, no domínio da atividade física e do desporto, provenientes de Portugal, ...
Influence of laser parameters on the texturing of 420 stainless steel
Cunha, Ângela Sofia Varela; Bartolomeu, Flávio; Silva, Filipe; Trindade, Bruno; Carvalho, Óscar Samuel NovaisAISI 420 martensitic stainless steel is widely used in the mould industry due to its high tensile strength, hardness, and corrosion properties. Another requirement concerning any material used for this type of application is high thermal conductivity to minimise the time between consecutive injection cycles. The surfaces of some parts of the mould may be textured and reinforced with a material with higher therm...
A importância da animação sociocultural no combate ao envelhecimento das instit...
Trindade, Bruno; Pocinho, Ricardo; Carrana, Pedro; Santos, Gisela; Serrano, JoãoObjetivo: Analisar o impacto que as atividades de animação sociocultural têm na qualidade dos serviços prestados no âmbito da terceira idade, percecionado pelos respetivos profissionais da animação sociocultural. Pretende-se verificar a importância que a profissão revela ter na qualidade das instituições e das respostas sociais no âmbito da terceira idade e do envelhecimento saudável. Metodologia: Foi realizado...
3D Multi-Material Laser Powder Bed Fusion: an innovative 420 stainless steel-Cu...
Cunha, Ângela Sofia Varela; Marques, Ana Cristina Ribeiro; Silva, Filipe Samuel; Gasik, Michael; Trindade, Bruno; Carvalho, Óscar Samuel NovaisThe plastic injection molding industry is one of the fastest-growing industries in the world since it produces a huge amount of plastic-based components of various types and sizes for the electronics, automotive, pharmaceutical, and aerospace industries [1,2]. However, although it presents numerous advantages (high dimensional and geometric precision, repeatability, and adaptability to a wide range of materials...
Novos paradigmas do envelhecimento
Pocinho, Ricardo; Margarido, Cristóvão; Duarte Santos, Rui; Marques, Liliana; Trindade, Bruno; Silva, Sílvia; Gordo, SaraEste livro que dedicamos aos mais velhos e a quem deles cuida, é uma coletânea de testemunhos, de partilh a de práticas e de manifestações de ciência. Objetiva a devolução ao idoso do direito à participação ativa e identifica formas de prestação de cuidados centrados na pessoa, garantido um envelhecimento ativo, feliz, digno e bem-sucedido. Obrigado a todos os autores, por “Não quererem apenas acrescentar anos ...
Production and optimization of 316L stainless steel dimples by laser surface te...
Cunha, Ângela Sofia Varela; Ferreira, Ana Rita Machado; Marques, Ana Cristina Ribeiro; Trindade, Bruno; Silva, Filipe SamuelSurface patterning is of increasing interest in modern manufacturing processes to achieve better results in terms of wear resistance and friction of mechanical parts and tools and, consequently, to improve their lifetime in service conditions [1]. Several approaches have been used to modify the surface properties of steel components, namely deposition of coatings, sandblasting, and texturing by electron beam, e...