Flexure
Mostrando 13-24 de 100 artigos, teses e dissertações.
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13. Single variable new first-order shear deformation theory for isotropic plates
Abstract This paper presents a single variable new first-order shear deformation plate theory with only one fourth-order partial governing differential equation. It may be noted that, first-order shear deformation plate theory of Mindlin has three coupled partial governing differential equations involving three unknown functions. Even a recently developed ne
Lat. Am. j. solids struct.. Publicado em: 11/10/2018
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14. Underwater endoscopic mucosal resection of serrated adenomas
OBJECTIVES: Serrated polyps, which are considered to be precursors of colorectal carcinoma, include hyperplastic polyps, sessile serrated adenomas and traditional serrated adenomas. With the exception of hyperplastic polyps, all of these lesions must be removed. This study sought to examine whether underwater endoscopic mucosal resection is a safe and effec
Clinics. Publicado em: 08/10/2018
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15. Acanthagrion marinae sp. nov. (Zygoptera: Coenagrionidae): a new species of the apicale group
Abstract Acanthagrion marinae sp. nov. (Holotype male: BRASIL, Mato Grosso do Sul, Campo Grande, UFMS, 20°29’56.26’’S - 54°36’48.43’’W, 547m, leg. M.E. Rodrigues, 03.ii.2015, collection code: VZYG437, MLP) is described and illustrated on the basis of 15 males. The new species belongs to the apicale species group by having horns on S10 and scler
An. Acad. Bras. Ciênc.. Publicado em: 19/07/2018
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16. Experimental analysis of the efficiency of steel fibers on shear strength of beams
Abstract The efficiency of steel fibers for shear strength of reinforced concrete beams is assessed. Four beams were evaluated: control consisted of one beam without any steel fibers and three beams with reinforced concrete with steel fibers. All beams were reinforced for shear strength by a minimum reinforcement rate. The influence of fiber content added to
Lat. Am. j. solids struct.. Publicado em: 16/07/2018
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17. Mechanical behavior of yttria-stabilized tetragonal zirconia polycrystal: Effects of different aging regimens
Abstract This study aimed to characterize and compare the effect of different aging regimens on surface characteristic (topography and roughness), structural stability (phase transformation) and mechanical performance (Weibull analysis) of a Y-TZP ceramic. Discs (15 × 1.2 mm; VITA In-Ceram YZ) were prepared according to ISO 6872-2015 for biaxial flexural st
Braz. oral res.. Publicado em: 07/12/2017
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18. Effect of LZSA Glass-Ceramic Addition on Pressureless Sintered Alumina. Part II: Mechanical Behavior
This work aims to evaluate the influence of a Li2O-ZrO2-SiO2-Al2O3 (LZSA) glass-ceramic on the mechanical behavior of alumina. Composites were prepared from alumina with three different particle sizes and 7 to 21 vol% of an LZSA glass-ceramic composition (11.6Li2O-16.8ZrO2-68.2SiO2-3.4Al2O3,). Specimens were obtained by uniaxial pressing. The optimum sinteri
Mat. Res.. Publicado em: 19/10/2017
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19. Analog Models of Flanking Structures and a Natural Example in the Quadrilátero Ferrífero, Minas Gerais
ABSTRACT The aim of this study is to present analog models of flanking structures and to analyze the Fábrica Nova synform, Quadrilátero Ferrífero, Minas Gerais, from a geometric point of view. We set up seven models using a linear viscous silicone and produced flanking structures with a shear velocity of 2 cm h-1. At different initial orientations with re
An. Acad. Bras. Ciênc.. Publicado em: 31/07/2017
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20. Avaliação da Resistência Interlaminar do Compósito PEI/Fibras de Carbono Soldado pelo Método de Resistência Elétrica
Resumo: O presente trabalho tem como principal objetivo avaliar a efetividade do processo de soldagem por resistência elétrica em compósitos de matriz poli (éterimida) reforçados com fibras contínuas de carbono, a partir do estudo das propriedades térmicas e mecânicas da junta soldada. Para a avaliação das propriedades térmicas, as amostras do mat
Soldag. insp.. Publicado em: 2016-09
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21. Analysis of Stress and Fracture Strength of Zirconia Implants after Cyclic Loading
AbstractThe aim of this study was to manufacture a new zirconia implant (Y-TZP) and to evaluate the fracture strength and stresses generated after cyclic loading compared to titanium implants. Thirty-three zirconia and titanium implants were fabricated. The stress generated around the implants was observed by photoelastic analysis. The implants were then sep
Mat. Res.. Publicado em: 2015-10
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22. Flexure of thick orthotropic plates by exponential shear deformation theory
In the present paper, a variationally consistent exponential shear deformation theory taking into account transverse shear deformation effect is presented for the flexural analysis of thick orthotropic plates. The inplane displacement field uses exponential function in terms of thickness coordinate to include the shear deformation effect. The transverse shea
Lat. Am. j. solids struct.. Publicado em: 2013-05
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23. Flexural-torsional vibration analysis of axially loaded thin-walled beam
The present paper considers the flexure-torsion coupled vibrations of axially loaded thin-walled beams with arbitrary open cross section, by means of an exact solution. The effects of axial force, warping stiffness and rotary inertia are included in the present formulations. In the case of simply supported thin-walled beam, a closed-form solution for the cou
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012-09
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24. Mechanical properties of recycled PET fibers in concrete
Fiber-reinforced concrete represents the current tendency to apply more efficient crack-resistant concrete. For instance, polyethylene terephthalate (PET) is a polyester polymer obtained from recyclable bottles; it has been widely used to produce fibers to obtain cement-based products with improved properties. Therefore, this paper reports on an experimental
Materials Research. Publicado em: 31/07/2012