Influence of specimen orientation on determination of elesticity in static bending

Icimoto, Felipe Hideyoshi; Ferro, Fabiane Salles; Almeida, Diego de Almeida de Henrique; Cristoforo, André Luis; Lahr, Francisco Antônio Rocco

doi:10.4067/s0718-221x2015005000022

Cited by 12 publications

(11 citation statements)

References 12 publications

(4 reference statements)

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“…The analysis relating all woods allowed minimizing the inherent variability of each species (Icimoto et al, 2015;Machado et al, 2013), which corroborated the results obtained in the regression models shown in Table 4.…”

Section: Resultssupporting

confidence: 81%

Apparent Density as an Estimator of Wood Properties Obtained in Tests Where Failure Is Fragile

et al. 2020

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The use of new wood species in construction requires knowledge of their properties for safer and more economical structural sizing. In Brazil, structural projects are carried out according to the standard document ABNT NBR 7190:1997. Tests required by this standard for the complete characterization of species require large machines with high costs, which are present only in large research centers. Considering the lack of experimental determination, this study aimed, with the help of analysis of variance of regression models, to investigate the possibility of estimating, through apparent density, wood properties obtained in tests where failure is considered fragile, allowing the estimation of properties of species still little used. Ten wood species belonging to the hardwood group (cambara, cedro, cedrorana, copaiba, angelim-araroba, castelo, oiticicaamarela, guarucaia, guaicara, and garapa), covering all strength classes established in the standard ABNT NBR 7190:1997, were used. The results showed that shear strength parallel to the grain (fv0) was the only property that could be estimated by apparent density (ρ12), with an R 2 above 50%. Tensile strength normal to the grain (ft90) and splitting strength (fs0) showed poor fit quality.

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Section: Resultssupporting

confidence: 81%

Apparent Density as an Estimator of Wood Properties Obtained in Tests Where Failure Is Fragile

et al. 2020

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“…This tree usually grows in moist areas and near water sources at about modulus of elasticity (MOE) of tropical hardwood such as longitudinal resonance method, flexural resonance method and ultrasound method instead of using the static bending test (Baar et al 2015). However, the MOE in static bending test was related to wood sample orientation on each of its four faces because the choice of face is significant to modulus strength (Icimoto et al 2015). Therefore, basic information on properties of planted juvenile N. cadamba wood is necessary in order to study their potential as a substitute material for wood based industry.…”

Section: Introductionmentioning

confidence: 99%

Physical and mechanical properties of juvenile wood from Neolamarckia cadamba planted in west Malaysia

Mahmud

Hashim

Saleh

et al. 2017

Maderas, Cienc. tecnol.

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Juvenile Neolamarckia cadamba or kelempayan tree has been harvested from forest plantation and converted into sawn timber. Some basic properties of timber such as physical and mechanical were determined from different parts of the tree namely lower, center and upper. The physical properties were evaluated. The mechanical properties were conducted using small test clear specimens. The results indicated that the physical and mechanical properties of the lower portion of the trunk were significantly superior compared to the upper portion of the trunk. The investigation revealed that the wood be able to use as a substitute material of the furniture components after some modification undertaken on its properties.

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“…The specimens were evaluated in the static bending and fatigue tests with faces in the same positions, thus avoiding the effects of wood anisotropy that could interfere with the analysis of results (Icimoto et al, 2013;Icimoto et al, 2015).…”

Section: Methodsmentioning

confidence: 99%

INFLUENCE OF FATIGUE ON BENDING OF Pinus caribaea WOOD

et al. 2020

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This research aimed to evaluate the effect of the number of fatigue cycles (NC, 0reference, 450, 4500, 45000, and 90000) for frequencies (Fr) of oscillation equal to 0.5 and 1.0 Hz on the modulus of elasticity (E m) and operating stress (σ m) in the static bending of Pinus caribaea wood. E m and σ m were determined taking into account three specimens (SPEC) manufactured for reference condition and another three for each of the four NC levels and each Fr level, resulting in 27 SPEC. Sixty experimental determinations were obtained, being the approximate total time of sample exposure to fatigue of 350 hours. The same specimens used to determine E m and σ m for the reference condition were also used (via non-destructive tests) to obtain these properties for all fatigue cycles. The frequency and number of cycles significantly influenced both investigated properties. Reductions in E m and σ m values were observed after 45000 cycles. The progressive increase in the number of fatigue cycles caused more marked reductions in mechanical properties when compared to the increase in the frequency of oscillation.

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Influence of specimen orientation on determination of elesticity in static bending

Cited by 12 publications

References 12 publications

Apparent Density as an Estimator of Wood Properties Obtained in Tests Where Failure Is Fragile

Apparent Density as an Estimator of Wood Properties Obtained in Tests Where Failure Is Fragile

Physical and mechanical properties of juvenile wood from Neolamarckia cadamba planted in west Malaysia

INFLUENCE OF FATIGUE ON BENDING OF Pinus caribaea WOOD

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