Incremental Loading
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Workability studies on Al+2.5%TiO2+Gr powder metallurgy composites during cold upsetting
Al+2.5%TiO2+Gr composites were synthesized through powder metallurgy technique and their workability behavior has been studied under tri-axial stress state condition. The powders were compacted using suitable punch and die in 400 kN hydraulic press and sintered at a temperature of about 590 ºC for a period of 3 hours in an electric muffle furnace. The sinte
Mat. Res.. Publicado em: 2014-12
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2. The effect of acute magnesium loading on the maximal exercise performance of stable chronic obstructive pulmonary disease patients
OBJECTIVE: The potential influence of magnesium on exercise performance is a subject of increasing interest. Magnesium has been shown to have bronchodilatatory properties in asthma and chronic obstructive pulmonary disease patients. The aim of this study was to investigate the effects of acute magnesium IV loading on the aerobic exercise performance of stabl
Clinics. Publicado em: 2012
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3. Constitutive model for bimodular elastic damage of concrete
An elastic damage model for concrete has been proposed considering damage-induced bimodularity. A scalar damage parameter has been chosen to quantify the damage. Expressions for the material compliance tensor components have been derived from the assumed strain and complementary energy functions stated in terms of the principal stresses and strains. Incremen
Latin American Journal of Solids and Structures. Publicado em: 2010
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4. Projeto de um sistema fotovoltaico autônomo de suprimento de energia usando técnica MPPT e controle digital
This work presents the design and development of a battery charger aiming at applications in autonomous photovoltaic systems of low energy consumption, using a Buck type converter with digital control for the loading process based on a digital signal processor TMS320F2812 from Texas Instruments. In order help dimensioning the converter components the photovo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/08/2009
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5. Sintered eutectoid P/M steel behaviour during cold upsetting
Cold upsetting experiments were carried out on sintered Fe-0.8%C steel preforms in order to evaluate the technical relationship that exist between the applied stresses against continuous deformation and densification. Powder preforms of 86% theoretical density and 0.40 of initial aspect ratio were subjected to incremental compressive loading of 0.04 MN under
Materials Research. Publicado em: 2008-03
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6. Uma proposta de carregamento incremental de fluxos veiculares para a estimação de matriz O-D sintética / A proposal for incremental loading in traffic flows for synthetic O-D matrix estimation
Neste trabalho é proposto um método de carregamento incremental dos fluxos veiculares para a estimação de matriz O-D sintética. A principal motivação para o desenvolvimento deste trabalho está na complexidade dos métodos de estimação de matriz sintética pelo método iterativo, que tem conduzido a resultados não satisfatórios. O método de carre
Publicado em: 2007
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7. Desenvolvimento de programa livre para análise de pórticos tridimensionais considerando-se a não linearidade geométrica, fissuração do concreto e ligações semi-rígidas
Structural analysis of framed structures using discrete method, wherein, splitting them into elements with simplified considerations, can bring not satisfactory results or end up using very high safety coefficient to the structure. With the growth of computing and microcomputers it is feasible the resolution of structures considering all parts, therefore thr
Publicado em: 2007
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8. Analise de estruturas metalicas reticuladas planas considerando a não-linearidade fisica em sistemas não-conservativos
In this work, analyses of steel plane framed structures, consisting of deformable frames by bending, shear and axial load are presented. In these analyses the effect of material nonlinearity in nonconservative systems are considered. According to the theory of small displacements, a computational program was developed to make possible the determination of th
Publicado em: 2002
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9. VentilaÃÃo pulmonar regional durante o teste de resistÃncia dos mÃsculos inspiratÃrios
Incremental threshold loading (ITL) has been proposed as a test of inspiratory muscle endurance. The aim of this study was to analyze regional pulmonary ventilation and electric activity of the respiratory muscles during the test of inspiratory muscles endurance. Ten female volunteerswere studied. Radioaerosol was generated by a jet nebulizer, containing 99m
Publicado em: 2002
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10. OTIMIZAÇÃO DE FORMA DE MODELOS BIDIMENSIONAIS DE ELEMENTOS FINITOS COM COMPORTAMENTO ELASTO-PLÁSTICO / OPTIMIZACIÓN DE FORMA DE MODELOS BIDIMENSIONALES DE ELEMENTOS FINITOS CON COMPORTAMIENTO ELÁSTICO-PLÁSTICO / SHAPE OPTIMIZATION OF 2D FINITE ELEMENT MODELS CONSIDERING ELASTO-PLASTIC BEHAVIOUR
The main goal of this work is to present an integrated system for the optimization of plane structures with elastoplastic behavior. The methodology proposes an alternative for the conservative way in which structures traditionally have been optimized, i.e., that they present linear elastic behavior. The computational system is said to be integrated because i
Publicado em: 2000
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11. EFEITO DA TEMPERATURA EM SOLOS / TEMPERATURE EFFECTS ON SOILS
The subject matter of this thesis is the study of the mechanical behavior of clay and residual soils subjected to a series of tests with temperatures ranging from 20 to 70ºC. The experimental program consisted of Atterberg limits, consolidation tests with incremental loading (SIC), triaxial consolidated undrained tests (CIU) and direct shear tests on both s
Publicado em: 1998
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12. NON LINEAR ANALYSIS OF EXCAVATIONS AND EMBANKMENTS / ANÁLISE NÃO LINEAR DE ESCAVAÇÕES E ATERROS
The main objective of this thesis consists on the development and application of a computational program, ANLOG (Non Linear Analysis of Geotechnical Constructions), to analyse geotechnical problems coupling flow and deformation, and considering constitutive non-linear relations for the soil modelling.At the global level, the solution of the non linear system
Publicado em: 1998