Digital Image Correlation
Mostrando 13-24 de 51 artigos, teses e dissertações.
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13. Mechanical Characterization and FE Modelling of a Hyperelastic Material
AbstractThe aim of research work is to characterize hyperelastic material and to determine a suitable strain energy function (SEF) for an indigenously developed rubber to be used in flexible joint use for thrust vectoring of solid rocket motor. In order to evaluate appropriate SEF uniaxial and volumetric tests along with equi-biaxial and planar shear tests w
Mat. Res.. Publicado em: 2015-10
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14. Pixel value analysis for detection of simulated early external root resorption
The aim of this study was to determine the efficacy of pixel value analysis using images generated by the Digora™ and Visualix™ systems for the early detection of external root resorption (ERR). Thirty extracted human lower incisors were radiographed using the Digora and Visualix systems; then, ERR was induced by immersing the teeth in 6 mol L-1 of hydro
Braz. oral res.. Publicado em: 15/09/2014
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15. Experimental investigation of mixed-mode-I/II fracture in polymer mortars using digital image correlation method
The purpose of this work is to investigate experimentally the effects of mixed-mode I/II loading on the fracture behavior of polymer mortars. Three point bend beam specimens with offcenter notch were used in plane-strain fracture toughness tests. Two approaches have been simultaneously used to determine the crack opening displacements. The crack mouth openin
Lat. Am. j. solids struct.. Publicado em: 2014-03
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16. Study of anisotropic mechanical properties for aeronautical PMMA
For the properties of polymer are relative to its structure, the main purpose of the present work is to investigate the mechanical properties of the aeronautical PMMA which has been treated by the directional tensile technology. Isodyne images reveal the stress state in directional PMMA. And then, an anisotropic mechanical model is established. Furthermore,
Lat. Am. j. solids struct.. Publicado em: 2014
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17. Experimental analysis and theoretical predictions of the limit strains of a hot-dip galvanized interstitial-free steel sheet
In this work, the formability of a hot-dip galvanized interstitial-free (IF) steel sheet was evaluated by means of uniaxial tensile and Forming Limit Curve (FLC) tests. The FLC was defined using the flat-bottomed Marciniak's punch technique, where the strain analysis was made using a digital image correlation software. A plastic localization model was also p
Mat. Res.. Publicado em: 08/02/2013
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18. Análise inversa utilizando o método dos elementos de contorno e correlação de imagens digitais / Inverse analysis utilizing the boundary element method and digital image correlation
A identificação de parâmetros físicos e geométricos utilizando medições experimentais é um procedimento comum no tratamento de muitos problemas da ciência e engenharia. Neste contexto, a análise inversa apresenta-se como uma importante ferramenta no tratamento desses problemas. Este trabalho apresenta formulações que acoplam o uso do método dos
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/07/2012
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19. Comparação entre mapas de solos obtidos pelos métodos convencional e digital numa área complexa / Comparison between soil maps obtained by conventional and digital methods in complex area
Soil maps are essential for the development of agricultural areas in an economically viable and environmentally friendly manner. So far, Brazil only has soil maps of small scale (1:250,000 to 1:1,000,000), whose use is limited to agricultural and environmental planning at the farm. Despite its importance, in Brazil a few mappings have been carried out by pub
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/04/2012
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20. Effect of image resolution manipulation in rearfoot angle measurements obtained with photogrammetry
The aim of this study was to investigate the influence of image resolution manipulation on the photogrammetric measurement of the rearfoot static angle. The study design was that of a reliability study. We evaluated 19 healthy young adults (11 females and 8 males). The photographs were taken at 1536 pixels in the greatest dimension, resized into four differe
Brazilian Journal of Medical and Biological Research. Publicado em: 2012-09
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21. Study of an anisotropic polymeric cellular material under compression loading
This paper emphasizes the influence of micro mechanisms of failure of a cellular material on its phenomenological response. Most of the applications of cellular materials comprise a compression loading. Thus, the study focuses on the influence of the anisotropy in the mechanical behavior of cellular material under cyclic compression loadings. For this study,
Materials Research. Publicado em: 27/03/2012
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22. Contribuição da imagem tridimensional para o diagnóstico do cisto de retenção mucoso do seio maxilar / Three-dimensional Image Contributing to the diagnosis of Mucous Retention cyst in Maxillary Sinus
Objective: To detect the mucous retention cyst of maxillary sinus (MRCMS) through panoramic radiography and cone beam computed tomography (CBCT). Methods: Six thousand panoramic radiographs were selected from digital database for diagnostic analysis of MRCMS. We detected suggestive images of MRCMS in 185 radiographs of patients who were located and invited t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/05/2011
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23. Desenvolvimento de técnica de análise de imagens digitais para avaliação do estágio da fibrose em biópsias hepáticas de pacientes portadores de hepatite crônica por vírus da hepatite B e C / Development of a digital image analysis technique for the evaluation of fibrosis stage in liver biopsies of HBV and HCV patients
The hepatitis caused by viruses are the most frequent, principally the virus B (HBV) and C (HCV) hepatitis. The anatomopathologic study of the liver biopsy is considered the gold standard for the evaluation of architectural distortion and degree o fibrosis of the livers parenchyma, important prognostic factors for the patients with chronic viral hepatitis. I
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/01/2011
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24. Sample size for measurement of root traits on common bean by image analysis.
Evaluation of root traits may be facilitated if they are assessed on samples of the root system. The objective of this work was to determine the sample size of the root system in order to estimate root traits of common bean (Phaseolus vulgaris L.) cultivars by digital image analysis. One plant was grown per pot and harvested at pod setting, with 64 and 16 po
Pesquisa Agropecuária Brasileira. Publicado em: 2011