Fatigue Of Composite Materials
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Fatigue survival and damage modes of lithium disilicate and resin nanoceramic crowns
Abstract Polymer-based composite materials have been proposed as an alternative for single unit restorations, due to their resilient and shock absorbing behavior, in contrast to the brittleness of ceramic materials that could result in failure by fracture. Objective: To evaluate the fatigue strength and damage modes of monolithic posterior resin nanoceramic
J. Appl. Oral Sci.. Publicado em: 30/05/2019
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2. New material perspective for endocrown restorations: effects on mechanical performance and fracture behavior
Abstract The aim of this study was to investigate the mechanical performance and the fracture behavior of endocrown restorations prepared using distinct restorative materials. A total of 42 sound molars with similar crown size and shape were cut at 2 mm above the cementoenamel junction and endodontically treated. They were categorized according to the restor
Braz. oral res.. Publicado em: 11/02/2019
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3. Preface to the special issue of the International Symposium on Solid Mechanics (MecSol 2017)
Abstract The International Symposium on Solid Mechanics (MecSol) is a biennial conference which aims to provide a forum to discuss relevant issues associated with solid mechanics. The MecSol 2017 edition was held in the city of Joinville, Brazil, on 26-28 April 2017. Plenary lectures were delivered by researchers from five different countries. The main topic
Lat. Am. j. solids struct.. Publicado em: 22/10/2018
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4. Wear mechanisms of dental composite restorative materials by two different in-vitro methods
In this work two very simple apparatuses, namely the ball crater (or ball-on-plate) and the linear reciprocating (or pin-on-plate) tests, were used in order to investigate the wear mechanisms of TPH Spectrum® and Resilab Master® dental composite resins. Loads in the range of 100 g to 1 kg and a total number of up to 24000 cycles were employed. During some
Mat. Res.. Publicado em: 21/12/2012
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5. Dano em materiais compósitos: SAFECom (Sistema de Análise de Fadiga de Estruturas em Compósito) / Damage in composite materials: SAFECom (System of Analysis of Fatigue for Composites)
O presente trabalho, inicialmente, apresenta uma revisão a cerca de vários métodos de análise de fadiga e tolerância ao dano em materiais compósitos e, em particular, o conceito de elemento crítico e o método da resistência residual é estudado e aplicado à análise de materiais compósitos poliméricos, reforçados por fibras contínuas, sob carga
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/12/2011
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6. Development and characterization of composite materials for production of composite risers by filament winding
Industry has been challenged to provide riser systems which are more cost effective and which can fill the technology gaps with respect to water depth, riser diameter and high temperatures left open by flexibles, steel catenary risers (SCRs) and hybrid risers. Composite materials present advantages over conventional steel risers because composite materials a
Materials Research. Publicado em: 26/08/2011
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7. Evaluation of failure mode of ceramic crowns with and without framework design modification. / Avaliação do modo de falha de coroas cerâmicas com e sem alteração do desenho das infraestruturas
Ceramic crowns have been widely used, however, problems related to brittle fracture of these materials persist, especially in the posterior area. The present study tested the null hypothesis that there were no differences in fatigue resistance related to the framework design as well as to the materials used. One maxillary molar was prepared, reproducing the
Publicado em: 2009
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8. Estudo do desalinhamento das fibras nas propriedades mecânicas de compósitos estruturais de pás eólicas / Study of fiber misalignment effects on the mechanical properties of wind blades structural composites
This work presents the study of waviness influence on the mechanical properties of wind blades structural components fabricated by vacuum infusion. For this purpose, out-of-plane waviness, which is a common manufacturing defect, was induced on glass and carbon reinforced plastics (GRP and CRP) and compared with control laminates without waviness (wave-free c
Publicado em: 2009
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9. Estudo do desalinhamento das fibras nas propriedades mecânicas de compósitos estruturais de pás eólicas / Study of fiber misalignment effects on the mechanical properties of wind blades structural composites
This work presents the study of waviness influence on the mechanical properties of wind blades structural components fabricated by vacuum infusion. For this purpose, out-of-plane waviness, which is a common manufacturing defect, was induced on glass and carbon reinforced plastics (GRP and CRP) and compared with control laminates without waviness (wave-free c
Publicado em: 2009
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10. Crescimento de trinca subcrítico em cerâmicas odontológicas: efeito do material (microestrutura) e do método de ensaio / Growth of crack subcrítico in dental ceramics: effect of the material (Microstructure) and the test method
The objective of this study was to determine the mechanical properties and the microstructure of different dental ceramics in order to understand their influence on the slow crack growth (SCG) parameters, n (crack growth exponent) and ?f0, (scaling parameter), determined by different methods. The five ceramics tested were: porcelains VM7 (Vita) and D (d.Sign
Publicado em: 2007
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11. Mechanical performance of carbon-epoxy laminates. Part II: quasi-static and fatigue tensile properties
In Part II of this work, quasi-static tensile properties of four aeronautical grade carbon-epoxy composite laminates, in both the as-received and pre-fatigued states, have been determined and compared. Quasi-static mechanical properties assessed were tensile strength and stiffness, tenacity (toughness) at the maximum load and for a 50% load drop-off. In gene
Materials Research. Publicado em: 2006-06
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12. OBTENÇÃO E AVALIAÇÃO DO COMPORTAMENTO À FADIGA DE COMPÓSITOS DE MATRIZ DE ALUMÍNIO SUBMETIDOS A DIFERENTES TRATAMENTOS SUPERFICIAIS MECÂNICOS / OBTENTION AND EVALUATION OF THE FATIGUE BEHAVIOUR OF ALUMINIUM MATRIX COMPOSITES SUBJECT TO DIFFERENT MECHANICAL SURFACE TREATMENTS
The objective of this work was the evaluation of the fatigue behaviour of aluminium metal matrix composites (MMC) obtained by powder metallurgy. The testing variables were the volumetric fraction of reinforcements and the type of mechanical surface treatment used. Initially, the composite materials were obtained from aluminium AA 1100 matrix, reinforced with
Publicado em: 2000