Influence Diagrams
Mostrando 1-12 de 44 artigos, teses e dissertações.
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1. Vibration behavior of thin-walled steel members subjected to uniform bending
Abstract This article reports the results of an investigation on the effects of internal moments on the vibration behavior of thin-walled steel members. The analyses are based on the Generalized Beam Theory (GBT), a thin-walled bar theory accounting for cross-section in-plane deformations - its main distinctive feature is the representation of the member def
REM, Int. Eng. J.. Publicado em: 2018-07
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2. Modeling and Analysis of a LOX/Ethanol Liquid Rocket Engine
ABSTRACT This work studies the performance and dry mass of the under development LOX/Ethanol L75 liquid rocket engine. To this end, an object-oriented program written in C++ was developed. The program is intended to be versatile and easily extensible in order to analyze different configurations of liquid rocket engines. The UML (Unified Modeling Language) to
J. Aerosp. Technol. Manag.. Publicado em: 14/06/2018
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3. Characterization of Impact Toughness Properties of DIN39MnCrB6-2 Steel Grade
Boron added steels in quenched and tempered condition have been widely used in applications where good mechanical properties and low cost are required. In this study, impact resistance of DIN 39MnCrB6-2 steel grade was investigated due to its criticality in automotive components. Metastable phase diagrams were built to guide heat treatments. The influence he
Mat. Res.. Publicado em: 04/12/2017
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4. MgO Saturation Analisys of CaO-SiO2-FeO-MgO-Al2O3 Slag System
Electric arc furnace (EAF) slag has a range of functions, including improving energy efficiency through the "slag foaming" phenomenon. As such, the study of slag is important in EAFs. One of the factors that determine foaming quality and efficiency is the presence of solid particles. MgO saturation is highly significant since, in addition to ensuring the pre
Mat. Res.. Publicado em: 30/11/2017
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5. Campbell Diagrams of a Spinning Composite Shaft with Curvilinear Fibers
Abstract This paper presents the vibratory behavior of a spinning composite shaft with curvilinear fibers on rigid bearings in the case of free vibrations. A p-version of finite element is used to define the model. A theoretical study allows the establishment of the kinetic energy and the strain energy of the shaft, necessary to the result of the equations o
Lat. Am. j. solids struct.. Publicado em: 2017-03
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6. Influence of the Yield Surface Curvature on the Forming Limit Diagrams Predicted by Crystal Plasticity Theory
Abstract The aim of this paper is to investigate the impact of the microscopic yield surface (i.e., at the single crystal scale) on the forming limit diagrams (FLDs) of face centred cubic (FCC) materials. To predict these FLDs, the bifurcation approach is used within the framework of rate-independent crystal plasticity theory. For this purpose, two micromech
Lat. Am. j. solids struct.. Publicado em: 2016-12
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7. Effect of EDTA on quartz and hematite flotation with starch/amine in an aqueous solution containing Mn2+ ions
Abstract In this paper, a detailed study of the influence of Mn2+ ions on quartz and hematite flotation (at pH 10.5 with starch/amine as depressor/collector) in the absence and presence of ethylenediaminetetraacetic acid (EDTA) is presented. By using zeta potential measurement and a careful analysis of manganese species present in water for dosages in which
REM, Int. Eng. J.. Publicado em: 2016-12
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8. Optimization of self-nanoemulsifying formulations for weakly basic lipophilic drugs: role of acidification and experimental design
ABSTRACT Formulators face great challenges in adopting systematic approaches for designing self-nanoemulsifying formulations (SNEFs) for different drug categories. In this study, we aimed to build-up an advanced SNEF development framework for weakly basic lipophilic drugs, such as cinnarizine (CN). First, the influence of formulation acidification on CN solu
Braz. J. Pharm. Sci.. Publicado em: 2016-12
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9. Non-linear dynamics of a hanging rope
Two-dimensional motion of a hanging rope is considered. A multibody system with elastic-dissipative joints is used for modelling of the rope. The mathematical model based on the Lagrange formalism is presented. Results of some numerical simulations are shown for the mechanical system with kinematic excitation. Basic tools are used to qualify dynamics of the
Lat. Am. j. solids struct.. Publicado em: 2013-01
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10. Avaliação da contaminação de córregos de Cerrado por metais pesados utilizando-se larvas de Odonata como bioindicadores / Assessment of heavy metal contamination in Brazilian savannas streams using Odonata larvae as bioindicators
The aquatic ecosystems are the main receptors of pollutants and contaminants from industrial and agricultural activities and of the discharge of sewage. Among the various substances potentially harmful, heavy metals are a threat to the aquatic ecosystems and the biota. This research aimed to evaluate the contamination of Cerrados streams by heavy metals usin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
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11. Formação de professores para os anos iniciais : uma experiência com o ensino de ciências
The education of teachers for science teaching has received widespread criticism, particularly on the distance between the training and approaches what is expected of future teachers. In the case of training for the early years of elementary school, it raises other issues, such as little or no training in science content and teaching methods. Because of this
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2011
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12. Grain size effect on the electrical response of SnO2 thin and thick film gas sensors
Porous nano and micro crystalline tin oxide films were deposited by RF Magnetron Sputtering and doctor blade techniques, respectively. Electrical resistance and impedance spectroscopy measurements, as a function of temperature and atmosphere, were performed in order to determine the influence of the microstructure and working conditions over the electrical r
Materials Research. Publicado em: 2009-03