Poisson S Ratio
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Validation of a simplified computer simulation method for plastic forming of metals by conventional tensile tests
Abstract This work was developed in order to validate a simplified computer simulation method for application in the drawing processes. The results of tensile tests on AISI 1004, AISI 1020 steel and copper were compared to those of computer simulations performed using the Deform-3D TM software. Each specimen was assumed to be an elasto-plastic material and w
REM, Int. Eng. J.. Publicado em: 2017-12
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2. Factors associated with recurrence of alcohol-related traffic violations in southern Brazil
Objective: To analyze variables associated with recurrence of blood alcohol content (BAC)-related traffic violations among drivers in southern Brazil. Method: This cross-sectional study included 12,204 driving-under-the-influence (DUI) offenders according to data provided by the Rio Grande do Sul state Transportation Department. Sociodemographic character
Rev. Bras. Psiquiatr.. Publicado em: 24/03/2014
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3. Mechanical properties of nanocomposite laminated structure and its sensibility to modal analysis procedure
In this work, tensile and shear modulus, as well as Poisson's ratio of a woven orthotropic nanocomposite plate were determined from vibration data. Plates used in the experiment were 16 layers S2-glass/epoxy composite manufactured by vacuum assisted wet layup. The nanocomposite plate was obtained by adding 0%, 1%, 2%, 5% and 10% nanoclays in weight to the ep
Lat. Am. j. solids struct.. Publicado em: 2014-03
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4. Nonprescribed use of tranquilizers and use of other drugs among Brazilian students
Objectives: To describe patterns of nonprescribed use of tranquilizers by students aged 10 to 18 years and assess the sociodemographic characteristics of these adolescents and their use of other substances. Methods: A randomized and stratified sample of 47,979 students from state and private schools of the 27 Brazilian state capitals completed a self-report
Rev. Bras. Psiquiatr.. Publicado em: 2014-03
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5. Estudo de parâmetros constitutivos extraídos de dados experimentais no comportamento de misturas asfálticas
É apresentado um estudo sobre a influência da escolha dos parâmetros constitutivos no comportamento de misturas asfálticas, estudando o comportamento do material tanto no regime linear como o regime não-linear de deformações. Foram utilizados os dados experimentais da dissertação de Brito (2006), no qual realizou ensaios de compressão diametral med
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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6. Child malnutrition in the municipal district of Jordão, Acre State, Brazilian Amazonia / Desnutrição infantil em Jordão, Estado do Acre, Amazônia Ocidental Brasileira
Despite the improvements in child nutrition in developing countries over recent decades, child malnutrition remains a serious public health issue in Brazil, particularly within Amazonia. Nutritional surveys on Amazonian populations are scarce and generally involve indigenous populations settled in reserves. Aim - To ascertain the prevalence and factors assoc
Publicado em: 2010
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7. Mechanical properties and porosity of dental glass-ceramics hot-pressed at different temperatures
The objective of this work was to evaluate biaxial-flexural-strength (σf), Vickers hardness (HV), fracture toughness (K Ic), Young's modulus (E), Poisson's ratio (ν) and porosity (P) of two commercial glass-ceramics, Empress (E1) and Empress 2 (E2), as a function of the hot-pressing temperature. Ten disks were hot-pressed at 1065, 1070, 1075 and 1080 °C f
Materials Research. Publicado em: 2008-09
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8. Why are the rates of cesarean section in Brazil higher in more developed cities than in less developed ones?
The objective of the present study was to investigate factors associated with cesarean sections in two cities located in different regions of Brazil and to determine factors that explain the higher cesarean section rate in the more developed city, Ribeirão Preto, compared to the less developed one, São Luís. Data from two cohort studies comprising 2846 wo
Brazilian Journal of Medical and Biological Research. Publicado em: 11/06/2007
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9. Razão de Poisson da crosta superior da região de Porangatu, Goiás, Província Tocantins: um estudo por refração sísmica
This work presents a refined seismic model of compressional waves (Vp) showing the distribution of Poisson ratio along the upper crust of central Tocantins Province, central Brazil, based on two dimensional modelling of the Porangatu seismic refraction data. The Porangatu seismic line begins in the Araguaia Belt (FXA) and continues through the western portio
Publicado em: 2006
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10. X-ray scattering from self-assembled InAs islands
In this work several structural and chemical properties of self-assembled InAs islands grown on GaAs(001) are studied using surface x-ray scattering with synchrotron radiation. The technique of x-ray diffraction under grazing incidence condition was employed to differentiate coherent and incoherent islands. We used a model of a strained pyramidal island to i
Brazilian Journal of Physics. Publicado em: 2004-06
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11. Estudo das propriedades termomecanicas e estruturais de filmes finos amorfos de carbono e nitretos de carbono / Study of the thermomechanical and structural properties in amorphous carbon and carbon nitride
In this work, we studied thenno mechanical and structural properties of hydrogenated amorphous carbon (a-C: H), hydrogenated carbon nitride (a-C:H:Nx) and carbon nitride (a-C:Nx) thin films. Two techniques were used to prepare the samples: glow discharge for depositing hydrogenated amorphous carbon (a-C:H) and carbon nitride (a-C:H:Nx) and ion beam assisting
Publicado em: 2004
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12. Modelagem semi-analitica pseudo tridimensional de propagação e fechamento de fraturas induzidas em rochas
This investigation describes a semi-analytical model which simulates fracture propagation in petroleum reservoir rocks. The model permits evaluating the three fracture dimensions parameters (width, height and length) during propagation. Like other pseudo 3D models, some assumptions are used to solve the fracture three-dimensional propagation problem, such as
Publicado em: 1998