Residual Stresses Measurement
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Mechanical behavior of PVD coatings deposited on ADI
ABSTRACT In this work, the mechanical behavior of the coated ADI system is studied. For this purpose, single layer Ti and bilayer Ti/TiN and TiAl/TiAlN coatings, with different thicknesses, were deposited by the PVD technique of cathodic arc deposition on high strength ADI substrates using industrial and experimental devices. The characterization of the coat
Matéria (Rio J.). Publicado em: 25/11/2019
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2. Measurement of Residual Stresses in Welded Joints by DCP Method
Residual stresses on welded joints have been studied by several methods. In this present work, residual stresses was measured by a novel methodology under development named Displacement of Coordinated Points (DCP). To evaluate anisotropy effects in steel plates, two directions of the weld bead were considered: Welding was performed in both parallel and trans
Mat. Res.. Publicado em: 16/07/2018
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3. Development of methodology for measurements of residual stresses in welded joint based on displacement of points in a coordinated table
Residual stresses in a welded joint of ASTM A131 grade AH32 steel was measured either by the X-ray diffraction or by displacements of referenced points measured on a coordinate measuring machine before and after heat treatment. For all tests, the welding was performed with Shielded Metal Arc Welding, vertical-up position, by a certified welder. After welding
Mat. Res.. Publicado em: 22/01/2013
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4. Tensiones residuales en uniones soldadas por FSW en aluminio 7075-T651
Residual stresses could be a relevant issue in the structural integrity of a component in service and usually have a major influence on their fatigue life, among other failure mechanisms. In recent years Friction-Stir Welding (FSW) has revolutionized the welding technology. Its main application has been given in aluminum alloys, but nowadays can be applicabl
Soldag. insp.. Publicado em: 2012-12
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5. Avaliação de tensão residual gerada pelo processo de usinagem utilizando acustoelasticidade / Evaluation of residual stress generated by maching process using acustoelasticity
O processo de usinagem de materiais metálicos causa tensões residuais que podem alcançar valores significativos e influenciar na vida em serviço de componentes mecânicos. Definir o processo adequado para cada aplicação requer a previsão de quão elevada será a tensão gerada em função das variáveis do processo utilizado. Para a usinagem de chapas
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2010
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6. A fatigue life prediction model of welded joints under combined cyclic loading. / Um modelo para previsão de vida à fadiga de juntas soldadas submetidas a carregamentos combinados.
The main purpose of this work is to develop a practical and robust methodology to evaluate the fatigue life in seam weld joints fabricated with GMAW process when subjected to combine cyclic loading. The maximum linear stress at the typical crack initiation region, better known as hot spot stress, was used to calculate the fatigue life through high cycle fati
Publicado em: 2010
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7. Numerical and experimental analysis of the residual stresses induced by shot peening in automotive springs. / Análise numérico-experimental das tensões residuais induzidas por jateamento com granalha em molas automotivas.
The shot peening is a cold-working mechanical process where a stream of tiny small balls is impelled against the surface of components. Each impact causes plastic deformation and introduces compressive residual stresses on the surface, which consequently increases their resistance to fatigue. This process is widely used in the automotive industry, particular
Publicado em: 2008
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8. Experimental inquiry on chip formation in the machining of ABNT 1045 steel and nodular casting iron / Investigação experimental da formação do cavaco na usinagem do aço ABNT 1045 e do ferro fundido nodular
The chip formation is influenced by several cut parameters which also affect the forces, tensions, powers and temperatures generated during the machining process. Although they have been studied for more than 100 years, still today, the involved mechanisms of deformation are not totally know, due to the fact that the chip formation involves high temperatures
Publicado em: 2008
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9. Welding Residual Stress Evaluation of Small Size Pipes Used in Petroleum Refinering / AVALIAÃÃO DAS TENSÃES RESIDUAIS DE SOLDAGEM EM TUBULAÃÃES DE PEQUENO DIÃMETRO USADAS EM REFINARIA DE PETRÃLEO
The aim of this work was to evaluate the behavior of welding residual stress in small size pipes of ASTM A106 Gr. B steel, welded by manual and automatic GTAW processes. It was also evaluated the effect of the welding heat input on residual stress profile, as well as to correlate the results with microstructure and hardness. The residual stress measurement w
Publicado em: 2007
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10. MEASUREMENT OF RESIDUAL STRESSES IN PIPES DRIVING THE DETERMINING OF EFFORTS IN BURIED PIPELINES / MEDIÇÃO DE TENSÕES RESIDUAIS EM TUBOS VISANDO A DETERMINAÇÃO DE ESFORÇOS EM DUTOS ENTERRADOS
O conhecimento dos esforços de flexão e normal provocados por movimentação de solo é importante para a análise de integridade estrutural de dutos. A existência de tensões residuais é um dos principais obstáculos para obtenção de resultados precisos na determinação de tais esforços. Este trabalho foi desenvolvido com o objetivo de analisar o co
Publicado em: 2007
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11. APPLICATIONS OF FIBER BRAGG GRATING SENSORS IN THE MEASUREMENT OF PH AND OF STRAIN IN HARD THIN FILMS / APLICAÇÕES DE SENSORES A REDE DE BRAGG EM FIBRAS ÓPTICAS NA MEDIÇÃO DE PH E DEFORMAÇÃO DE FILMES FINOS DE ALTA DUREZA
Este trabalho versa sobre duas diferentes aplicações de sensores a redes de Bragg em fibra óptica. A primeira consiste no desenvolvimento de uma técnica de sensoriamento do pH empregando fibra óptica, que visa a monitoração contínua e permanente deste parâmetro em poços de petróleo depletados e de injeção. Nesta aplicação, as redes de Bragg s�
Publicado em: 2006
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12. EVALUATION OF PLASTIC EFFECTS IN RESIDUAL STRESS MEASUREMENT BY THE HOLE DRILLING TECHNIQUE / AVALIAÇÃO DOS EFEITOS DA PLASTICIDADE NA MEDIÇÃO DE TENSÕES RESIDUAIS PELA TÉCNICA DO FURO CEGO
Uma das técnicas mais aplicadas para medir tensões residuais em componentes mecânicos é a técnica do furo cego. Esta técnica é de fácil aplicação industrial e é normalizada pela ASTM E 837. Entretanto, devido à concentração de tensões gerada pelo furo, há restrições quanto à aplicação deste método quando as tensões residuais presentes
Publicado em: 2003