Vibration Method for the Prediction of Aging Effect on Properties of Particleboard and Fiberboard

Maldonado, Ignacio Bobadilla; González, Guillermo Íñiguez; Herrero, Miguel Esteban; Martitegui, Francisco Arriaga

doi:10.13073/fpj-d-11-00137.1

Cited by 4 publications

(1 citation statement)

References 5 publications

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“…Najafi et al (2008) concluded that the length of the piece, wood flour content, use of maleic anhydride grafted polypropylene (MAPP) as a coupling agent, and the incorporation of glass fiber influenced a 16 kHz wave velocity in polypropylene wood composites. Bobadilla et al (2012) concluded that it is possible to estimate the state of deterioration of an OSB panel and its properties through the loss of ultrasonic or stress wave velocity. Meanwhile, determining the C of particleboard by stress wave time was studied by Mendes et al (2012), who observed that the type of material exerts the greatest influence on C.…”

Section: Introductionmentioning

confidence: 99%

Using acoustic testing to estimate strength and stiffness of wood-polymer composites

Hillig,

Bobadilla,

Arriaga

et al. 2023

Maderas-Cienc Tecnol

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This study used non-destructive testing with ultrasonic and stress wave propagation to evaluate bending strength and stiffness of wood-polymer composites. Twelve composite plate products were produced with different formulations of polymer matrix (high- and low-density polyethylene and polypropylene) and type and proportion of flour (coconut shell and wood). Mechanical and acoustic properties were influenced primarily by the type of matrix used in the composite. The greater the proportion of wood and coconut shell flour the higher the wave propagation velocity, stiffness, and strength. We found a correlation between mechanical properties (strength and stiffness) and wave velocity and stiffness coefficient. We also present linear regression equations of the stiffness and strength of the specimen as a function of wave velocity and stiffness coefficient obtained through non-destructive testing. For polypropylene and high-density polyethylene matrix composites, the stiffness coefficient provided a better estimate of stiffness, while for low-density polyethylene the wave velocity provided better results.

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Section: Introductionmentioning

confidence: 99%

Using acoustic testing to estimate strength and stiffness of wood-polymer composites

Hillig,

Bobadilla,

Arriaga

et al. 2023

Maderas-Cienc Tecnol

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Modulus of elasticity assessment of glass-fibre reinforced bark-based panels by acoustic resonance vibration non-destructive test

Tsalagkas

Börcsök

Pásztory

2019

IOP Conf. Ser.: Earth Environ. Sci.

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One of the main properties of solid materials are their stiffness. Acoustic vibration non-destructive tests have been successfully used to predict the stiffness, i.e. Young’s modulus or modulus of elasticity (MOE) values of solid wood and wood-based panels. In this work, there was an attempt to evaluate the relationship of dynamic MOE longitudinal and static MOE values, of low-density panels produced from bark particles reinforced with various length glass fibres. The findings of the results and the observed strong coefficients of determination suggest the possibility of the proposed Non-Destructive Test (NDT) method as a prediction tool for the MOE estimation of similarly produced bark-based panels. By means of this non-destructive method can be tested the materials without breaking the material and the results available right after the test.

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WITHDRAWN: Non-destructive Methods for Evaluating the Physical and Mechanical Aging of Composites

Maldonado¹,

Behzad²,

López

et al. 2022

Preprint

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Wood-plastic composites (WPC) have been developed into new and important wood-based materials because of their benefits for the environment, their economy and their recyclability. When WPCs are used outdoors, they are subjected to a climate with moisture and temperature fluctuations. It is therefore necessary to obtain information on the effects of climate aging on WPCs. This study explores the relationship between laboratory aging, physical and mechanical changes, and the results of non-destructive testing of wood-polymer composites. This was done by testing 45 pieces of composite with 60% wood fibre, 35% low-density polyethylene (LDPE) and 5% additives. A laboratory aging process consisting of a water immersion at 20 and 50°C for a total of 56 days was carried out on composite specimens. During the aging test, several specimen batches were extracted and tested to record their physical (density) and mechanical properties (bending strength and modulus of elasticity). Non-destructive testing was also carried out with ultrasound and stress wave, screw withdrawal resistance meter and penetration tester devices. Temperature was found to have more influence than humidity on the deterioration of the material. A barely significant decrease in density (2-4%) and a clear drop in mechanical properties (20-60%) was also observed. The non-destructive methods used were reliable estimators of composite properties, especially ultrasound wave propagation, coinciding with previous works on other materials.

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Vibration Method for the Prediction of Aging Effect on Properties of Particleboard and Fiberboard

Cited by 4 publications

References 5 publications

Using acoustic testing to estimate strength and stiffness of wood-polymer composites

Using acoustic testing to estimate strength and stiffness of wood-polymer composites

Modulus of elasticity assessment of glass-fibre reinforced bark-based panels by acoustic resonance vibration non-destructive test

WITHDRAWN: Non-destructive Methods for Evaluating the Physical and Mechanical Aging of Composites

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