Mechanical Dewatering of Wet Oil Palm Lumber Prior to Press-Drying

Fruehwald-Koenig, Katja; Koelli, Nathan; Fruehwald, A.

doi:10.1007/978-981-19-6195-3_2

Cited by 4 publications

(4 citation statements)

References 15 publications

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“…The material is mechanically dewatered and thermohydro-mechanically densified using two densification rates (40 % and 60 %). Further information on the process and elastomechanical properties are given in Fruehwald-Koenig et al [22] and Koelli and Fruehwald-Koenig [23].…”

Section: Densified Materialsmentioning

confidence: 99%

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Flexural Properties of Oil Palm Wood Based Glue Laminated Timber Using Finite Element Method

Hackel

2023

World Conference on Timber Engineering (WCTE 2023)

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The anatomical structure of oil palm wood is only to a limited extent comparable to common wood species used in construction. Typical for monocotyledons, the material is composed of high density vascular bundles and a parenchymatous tissue of lower density. In three experiment sets, the local and global moduli of elasticity (MOE) and the flexural strength of oil palm wood based GLT are determined using FEM and various influencing parameters are investigated in a sensitivity analysis. Furthermore, the application of densified tension lamellas is studied. The results of the modelling are compared with the results from mechanical tests. Significant differences, mainly attributed to the specific parameters of the selected material, are observed. The results of this preliminary study serve as a starting point for computer-aided optimisation and modelling of other oil palm-based products.

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Section: Densified Materialsmentioning

confidence: 99%

“…European standards [4,5]. Before oil palm based GLT can be introduced to the market, it is necessary to create a lamella grading [6] and develop various beam structures in regard to the requirements in the standards. Therefore, expensive material tests need to be performed.…”

Section: Introduction 234mentioning

confidence: 99%

Flexural Properties of Oil Palm Wood Based Glue Laminated Timber Using Finite Element Method

Hackel

2023

World Conference on Timber Engineering (WCTE 2023)

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“…are mainly cultivated in large plantations for palm oil production to be used for food, chemicals, pharmaceuticals and energy. Worldwide, oil palms cover an area of nearly 25 million hectares of which 75% is located in Asia (Fruehwald and Koelli 2019). Due to declining oil production, the palms are felled after an age of 25 years and the area is replanted.…”

Section: Availability Of Oil Palm Woodmentioning

confidence: 99%

“…Many regions where oil palms grow currently suffer from a decline in timber harvested from their tropical forests. The average annual total volume of trunks from oil palm plantation clearings amounts to more than 100 million cubic meters (Fruehwald and Koelli 2019). Recent research has explored the potential commercial uses for oil palm wood.…”

Section: Availability Of Oil Palm Woodmentioning

confidence: 99%

Fruehwald-Koenig, K.1); Heister, L.2): Macro- and Micromechanical Behavior of Oil Palm Wood (Elaeis guineensis JACQ.): Tensile, Compression and Bending Properties

Fruehwald-Koenig

Heister

2022

Preprint

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Being monocotyledons, palms show distinct differences in anatomical structure compared to common wood species. Oil palm wood can be seen as a unidirectional long-fiber-reinforced bio-composite, if vascular bundles are considered reinforcements (fibers) and parenchymatous ground tissue the matrix. The elastomechanical properties in bending (fm, Em), compression parallel (fc,0) and perpendicular (fc,90) and tension parallel (ft,0, Et,0) and perpendicular (ft,90) directions to the vascular bundles of small-size test specimen show a much higher exponential increase in density, following power law relationships, than common wood species and a significant gradient over both trunk height and cross section. The rule-of-mixture cannot be confirmed for ft,0 and Et,0, because the concentration of vascular bundles, as well as the share of fibers within the bundles, is greater in the periphery of the stem than in the central tissue. Furthermore, the cell wall properties themselves are not constant; cell wall thickening is more pronounced in the peripheral than in the central tissue and more in the bottom of the trunk than near the top. The “fibers” of the composite material are not homogeneous nor regularly spaced, which leads to exponents > 1 of the power law relationship. Different from common wood species, the compression strength of oil palm wood exceeds the tensile strength: fc,0 : fm : ft,0 are 2.2 : 3.3…1.7 : 1. The performance indices for minimum weight design by Ashby et al. (1995) are comparable to that for coconut and date palm.

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Dewatering behavior of wet oil palm sawn timber during flat compression

Koelli

2024

Wood Material Science & Engineering

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Mechanical Dewatering of Wet Oil Palm Lumber Prior to Press-Drying

Cited by 4 publications

References 15 publications

Flexural Properties of Oil Palm Wood Based Glue Laminated Timber Using Finite Element Method

Flexural Properties of Oil Palm Wood Based Glue Laminated Timber Using Finite Element Method

Fruehwald-Koenig, K.1); Heister, L.2): Macro- and Micromechanical Behavior of Oil Palm Wood (Elaeis guineensis JACQ.): Tensile, Compression and Bending Properties

Dewatering behavior of wet oil palm sawn timber during flat compression

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