Prediction of Mechanical Performance of Acetylated MDF at Different Humid Conditions
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<sup>®</sup>, was used in this study to predict strength and stiffne...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/23/8712 |
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| author | Sheikh Ali Ahmed Stergios Adamopoulos Junqiu Li Janka Kovacikova |
| author_facet | Sheikh Ali Ahmed Stergios Adamopoulos Junqiu Li Janka Kovacikova |
| author_sort | Sheikh Ali Ahmed |
| collection | DOAJ |
| description | 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<sup>®</sup>, 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 (MOE<sub>stat</sub>) and rupture (MOR<sub>stat</sub>), 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 (MOE<sub>dyn</sub>) 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, MOE<sub>stat</sub>, MOR<sub>stat</sub> 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 MOE<sub>dyn</sub> and RH values to predict MOE<sub>stat</sub> and MOR<sub>stat</sub>. In both directions (// and ⊥), highly significant relationships were observed. The predicted and the measured values of MOE<sub>stat</sub> and MOR<sub>stat</sub> 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<sup>®</sup> 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. |
| first_indexed | 2024-03-10T14:18:49Z |
| format | Article |
| id | doaj.art-d1860a59f3654950a15c531dc1f09a83 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T14:18:49Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-d1860a59f3654950a15c531dc1f09a832023-11-20T23:34:27ZengMDPI AGApplied Sciences2076-34172020-12-011023871210.3390/app10238712Prediction of Mechanical Performance of Acetylated MDF at Different Humid ConditionsSheikh Ali Ahmed0Stergios Adamopoulos1Junqiu Li2Janka Kovacikova3Department of Forestry and Wood Technology, Faculty of Technology, Linnaeus University, Georg Lückligs Plats 1, 351 95 Växjö, SwedenDepartment of Forest Biomaterials and Technology, Division of Wood Science and Technology, Vallvägen 9C-D, 756 51 Uppsala, SwedenDepartment of Forestry and Wood Technology, Faculty of Technology, Linnaeus University, Georg Lückligs Plats 1, 351 95 Växjö, SwedenDepartment of Mechanical Engineering, Faculty of Technology, Linnaeus University, Georg Lückligs Plats 1, 351 95 Växjö, SwedenChange 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<sup>®</sup>, 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 (MOE<sub>stat</sub>) and rupture (MOR<sub>stat</sub>), 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 (MOE<sub>dyn</sub>) 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, MOE<sub>stat</sub>, MOR<sub>stat</sub> 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 MOE<sub>dyn</sub> and RH values to predict MOE<sub>stat</sub> and MOR<sub>stat</sub>. In both directions (// and ⊥), highly significant relationships were observed. The predicted and the measured values of MOE<sub>stat</sub> and MOR<sub>stat</sub> 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<sup>®</sup> 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.https://www.mdpi.com/2076-3417/10/23/8712acetylationwood fiberstrengthstiffnessinternal bonding strengththickness swelling |
| spellingShingle | Sheikh Ali Ahmed Stergios Adamopoulos Junqiu Li Janka Kovacikova Prediction of Mechanical Performance of Acetylated MDF at Different Humid Conditions Applied Sciences acetylation wood fiber strength stiffness internal bonding strength thickness swelling |
| title | Prediction of Mechanical Performance of Acetylated MDF at Different Humid Conditions |
| title_full | Prediction of Mechanical Performance of Acetylated MDF at Different Humid Conditions |
| title_fullStr | Prediction of Mechanical Performance of Acetylated MDF at Different Humid Conditions |
| title_full_unstemmed | Prediction of Mechanical Performance of Acetylated MDF at Different Humid Conditions |
| title_short | Prediction of Mechanical Performance of Acetylated MDF at Different Humid Conditions |
| title_sort | prediction of mechanical performance of acetylated mdf at different humid conditions |
| topic | acetylation wood fiber strength stiffness internal bonding strength thickness swelling |
| url | https://www.mdpi.com/2076-3417/10/23/8712 |
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