Mechanical properties of Gmelina arborea for engineering design

Iwuoha, Stanley Emeka; Seim, Werner; Onyekwelu, Jonathan C.

doi:10.1016/j.conbuildmat.2021.123123

Cited by 10 publications

(6 citation statements)

References 13 publications

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“…49 The cumulative probability of failure is obtained by equation (24) integrating the density function. 50 The value of the Weibull parameter ( m ) is descriptive of the factors that cause a material to break. Indeed, when m < 20, the failure of the material is due solely to the stress of the material during the test.…”

Section: Methodsmentioning

confidence: 99%

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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Section: Methodsmentioning

confidence: 99%

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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“…Details of the procedures leading to the experimental data shown in Table 1, are published in [4]. After obtaining the experimental data, statistical analyses such as the analysis of variance (ANOVA) and the Tukey HSD test were conducted on them using the R-programming language.…”

Section: Methodsmentioning

confidence: 99%

“…Gmelina is not a threatened species and grows across different continents of the world. Recent studies on its mechanical properties and embedment strength, show that it has great potential for use as a construction material [4]. For an optimal use of the material in the construction industry however, a proper understanding of the variation of its strength properties along its height, and between different trees is required to provide valuable information to aid decisions on how to sort the logs in accordance with end-user requirements.…”

Section: Introductionmentioning

confidence: 99%

Variation in Mechanical Properties Within and Between Plantation-Grown Gmelina Arborea Trees

Iwuoha

Seim

2023

World Conference on Timber Engineering (WCTE 2023)

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Recent studies have shown that the material properties of Gmelina -a fast-growing hardwood species, are comparable with those of European-grown softwood species and are suitable for construction purposes. Information on the variation in the material properties which could aid the end use, such as sorting the logs with respect to end user requirement, is lacking. This work is an investigation into the variation of the mechanical properties along the height and between different Gmelina trees, to aid an efficient and effective end use of the material. 10 material properties were experimentally and statistically investigated. The results showed that the material properties of Gmelina do not vary along its height as much as is observed for other timber species. Between the trees, a variation range of 11 -14 % was determined.

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“…Gmelina arborea Roxb. (melina) is an important source of timber production in the Costa Rican market and in other tropical regions of the Americas, Asia, Africa and Oceania (Iwuoha et al, 2021). The species has adaptability to sites of different fertility and versatility of wood uses (Ataguba et al, 2015) such as furniture, pulp production, particleboard or plywood manufacturing (Moya et al, 2019); in addition, it has carbon sequestration potential, an important factor in climate change mitigation (Kaith et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

“…Cloning studies in melina have mainly focused on the analysis of species morphological properties (Li et al 2017) and not so much on wood properties (Rodríguez-Introducción Gmelina arborea Roxb. es una fuente importante de producción de madera en el mercado de Costa Rica y en otras regiones tropicales de América, Asia, África y Oceanía (Iwuoha et al, 2021). La especie tiene adaptabilidad a sitios de diferente fertilidad y versatilidad de usos de la madera (Ataguba et al, 2015) como muebles, producción de pulpa, fabricación de tableros de partículas o terciados (Moya et al, 2019); además, tiene potencial de secuestro de carbono, factor importante en la mitigación del cambio climático (Kaith et al, 2023).…”

Section: Introductionunclassified

Características genéticas de las propiedades de la madera de 14 clones de Gmelina arborea Roxb. en el Pacífico Sur de Costa Rica

Cruz-Vargas,

Gaitán-Álvarez,

Ávila-Arias

et al. 2023

Rev Cha Se Cie For y del Amb

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Introducción: Gmelina arborea Roxb. es plantada en los programas de reforestación con clones para mejorar la productividad.Objetivos: Evaluar las propiedades de la madera y determinar la heredabilidad de 14 clones de G. melina para establecer un ranking genético de selección.Materiales y métodos: El ensayo se estableció con un diseño de bloques completos al azar (seis bloques de seis individuos de cada clon de 36 meses de edad). El volumen y área basal, las propiedades morfológicas del árbol (diámetro, corteza, albura y duramen) y físicas de la madera (peso específico, densidad verde y humedad) se determinaron en cada individuo.Resultados y discusión: Los parámetros de crecimiento no variaron significativamente (P > 0.05) entre los 14 clones. En el análisis genético, el clon no tuvo efecto significativo sobre el peso específico ni el contenido de humedad, mientras que la altura del fuste del árbol sí influyó significativamente sobre todas las variables. La interacción clon*altura no fue significativa en las variables estudiadas. En cuanto al control genético, se determinaron valores altos de heredabilidad individual solo para el porcentaje de duramen. El análisis de ranking evidenció que los mejores clones fueron el 1, 7, 12 y 13, posicionándose en la categoría 1.Conclusiones: Cuatro clones fueron superiores considerando el crecimiento y algunas propiedades de la madera, los cuales presentan potencial para seguir mejorando genéticamente a G. arborea en los programas de reforestación.

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Mechanical properties of Gmelina arborea for engineering design

Cited by 10 publications

References 13 publications

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

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

Variation in Mechanical Properties Within and Between Plantation-Grown Gmelina Arborea Trees

Características genéticas de las propiedades de la madera de 14 clones de Gmelina arborea Roxb. en el Pacífico Sur de Costa Rica

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