Bond Stress
Mostrando 13-24 de 105 artigos, teses e dissertações.
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13. On the Processing and Properties of Clay/Polymer Nanocomposites CPNC
AbstractAn experimental investigation followed by fundamental characterization and discussion on the effect of nanoclay filler on the mechanical and fracture properties of polymer matrix was carried out. The study was carried out on clay/polymer nanocomposite made of High Density polyethylene (HDPE M40060) produced by Saudi Arabian company SABIC and montimor
Lat. Am. j. solids struct.. Publicado em: 2015-04
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14. Failure behavior modeling of slender reinforced concrete columns subjected to eccentric load
AbstractThis work presents a numerical model to simulate the failure behavior of slender reinforced concrete columns subjected to eccentric compression loads. Due to the significant influence of the lateral displacements on the loading state provided by an eccentric load, geometric nonlinearity is considered. The responses of the concrete in tension and comp
Lat. Am. j. solids struct.. Publicado em: 2015-03
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15. Influence of periodontal ligament simulation on bond strength and fracture resistance of roots restored with fiber posts
Objective: Considering that periodontal ligament simulation may influence the stress distribution over teeth restored with intraradicular retainers, this study aimed to assess the combined effect of mechanical cycling and periodontal ligament simulation on both the bond strength between fiber posts and root dentin and the fracture resistance of teeth restor
J. Appl. Oral Sci.. Publicado em: 2014-10
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16. Consequences of enamel preparation with sodium hypochlorite, polyacrylic and phosphoric acids for the bonding of brackets with resin-modified glass ionomer cements
The aim of this study was to evaluate the effects of deproteinization with 5.25% sodium hypochlorite (NaOCl) prior to enamel conditioning with 10% polyacrylic acid (PAA) and 35% phosphoric acid (PA) on the bond strength (BS) of brackets bonded with resin-modified glass ionomer cement (RMGIC). One hundred human premolars extracted for orthodontic reasons were
Mat. Res.. Publicado em: 17/09/2013
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17. Avaliação da resitência de união de pinos de fibra de vidro cimentados com diferentes protocolos adesivos e submetidos à ciclagem mecânica / Evaluation of the bond strength of fiber posts cemented with different adhesives protocols and submitted to cycling loading
The objective of this study was to evaluate in vitro the bond strength of intracanal posts cemented using different adhesive protocols and not submitted to mechanical cycling. 80 roots were selected from bovine incisors with similar dimensions, which are included in polystyrene resin. The bodies of the test piece were divided into 10 experimental groups (n =
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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18. EFEITO DA FOTOATIVAÇÃO PROLONGADA DE ADESIVOS AUTOCONDICIONANTES NA ADESÃO À DENTINA / Effect of prolonged exposure time of one-step self-etching in dentinbonding
This study evaluated the effect of prolonged exposure times on immediate (IM) and 6-month (6M) adhesive properties: degree of conversion within hybrid layer (DC), silver nitrate uptake (SNU) and resin-dentin bond strenght (μTBS) for three one-step self-etch adhesive systems (Adper Easy Bond [EB], Clearfil S3 Bond [CS3] and Go [GO]).Ninety caries-free ex
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2012
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19. Estudo da distribuição de tensões e da resistência à tração de interfaces adesivas dentina-resina de duas formas de espécimes submetidos a diferentes protocolos de envelhecimento acelerado / Study of stress distribution and tensile bond strength of dentin-resin adhesive interfaces of two types of specimens submitted to different protocols of accelerated aging
The rapid and frequent development of new materials and restorative techniques necessitate rapid assessments to estimate their clinical outcomes. This study sought to evaluate protocols for accelerated aging, in vitro, capable of simulating the performance of adhesive restorations with challenges inherent to the oral environment. The study included 36 molars
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/07/2011
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20. Study of bond behavior between reinforced bar and concrete with epoxi resin. / Estudo da aderência de barras de aço coladas ao concreto com resina Epóxi.
Just like others fields of knowledge, the civil construction is evolving. Hughes investments and the need for new projects improve the speed and the technology usually applied for basic infrastructures development. These scenarios achieve issues as the miss understanding of the behavior of this technological advances in long terms, caused by the few studies
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/03/2011
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21. Influence of specimens' design and manufacturing process on microtensile bond strength to enamel: laboratory and FEA comparison
This study evaluated the effect of specimens' design and manufacturing process on microtensile bond strength, internal stress distributions (Finite Element Analysis - FEA) and specimens' integrity by means of Scanning Electron Microscopy (SEM) and Laser Scanning Confocal Microscopy (LCM). Excite was applied to flat enamel surface and a resin composite build-
Materials Research. Publicado em: 2010-06
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22. Comparação dos ensaios de resistência adesiva por torção e por cisalhamento com fio / A comparison between torsion and wire-loop shear bond strength tests
Objective: verify, by finite element analysis (FEA) and laboratorial tests, if the torsion bond strength test is able to lead adhesive interface to fracture under shear stress and if it would be more advantageous than wire-loop shear test. Material and method: for stress analysis by finite element method, the 3D models of both tests consisted of a resin comp
Publicado em: 2010
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23. Estudo da aderência entre concreto e armadura: análise da influência das fibras de aço / Study of adhesion between concrete and reinforcement: influence of steel fibers
Bond between steel bars and concrete allows the use of reinforced concrete as a construction material. If the bond is appropriate, the cracks will be as little as possible, so the reinforcing bar will be protected by the surrounded concrete. Therefore, the aim of this research was to analyse the influence of steel fiber on mechanical properties of concrete a
Publicado em: 2010
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24. Efeito da ciclagem mecânica na resistência de união à dentina humana de uma resina composta associada a dois sistemas adesivos / Effect of mechanical cycling on the human dentin bond strength, of a composite associated to two adhesive systems
Diante da grande preocupação atual por sorrisos que também embelezem um rosto, a escolha por materiais estéticos impulsiona pesquisas, que tem como objetivo não só melhorar a qualidade, mas, facilitar o uso desses materiais pelos profissionais. Assim, a proposta desse trabalho foi avaliar a influência da ciclagem mecânica na resistência de união de
Publicado em: 2010