Contact Problem
Mostrando 13-24 de 168 artigos, teses e dissertações.
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13. Danger in the streets: exposures to bloodborne pathogens after community sharp injuries in Rio de Janeiro, Brazil
ABSTRACT Objective: Exposures to sharps injuries occurring in the community are relatively frequent. We describe characteristics of community sharp exposures reported in the city of Rio de Janeiro from 1997 to 2010. Methods: A cross-sectional analysis of exposure reports to sharps in the community reported to a surveillance system, designed for health care
Braz J Infect Dis. Publicado em: 2017-06
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14. Stress State at the Vertex of a Composite Wedge, One Side of Which Slides Without Friction Along a Rigid Surface
Abstract For studying the stress-strain state at singular points and their neighborhoods new concept is proposed. A singular point is identified with an elementary volume that has a characteristic size of the real body representative volume. This makes it possible to set and study the restrictions at that point. It is shown that problems with singular points
Lat. Am. j. solids struct.. Publicado em: 2017
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15. Continuous Modeling Technique of Fiber Pullout from a Cement Matrix with Different Interface Mechanical Properties Using Finite Element Program
Abstract Fiber-matrix interface performance has a great influence on the mechanical properties of fiber reinforced composite. This influence is mainly presented during fiber pullout from the matrix. As fiber pullout process consists of fiber debonding stage and pullout stage which involve complex contact problem, numerical modeling is a best way to investiga
Lat. Am. j. solids struct.. Publicado em: 2016-10
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16. Analysis of Continuous and Discontinuous Cases of a Contact Problem Using Analytical Method and FEM
Abstract In this paper, continuous and discontinuous cases of a contact problem for two elastic layers supported by a Winkler foundation are analyzed using both analytical method and finite element method. In the analyses, it is assumed that all surfaces are frictionless, and only compressive normal tractions can be transmitted through the contact areas. Mor
Lat. Am. j. solids struct.. Publicado em: 2015-09
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17. Parametric Model Method and Deployment Simulation of Inflatable Antenna Structures
ABSTRACT: In this paper, we develop a parametric model method and simulate the deployment mechanism of inflatable antenna structures. Different folded methods are developed for the primary members of inflatable antenna structures, which include inflatable tubes, an inflatable torus, a reflector etc. The unstressed configuration and the folded configuration o
J. Aerosp. Technol. Manag.. Publicado em: 2015-06
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18. Integrated control of Chagas disease for its elimination as public health problem - A Review
Chagas disease or American trypanosomiasis is, together with geohelminths, the neglected disease that causes more loss of years of healthy life due to disability in Latin America. Chagas disease, as determined by the factors and determinants, shows that different contexts require different actions, preventing new cases or reducing the burden of disease. Cont
Mem. Inst. Oswaldo Cruz. Publicado em: 2015-05
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19. Nonlinear Equilibrium and Stability Analysis of Axially Loaded Piles Under Bilateral Contact Constraints
AbstractThis paper presents a nonlinear stability analysis of piles under bilateral contact constraints imposed by a geological medium (soil or rock). To solve this contact problem, the paper proposes a general numerical methodology, based on the finite element method (FEM). In this context, a geometrically nonlinear beam-column element is used to model the
Lat. Am. j. solids struct.. Publicado em: 2015-04
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20. Biodegradation evaluation of bacterial cellulose, vegetable cellulose and poly (3-hydroxybutyrate) in soil
In recent years, the inappropriate disposal of polymeric materials has increased due to industrial development and increase of population consumption. This problem may be minimized by using biodegradable polymers, such as bacterial cellulose and poly(hydroxybutyrate), from renewable resources. This work was aimed at monitoring and evaluating degradation of b
Polímeros. Publicado em: 2015-04
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21. Numerical investigation of sliding frictional contact in functionally graded steels (FGS)
This study will analyze the two-dimensional nonlinear partial slip contact problem between a graded half plane in the normal to the contact interface and a rigid flat punch subject to a normal load. The problem, formulated under plane strain conditions, is reduced to singular integral equations of the second kind that are then solved with an expansion - coll
Mat. Res.. Publicado em: 2014-12
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22. Leprosy: review of the epidemiological, clinical, and etiopathogenic aspects - Part 1
Leprosy is caused by Mycobacterium leprae and has been known since biblical times. It is still endemic in many regions of the world and a public health problem in Brazil. The prevalence rate in 2011 reached 1.54 cases per 10,000 inhabitants in Brazil. The mechanism of transmission of leprosy consists of prolonged close contact between susceptible and genetic
An. Bras. Dermatol.. Publicado em: 2014-04
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23. Detection of acute cerebral hemorrhage in rabbits by magnetic induction
Acute cerebral hemorrhage (ACH) is an important clinical problem that is often monitored and studied with expensive devices such as computed tomography, magnetic resonance imaging, and positron emission tomography. These devices are not readily available in economically underdeveloped regions of the world, emergency departments, and emergency zones. We have
Braz J Med Biol Res. Publicado em: 2014-02
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24. Treatment and education reduce the severity of schistosomiasis periportal fibrosis
Introduction This study evaluates the factors associated with the development of severe periportal fibrosis in patients with Schistosoma mansoni. Methods A cross-sectional study was conducted from April to December 2012 involving 178 patients infected with S. mansoni who were treated in the Hospital das Clínicas of Pernambuco, Brazil. Information regardi
Rev. Soc. Bras. Med. Trop.. Publicado em: 2013-07