Built Up Edge
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Microestructural, mechanical and during turning process characterization of ABNT 1045 and ABNT 1145 steels for the evaluation of the sulfur effect. / Caracterização microestrutural, mecânica e durante o processo de torneamento de aços ABNT 1045 e ABNT 1145 para avaliação do efeito do enxofre.
O presente trabalho trata sobre a influência do teor de enxofre, em quatro aços com uma composição química similar (famílias ABNT 1045 e ABNT 1145), na microestrutura, nas propriedades estáticas, dinâmicas e nos processos de usinagem. Para esta análise foi feita uma caracterização microestrutural de cada material para determinar parâmetros tais c
Publicado em: 2008
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2. Effect of cutting speed and cutting fluid on the BUE geometry of a SAE 12L14 free machining steel
A well known phenomenon, the "built-up edge - BUE", occurs at the chip/tool interface when multiphase materials are machined at low cutting speeds. Under high compressive stresses, seizure prevents the material from sliding over the tool’s rake face. Although many reports have been published on the subject, studies of the BUE phenomenon have been marked by
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-06
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3. Theoretical and experimental analysis of cold-formed steel members under compression / Análise teórica e experimental de perfis de aço formados a frio submetidos à compressão
Cold-formed steel members present, in general, higher local slenderness than classical hot- rolled ones, which make them more prone to local buckling. Besides, thin-walled open sections have small torsional stiffness, and hence global torsional and flexural-torsional instability modes are many times more critical than global flexural ones. Also, distortional
Publicado em: 2006
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4. Heating systems of poultry facilities and their effects in the environmental thermal comfort, air quality and animal performance, in winter conditions, in the south area of the Brazil / Sistemas de aquecimento de aviários e seus efeitos no conforto térmico ambiental, qualidade do ar e performance animal, em condições de inverno, na região sul do Brasil
The broilers, in Its initial phase, are quite sensitive to the low temperatures, which can commit its development negatively, taking to enormous financial damages, especially in conditions of rigorous winters. With that, the great challenge initial in level of Brazil, in the poultry production, consists of the diagnosis of the situation of the Brazilian faci
Publicado em: 2006
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5. Influência do ângulo de posição secundário da ferramenta, raio de ponta e lubrificação na usinagem em presença de aresta postiça de corte / Influence of tool end cutting edge angle, Tool nose radius and lubrication in machining under built-up edge conditions
This work investigates the influence of tool end cutting edge angle and tool nose radius on surface finish of AISI 1045 steel machined under built-up edge conditions. Surface roughness was evaluated measuring the Ra parameter and analysis of the geometry of the machined surface was carried out in the scanning electron microscope. To assist this work, the thr
Publicado em: 2000
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6. Eficacia do metodo Meir Schneider de autocuidado em pessoas com distrofias musculares progressivas : ensaio clinico fase II
People affected by Progressive Muscular Dystrophy (PMD) live on the edge of the medical knowledge and are constantly waiting for new research results on prevention, rehabilitation and even the possible cure of those who carry the trait. The efficacy of the Meir Schneider Self-healing Method is discussed in this context, based on a phase II clinical trial wit
Publicado em: 1999
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7. OBTAINMENT, MACHINING AND WEAR OF METAL MATRIX COMPOSITES PROCESSED BY POWDER METALLURGY. / OBTENÇÃO, USINAGEM E DESGASTE DE MATERIAIS COMPÓSITOS DE MATRIZ METÁLICA PROCESSADOS VIA METALURGIA DO PÓ.
The aim of this investigation was the obtainment of metal matrix composites (MMC) by the route of powder metallurgy, and the valuation of these materials with relation to their machining and wear characteristics. Firstly, were obtained pure comercial aluminium matrix composites materials, with 5, 10 and 15% volumectric fraction of silicon carbide particles.
Publicado em: 1998
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8. Motility of ActA protein-coated microspheres driven by actin polymerization
Actin polymerization is required for the generation of motile force at the leading edge of both lamellipodia and filopodia and also at the surface of motile intracellular bacterial pathogens such as Listeria monocytogenes. Local catalysis of actin filament polymerization is accomplished in L. monocytogenes by the bacterial protein ActA. Polystyrene beads coa
The National Academy of Sciences.
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9. Three-Dimensional Organization of Higher-Plant Chloroplast Thylakoid Membranes Revealed by Electron TomographyW⃞
The light-harvesting and energy-transducing functions of the chloroplast are performed within an intricate lamellar system of membranes, called thylakoid membranes, which are differentiated into granum and stroma lamellar domains. Using dual-axis electron microscope tomography, we determined the three-dimensional organization of the chloroplast thylakoid mem
American Society of Plant Biologists.
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10. Three-dimensional structure of rat acid phosphatase.
The crystal structure of recombinant rat prostatic acid phosphatase was determined to 3 A resolution with protein crystallographic methods. The enzyme subunit is built up of two domains, an alpha/beta domain consisting of a seven-stranded mixed beta-sheet with helices on both sides of the sheet and a smaller alpha domain. Two disulfide bridges between residu