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Prediction of mechanical performance of acetylated MDF at different humid conditions

Ahmed, Sheikh Ali and Adamopoulos, Stergios and Li, Junqiu and Kovacikova, Janka (2020). Prediction of mechanical performance of acetylated MDF at different humid conditions. Applied Sciences. 10 , 8712
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Abstract

Change of relative humidity (RH) in surrounding environment can greatly affect the physical and mechanical properties of wood-based panels. Commercially produced acetylated medium density fiberboard (MDF), Medite Tricoya®, was used in this study to predict strength and stiffness under varying humid conditions by separating samples in parallel (//) and perpendicular (⊥) to the sanding directions. Thickness swelling, static moduli of elasticity (MOEstat) and rupture (MORstat), and internal bond (IB) strength were measured at three different humid conditions, i.e., dry (35% RH), standard (65% RH) and wet (85% RH). Internal bond (IB) strength was also measured after accelerated aging test. A resonance method was used to determine dynamic modulus of elasticity (MOEdyn) at the aforementioned humid conditions. Linear regression and finite element (FE) analyses were used to predict the MDF’s static bending behavior. Results showed that dimensional stability, MOEstat, MORstat and IB strength decreased significantly with an increase in RH. No reduction of IB strength was observed after 426 h of accelerated aging test. A multiple regression model was established using MOEdyn and RH values to predict MOEstat and MORstat. In both directions (// and ⊥), highly significant relationships were observed. The predicted and the measured values of MOEstat and MORstat were satisfactorily related to each other, which indicated that the developed model can be effectively used for evaluating the strength and stiffness of Medite Tricoya® MDF samples at any humid condition. Percent errors of two different simulation techniques (standard and extended FE method) showed highly efficient way of simulating the MDF structures with low fidelity.

Authors/Creators:Ahmed, Sheikh Ali and Adamopoulos, Stergios and Li, Junqiu and Kovacikova, Janka
Title:Prediction of mechanical performance of acetylated MDF at different humid conditions
Year of publishing :2020
Volume:10
Article number:8712
Number of Pages:16
ISSN:2076-3417
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Wood Science
(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 205 Materials Engineering > Composite Science and Engineering
Keywords:acetylation, wood fiber, strength, stiffness, internal bonding strength, thickness swelling, regression, finite element analysis
URN:NBN:urn:nbn:se:slu:epsilon-p-109099
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-109099
Additional ID:
Type of IDID
DOI10.3390/app10238712
ID Code:19214
Faculty:S - Faculty of Forest Sciences
Department:(S) > Department of Forest Biomaterials and Technology
Deposited By: SLUpub Connector
Deposited On:11 Dec 2020 10:03
Metadata Last Modified:15 Jan 2021 19:02

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