Fracture Criterion
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Numerical and experimental investigation of forming limit diagrams of 6063 aluminum alloy sheets using Ayada ductile fracture criterion and the second derivative of large strain criterion at increased temperatures
Abstract The present study investigated the forming limit diagrams (FLDs) of aluminum alloy 6063 sheets using numerical and experimental methods at increased temperatures. In the numerical section, for the first time, the Ayada ductile fracture criterion and the second derivative of the large strain criterion were used. ABAQUS finite element (FE) analysis so
Lat. Am. j. solids struct.. Publicado em: 17/09/2018
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2. Polymerization shrinkage stress of composite resins and resin cements – What do we need to know?
Abstract Polymerization shrinkage stress of resin-based materials have been related to several unwanted clinical consequences, such as enamel crack propagation, cusp deflection, marginal and internal gaps, and decreased bond strength. Despite the absence of strong evidence relating polymerization shrinkage to secondary caries or fracture of posterior teeth,
Braz. oral res.. Publicado em: 28/08/2017
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3. Investigation of High-Speed Cryogenic Machining Based on Finite Element Approach
Abstract The simulation of cryogenic machining process because of using a three-dimensional model and high process duration time in the finite element method, have been studied rarely. In this study, to overcome this limitation, a 2.5D finite element model using the commercial finite element software ABAQUS has been developed for the cryogenic machining proc
Lat. Am. j. solids struct.. Publicado em: 2017-03
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4. Numerical Modelling of Crack Propagation in Cement PMMA: Comparison of Different Criteria
Modelling of a crack propagating through a finite element mesh under mixed mode conditions is of prime importance in fracture mechanics. In this paper, three different crack growth criteria and the respective crack paths prediction in the cement mantle of the reconstructed acetabulum are compared. The maximum tangential stress (MTS) criterion, the minimum st
Mat. Res.. Publicado em: 04/07/2016
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5. Investigation of Fracture in an Interface Crack Between Bone Cement and Stainless Steel
AbstractInterface strength is considered as one of the most influential factors in the long-term durability of the replaced joint in cemented total hip replacement. Several researchers have suggested that the damage initiation in a replaced joint is a mechanical phenomenon primarily taking place in the vicinity of cement-prosthesis interface. In this study,
Lat. Am. j. solids struct.. Publicado em: 2015-03
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6. Epidemiological profile of extremity fractures in victims of motorcycle accidents
Objective: Show the epidemiological profile of limb fractures in victim of motorcycle accident seen at the Emergency Department of Hospital Universitário Evangélico de Curitiba (HUEC), Curitiba, PR, Brazil, from January 2007 to December 2013, as well as to compare the results with data from the literature.Methods:This is a retrospective, descriptive, obser
Acta ortop. bras.. Publicado em: 2015-02
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7. Interaction Analysis of Non-aligned Cracks Using Extended Finite Element Method
Abstract Multiple flaws are frequently occurred in actual components, such as pressure vessels and power plants. These flaws will in some circumstances lead to more severe effects than single flaw alone. Assessment of the interaction behavior is based on the evaluation of alignment and combination of these multiple flaws. In the current standards, multiple c
Lat. Am. j. solids struct.. Publicado em: 2015
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8. Experimental investigation on the yield behavior of Nomex honeycombs under combined shear-compression
This paper presents an experimental investigation on the yield behavior of Nomex honeycombs under combined shearcompression with regard to out-of-plane direction. Four different types of specimens were designed in order to investigate the influence of in-plane orientation angle on the yield behavior of honeycombs under combined loads. Two different failure m
Lat. Am. j. solids struct.. Publicado em: 2012-08
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9. Numerical simulations and experiments of vehicle structures under low speed crash loadings to evaluate fracture models. / Modelos de falha em análise numérica de estrutura veicular submetida a impacto de baixa velocidade.
O presente trabalho visa o estudo e avaliação de diversos modelos de falha através de ensaios experimentais e análises numéricas. A caracterização do material foi feita por meio de ensaios de tração de espécimes com e sem entalhe e de cisalhamento, para prover dados em uma ampla faixa de triaxialidade. A calibração dos parâmetros necessários pa
Publicado em: 2010
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10. CHARACTERIZATION OF MATERIALS TO ENSURE THE CONDUCTIVITY OF HYDRAULICALLY INDUCED FRACTURES IN OIL WELLS AND GAS / CARACTERIZAÇÃO DE MATERIAIS PARA GARANTIR A CONDUTIVIDADE DE FRATURAS HIDRAULICAMENTE INDUZIDAS EM POÇOS DE PETRÓLEO E GÁS
Materials used as propant in hydraulic fracturing to improve production in oil wells must present properties that promote machanical stability of the fracture and sustain the flow of fluid from the reservoir through the fracture filled with the propant material. Due to diferent service conditions found in oil reservoirs, materials with different group of pro
Publicado em: 2010
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11. Comportamento à fratura de defeitos circunferenciais em dutos submarinos instalados por bobinamento
This study aims to evaluate the limit of the fracture instability for submarine pipelines installed by the Reeling Method, determining the maximum allowable ductile tearing for use in analysis of structural integrity through correlations with SENT specimens (Single Edge Notched Tension). The Standard DNV-RP-F108, which gives guidance to testing and analysis
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2009
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12. Tenacidade à fratura translaminar dinâmica de um laminado híbrido metal-fibra titânio-grafite de grau aeronáutico / Dynamic translaminar fracture toughness of aeronautical grade titanium-graphite hybrid fiber-metal laminate
Several dynamic translaminar fracture toughness criteria have been determined for TiGr hybrid fiber-metal laminate through Linear Elastic (K-factor) and Elastic-Plastic (J-integral) Fracture Mechanics (LEFM and EPFM, respectively) concepts and methodologies. Instrumented Charpy impact testing was carried out over a wide range of temperatures under two loadin
Publicado em: 2009