Extensometer
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Strain analysis in diametral compression test through digital image correlation
Abstract In the search for alternatives to obtain more information from rock tests and to make them more accessible, this study applies the Digital Image Correlation technique (DIC 2D) in a diametral compression test called Brazilian Test, comparing the result measured by an extensometer with the result obtained by DIC. Rock tests provide information about r
REM - International Engineering Journal. Publicado em: 2022
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2. Growth Stress in Peltophorum dubium and its Correlation with the Growth Variables
ABSTRACT The exploitation of valuable native timber species in forest restoration projects has emerged as a promising strategy to make restoration financially viable. There are few studies regarding the quality of timber from restoration plantations. The aim of this study was to analyze growth stresses by determining the longitudinal residual strain (LRS) a
Floresta Ambient.. Publicado em: 19/03/2018
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3. MODELACIÓN DEL EFECTO DE LA PODA Y RALEO SOBRE LAS DEFORMACIONES RESIDUALES LONGITUDINALES EN Eucalyptus globulus Labill.
ABSTRACT A 12-year-old Eucalyptus globulus plantation forest was studied with the aim of assessing and modeling the effect of both pruning and thinning activities on the growth strain. The stand is located in the Andean foothills of Bío Bío region in Chile. Two forest management activities were carried out after 2 and half years from planting, and were eva
Ciênc. Florest.. Publicado em: 2016-09
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4. DETERMINAÇÃO DAS DEFORMAÇÕES RESIDUAIS LONGITUDINAIS DECORRENTES DAS TENSÕES DE CRESCIMENTO EM Eucalyptus spp. / DETERMINATION OF LONGITUDINAL RESIDUAL DEFORMATION DUE TO THE STRESS OF GROWTH IN Eucalyptus spp.
O presente estudo foi desenvolvido com o objetivo de determinar as deformações residuais longitudinais (DRL), decorrentes das tensões de crescimento em árvores em pé e vivas de diferentes clones de Eucalyptus spp. Para tanto, foram selecionados 12 clones do gênero Eucalyptus com 9 anos de idade, por meio da área basal (G), sendo, estes, plantados em u
Publicado em: 2010
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5. Interação solo-estrutura em edifícios com fundação profunda: método numérico e resultados observados no campo / Soil-structure interaction in buildings with deep foundation: numerical method and results observed in field
Design of concrete structures for multi-story buildings with deep foundation is considered in this work, taking in account the soil-structure interaction. This interaction is analysed with a numerical method where the superstructure (slabs, beams, and columns), and the foundation structural elements (blocks and piles) are considered a unique structure, model
Publicado em: 2009
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6. Evaluation of the characteristics of the wood and of the pulp of Eucalyptus by the application nondestructive methods in living trees / AvaliaÃÃo das caracteristicas da madeira e da polpa de Eucalyptus mediante e aplicaÃÃo de mÃtodo nÃo destrutivo na Ãrvore viva
The eucalyptus wood is the main raw material used for bleached kraft pulp production in Brazil. The conventional methods to evaluate the wood quality for cellulose production include slow and expensive laboratorial methods of production and determination of the wood quality. The quality evaluation of the wood for simpler and faster techniques is a fundamenta
Publicado em: 2007
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7. EstimaÃÃo de ParÃmetros GenÃticos, FenotÃpicos e Ambientais para a Qualidade da Madeira de Eucalyptus em Ãrvores Vivas. / Estimation Of Genetic, Phenotypic And Environmental Parameters For Eucalyptus Wood Quality In Living Trees.
The evaluation of the technological characteristics of wood, in most times, is accomplished through destructive methods. But, that process make it impossible the evaluation of a large number of genetic materials. So, the utilization of non-destructive methods makes it possible to evaluate a large amount of trees, allowing a more intensive selection of trees
Publicado em: 2007
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8. Influence of specimen dimensions on nominal polymerization contraction stress of a dental composite
The objective of the present study was verify the influence of specimen dimensions on polymerization contraction stress of a self-cure dental composite and investigate the influence of confinement (expressed by the ratio between the bonded and unbonded area of the composite, or 'C factor') and volume of the specimen on stress values. The composite was insert
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-09
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9. Interpretação de deformação e recalque na fase de montagem de estrutura de concreto com fundação em estaca cravada / Strain and settlement interpretation in the assembly of a concrete structure supported by driven piles
Although encouraged by several authors and by the Brazilian Foundation Code, reports of actual column loads measurement in natural scale are not frequent in our technical literature, especially in the case of buildings supported by deep foundations. Results of load and settlement measurements at 20 contiguous columns of a structure built in pre-cast reinforc
Publicado em: 2005
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10. INSTRUMENTATION FOR MEASURING DISPLACEMENTS ON ROCKFILL EMBANKMENTS / INSTRUMENTAÇÃO PARA MEDIR DESLOCAMENTOS EM BARRAGENS DE ENROCAMENTO
A construção de Barragens de Enrocamento no Brasil tem se desenvolvido nas últimas décadas, por ser uma solução adequada para regiões onde há falta de solos finos e grande volume de escavações obrigatórias em rocha. Este desenvolvimento está relacionado tanto à quantidade de barragens construídas quanto ao incremento da altura das mesmas. A con
Publicado em: 2004
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11. Effect of Gibberellic Acid on the Plasticity and Elasticity of Avena Stem Segments 1
Extensibility characteristics of Avena stem segments treated with gibberellic acid (GA) were investigated in living internodes using a microgrowth method and in partially extracted cell walls subjected to Instron extensometer analysis. Both techniques showed that treatment with GA greatly increases internodal plasticity, but has virtually no effect on intern
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12. Enhancement of Wall Loosening and Elongation by Acid Solutions 1
The ability of low pH and CO2 to induce rapid cell elongation and wall loosening in the Avena coleoptile has been examined with the use of a continuous growth-recording technique and an Instron extensometer, respectively. In particular, the properties of the response to hydrogen ions have been examined in detail and have been compared with the responses init