Etude Expérimentale et Analyse Probabiliste du Comportement à la Rupture en Traction de Composites Verre-Perlon-Acrylique à Usage Orthopédiqu

Achouri, Sihem; Redjel, Bachir

doi:10.12816/0027882

Cited by 2 publications

(4 citation statements)

References 7 publications

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“…The Weibull parameter (m) is used to assess the distribution of structural defects in the material: when m < 20, then the brittle failure of the material is due to the stress on the material [62]. This parameter m is deduced from the graphical solution of Equation ( 12) considered as an equation of the type Y = mx + 1 with Y = ln ð−ln ð1 − P r ÞÞ, mx = m ln ðσÞ, b = m ln ðσ 0 Þ [63].…”

Section: Mechanical Characterisation Of Ep-rvf In Three-pointmentioning

confidence: 99%

Effect of Raphia vinifera Fibre Size and Reinforcement Ratio on the Physical and Mechanical Properties of an Epoxy Matrix Composite: Micromechanical Modelling and Weibull Analysis

Youbi

Harzallah

Tagne

et al. 2023

International Journal of Polymer Science

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This study evaluates the effects of lengths and reinforcement ratio of Raphia vinifera fibres (RVFs) on the physical and mechanical properties of an epoxy matrix composite. Three volume fractions (20%, 30%, and 40%) and three lengths (5, 10, and 15 mm) of fibres were used to produce the composite, and the samples were subjected to the absolute and apparent density, porosity, water absorption rate, and tensile and flexural strength. The probability of failure of the composite is described by the means of two-factor Weibull model. In addition, a theoretical approach to predict mechanical characteristics based on empirical models was carried out. The results show that the addition of RVF decreases the density of the composite, while the porosity and absorption rate increase. The mechanical test shows that the tensile and flexural stress and Young’s modulus of the composite are lowered compared to those of the resin alone. Multivariate analysis of variance (MANOVA) and Tukey test showed that fibre lengths and reinforcement ratio significantly lower the mechanical properties of the composite. The distribution of strength and Young’s modulus follows Weibull’s law. Furthermore, the Cox–Krenkel mathematical model has the best approximated model for the experimental results after the tensile test. Based on these results, this material could be used as reinforcement parts for vehicle backrests or interior decoration in the construction industry.

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Section: Mechanical Characterisation Of Ep-rvf In Three-pointmentioning

confidence: 99%

Effect of Raphia vinifera Fibre Size and Reinforcement Ratio on the Physical and Mechanical Properties of an Epoxy Matrix Composite: Micromechanical Modelling and Weibull Analysis

Youbi

Harzallah

Tagne

et al. 2023

International Journal of Polymer Science

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“…Similar results have been observed for various tropical hardwood species in the literature. 53 The Weibull modulus (m) of between 4.34 and 9.87 shows that the material has a fracture rate comparable to that of Andiroba, 65 Azobé 66 and Gmelina arborea, which is an angiosperm of the Lamiaceae family and the genus Gmelina. 48 In view of these results, the woods studied could be an alternative to these species for construction applications such as parquetry, staircases, joinery, and in the furniture industry for cabinetmaking, turning, veneering and structural purposes, 22 Standard.…”

Section: Mechanical Propertiesmentioning

confidence: 98%

“…is estimated using the mean rank approximation (Herd Johnson approximation), 53 where f(x) is the density of the two-parameter Weibull distribution, β is the shape parameter of the distribution (β = m), x is the independent variable, α is the shape parameter of the distribution, Pr is the probability of failure, m is the Weibull parameter, X and X 0 are the experimental and normalisation magnitudes (MPa) respectively (X and X 0 are E and E 0 for modulus, σ and σ 0 for stress), i is the sample rank, and N is the size of the distribution.…”

Section: Mechanical Characterisationmentioning

confidence: 99%

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Physical and mechanical properties of two tropical wood (Detarium macrocarpum and Piptadeniastrum africanum) and their potential as substitutes to traditionally used wood in Cameroon

Kana,

Biwolé,

Mejouyo Huisken

et al. 2024

International Wood Products Journal

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This study aimed to characterise two little-known woods and discuss their potential to replace those heavily exploited in Cameroon's forests. Amouk (Detarium macrocarpum) and Dabema (Piptadeniastrum africanum) were characterised for their physical and mechanical properties. Density, shrinkage, desorption kinetics, shear strength, tensile strength and modulus of elasticity (MOE) in compression and flexion were determined. A Weibull analysis was performed to predict their failure. It was found that Amouk and Dabéma can be classified as medium-heavy wood with low shrinkage and desorption, following Midilli's empirical model. The physical and mechanical characterisations show that the density, strength and MOE parameters of the woods are close to each other and enable them to be classified as medium-strength woods. The probability of failure in compression follows Weibull's law. These woods can, therefore, be used in structural applications such as construction, replacing common woods.

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Etude Expérimentale et Analyse Probabiliste du Comportement à la Rupture en Traction de Composites Verre-Perlon-Acrylique à Usage Orthopédiqu

Cited by 2 publications

References 7 publications

Effect of Raphia vinifera Fibre Size and Reinforcement Ratio on the Physical and Mechanical Properties of an Epoxy Matrix Composite: Micromechanical Modelling and Weibull Analysis

Effect of Raphia vinifera Fibre Size and Reinforcement Ratio on the Physical and Mechanical Properties of an Epoxy Matrix Composite: Micromechanical Modelling and Weibull Analysis

Physical and mechanical properties of two tropical wood (Detarium macrocarpum and Piptadeniastrum africanum) and their potential as substitutes to traditionally used wood in Cameroon

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