Weibull Analysis
Mostrando 1-12 de 95 artigos, teses e dissertações.
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1. Glass-ceramic produced with recycled glass
ABSTRACT The objective of this work is the production and characterization of glass-ceramic with recycled glass powder and 4% (w/w) of cerium dioxide. Eleven groups were defined with conformation pressure of 11.6 and 25.8 MPa, and cerium dioxide addition. The sintering temperatures of 650, 675, 700 and 750 °C were used. The raw material was formed into a mo
Matéria (Rio J.). Publicado em: 25/11/2019
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2. Estimativa da resistência característica à tração da madeira na direção paralela às fibras por meio de modelos probabilísticos
RESUMO Para um dimensionamento de estruturas de madeiras dentro das exigências de segurança, a resistência para determinada solicitação mecânica é calculada com base em seu valor característico, correspondente ao percentil de 5% de um determinado modelo de distribuição de probabilidades. A norma brasileira NBR 7190 [1] estabelece, para pequenas amo
Matéria (Rio J.). Publicado em: 25/11/2019
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3. Evaluation of the Projectile's loss of Energy in Polyester Composite Reinforced with Fique Fiber and Fabric
Firearms threat has always been a matter of personal concern, especially to soldiers in armed conflicts as well as police officers and civilians involved with public security. A multilayered armor system (MAS) is intended to personal protection against high kinetic energy ammunition, such as that used in rifles. MAS layers are normally composed of a front ce
Mat. Res.. Publicado em: 21/10/2019
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4. Aplicação da Distribuição Nakagami na Análise de Dados de Precipitação
Resumo Este trabalho teve como objetivo avaliar o desempenho da distribuição Nakagami na análise de séries de precipitação mensal, ao longo de vários anos, visando à seleção de uma distribuição útil para o planejamento e gestão de atividades dependentes dos índices de precipitação na Região Sul do Brasil. Para tanto, compara-se a mesma com
Rev. bras. meteorol.. Publicado em: 30/05/2019
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5. Fatigue Failure Analysis on Precracked 304 Stainless Steel Components Repaired by Laser with Addition of Nanocomposites
Abstract The service life of components can be extended by repairing fatigue crack with laser so as to improve resource utilization rate. However, the effect of laser repair may be influenced by the instability of laser treatment. To investigate the addition of nanocomposites on the laser repairing effect, fatigue test under uniaxial tension was carried out
Soldag. insp.. Publicado em: 16/05/2019
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6. Allometric models to estimate tree height in northern Amazonian ecotone forests
RESUMO Modelos alométricos que definem o relacionamento entre diâmetro do tronco e a altura total da árvore na bacia amazônica são importantes porque refinam as estimativas de fluxo e estoques de carbono arbóreo na região. Este estudo testou diferentes modelos alométricos para estimar a altura total de árvores a partir do diâmetro do tronco em uma
Acta Amaz.. Publicado em: 06/05/2019
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7. Dynamics of Eucalyptus Diameter Distribution in the State of Minas Gerais
ABSTRACT The aim of this study was to evaluate the effects of age, site, and density factors on the dynamics of eucalyptus diameter distribution. Data were obtained from a continuous forest inventory measured at different occasions, stratified according to the factors evaluated and adjusted by the three-parameter Weibull function using nonthinned clonal plo
Floresta Ambient.. Publicado em: 04/04/2019
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8. Weibull analysis of tensile tested piassava fibers with different diameters
ABSTRACT Environmental considerations in addition to technical, economical and societal benefits are increasingly promoting the substitution of natural fibers for glass fiber in polymer matrix composites. However, natural fibers are heterogeneous in their dimensions, specially the cross section, which plays an important role in their mechanical strength. It
Matéria (Rio J.). Publicado em: 06/12/2018
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9. Can heat-pressed feldspathic ceramic be submitted to multiple heat-pressing?
Abstract The aim of this study was to determine if multiple processing (heat-pressing) of a dental ceramic influences flexural strength, hardness, and microstructure. Ninety bar-shaped specimens (15 mm × 4 mm × 2 mm) of a pressed ceramic (Vita PM9) were fabricated and randomly divided into 6 groups (n = 15) according to the factors “number of pressings�
Braz. oral res.. Publicado em: 25/10/2018
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10. Kinetics and Thermodynamics of Thermal Inactivation of β-Galactosidase from Aspergillus oryzae
ABSTRACT For optimization of biochemical processes in food and pharmaceutical industries, the evaluation of enzyme inactivation kinetic models is necessary to allow their adequate use. Kinetic studies of thermal inactivation of β-galactosidase from Aspergillus oryzae were conducted in order to critically evaluate mathematical equations presented in the lite
Braz. arch. biol. technol.. Publicado em: 13/09/2018
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11. Genetic and Environmental Effects on Tonic Immobility Duration of Red-Winged Tinamou Applying Survival Analysis
ABSTRACT Fear behavioral studies provide knowledge on animal welfare, and fearful behaviors can be used as selection criteria of individuals adapted to intensive rearing system. The survival analysis methodology was applied to estimate tonic immobility (TI) duration, as an indicator of fear, of red-winged tinamous (Rhynchotus rufescens) reared in captivity a
Braz. J. Poult. Sci.. Publicado em: 2018-04
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12. On the creep behavior of carbon/epoxy non-crimp fabric composites
The use of composites in structural applications requires the study of specific properties to ensure that these materials are safe and an excellent option to replace some metals, for example. In the present study, vacuum assisted resin transfer molding (VARTM) was used prior to obtain carbon/epoxy non-crimp fabric composites. Dynamic mechanical analysis and
Mat. Res.. Publicado em: 26/02/2018