Material Non Linearity
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Physical and geometric non-linear analysis using the finite difference method for one-dimensional consolidation problem
Abstract This article presents a numerical model based on the finite difference method for the physical and geometric non-linear analysis of a one-dimensional consolidation problem regarding a saturated, homogeneous and isotropic soil layer with low permeability and high compressibility. The problem is formulated by adopting the void ratio as the primary var
REM, Int. Eng. J.. Publicado em: 2019-06
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2. Development and validation of alternative methods by non-aqueous acid-base titration and derivative ultraviolet spectrophotometry for quantification of sildenafil in raw material and tablets
Sildenafil citrate (SILC) is a potent phosphodiesterase-5 inhibitor used for erectile dysfunction and pulmonary hypertension. This study shows two simple, fast and alternative analytical methods for SILC determination by non-aqueous titration and by derivative ultraviolet spectrophotometry (DUS) in active pharmaceutical ingredient and/or dosage forms. The qu
Braz. J. Pharm. Sci.. Publicado em: 20/04/2017
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3. On the Validation of a Numerical Model for the Analysis of Soil-Structure Interaction Problems
Abstract Modeling and simulation of mechanical response of structures, relies on the use of computational models. Therefore, verification and validation procedures are the primary means of assessing accuracy, confidence and credibility in modeling. This paper is concerned with the validation of a three dimensional numerical model based on the finite element
Lat. Am. j. solids struct.. Publicado em: 2016-08
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4. Structural analyses of reinforced tubular T-joints
Abstract The use of rolled hollow sections has been substantially boosted mainly due to the advantages associated with structural behavior and aesthetics, leading to an intense use in Europe, Southeast Asia, North America, Australia, and now, in Brazil due to the wider supply of these profiles. Therefore, it is important to investigate the structural behavio
Rem: Rev. Esc. Minas. Publicado em: 2016-03
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5. Non-Enzymatic Amperometric Determination of Glucose by CuO Nanobelt Graphene Composite Modified Glassy Carbon Electrode
We have successfully developed for the first time an electrochemical sensor for glucose by using a simple and effective design of growing CuO nanobelts graphene composites (CuO@G). The as prepared composites were characterized by X-ray diffraction studies (XRD), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM)
J. Braz. Chem. Soc.. Publicado em: 2015-08
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6. Resistência de um solo não saturado a partir de ensaios com teor de umidade constante (CW) / Shear strength of an unsaturated soil from constant water content tests
In many parts of the world, geotechnical engineers frequently deal with unsaturated soils, and the performance of constructions on such soils depends on their mechanical characteristics, and among them, the shear strength. The unsaturated soil shear strength can be experimentally determined by using techniques which allow soil suction control or measurement
Publicado em: 2010
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7. Sistema Computacional para Análise Avançada Estática e Dinâmica de Estruturas Metálicas
A new computational tool for the advanced static and dynamic analysis of steel framed structures based on the Finite Element Method has been developed and is presented herein. Understanding the static and dynamic behavior of a structure is essential for designing structures that are lighter and slenderer without affecting their safety and quality standards.
Publicado em: 2009
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8. Desenvolvimento de métodos analíticos para quantificação de artemeter e lumefantrina em comprimidos de dose fixa combinada e em plasma humano.
Nowadays, malaria is the worlds most incident parasitic infection. The artemisinin based combination therapy (ACT) has been advocated as a promising treatment for malaria and artemetherlumefantrine (20+120 mg) is the main recommended association in endemic areas. In spite of the wide use of this association, the scientific literature is still scarce regardin
Publicado em: 2009
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9. Estudo de nós soldados tipo K de treliças planas constituídas por seções tubulares circulares de aço
The trusses of circular hollow sections, should be checked about last limit states of plastification and punching shear of chord wall. The standards AWS D1.1: 2002, ANSI /IACS 360-05 and EN 1993-1-8:2005 have virtually identical procedures for the verification of these limits states, based mainly in the works of Wardenier et al. (1991) and Packer and Henders
Publicado em: 2008
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10. Estereoselective analysis of cis-tramadol hydrocloride and its impurities in raw material and pharmaceutical formulation / Análise estereosseletiva do cloridrato de cis-tramadol e de suas impurezas em matéria-prima e formulação farmacêutica
Tramadol hydrochloride is a centrally acting analgesic with two chiral centers; the cis isomer is the active drug and the trans isomer is a process impurity. Both enantiomers of cis-tramadol hydrochloride contribute to the analgesic effect through different, but complementary and interactive pharmacological mechanisms. Although both isomers of cis-tramadol h
Publicado em: 2008
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11. Analise numerica não-linear de estruturas de concreto armado considerando o fenomeno da aderencia entre o aço e o concreto / Non-linear numerical analysis of reinforced concrete structures considering the bond phenomena between the steel and the concrete
In this work aspects of the properties of the concrete, steel and the interaction between them, with particular interest in the deterioration of the bond that occurs in the steel-concrete interface that are necessary to the numerical analysis of reinforced concrete structures are studied. The main aim of this research is the development of a numerical model
Publicado em: 2007
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12. Non-linear numerical analysis of reinforced concrete structures considering the bond phenomena between the steel and the concrete / Analise numerica não-linear de estruturas de concreto armado considerando o fenomeno da aderencia entre o aço e o concreto
Neste trabalho são estudados os aspectos das propriedades do concreto, das propriedades do aço e das interações entre eles, com particular interesse na deterioração da aderência que ocorre na interface aço-concreto, para a análise numérica de estruturas de concreto armado. O objetivo principal é o desenvolvimento de uma modelagem numérica capaz d
Publicado em: 2007