Modulus of Elasticity in Static Bending for Oriented Strand Board (OSB)

In this paper, the bamboo-poplar composite oriented strand board (OSB) with different hybrid ratios were aged under the standard of ASTM D1037 to evaluate its weathering performances. The thickness swelling (TS), water absorption, modulus of rapture in perpendicular direction (MOR⊥), modulus of elasticity in perpendicular direction (MOE⊥) and internal bonding (IB) of specimens were tested. The results showed that the reduction rate of TS ranged from 21% to 69%, which increased with the poplar ratio increasing; the growth multiple of 24h water absorption of bamboo-poplar composite OSB were at the similar level, the values of which were much smaller than that of the pure bamboo or poplar OSB; the maximum and minimum retention rate of MOR⊥ and MOE⊥ belonged to pure bamboo and poplar OSB respectively, retention rate of MOR⊥ of the bamboo-poplar composite OSB rose with the increment of poplar ratio, while retention rate of MOE⊥ and IB of bamboo-poplar composite OSB were similar and the hybrid ratio 2.5:7.5(bamboo: poplar) obtained the maximum IB retention rate of 16%. Through detailed comparison, the bamboo-poplar composite OSB with the hybrid ratio 2.5:7.5 performed the best after aging.

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PENGARUH KOMPOSISI FACE-CORE TERHADAP SIFAT FISIK DAN MEKANIS ORIENTED STRAND BOARD DARI BAMBU DAN ECENG GONDOK

PERENNIAL ◽

10.24259/perennial.v8i2.218 ◽

2012 ◽

Vol 8 (2) ◽

pp. 75

Author(s):

Sahriyanti Saad ◽

. Hilal

Keyword(s):

Mechanical Properties ◽

Bond Strength ◽

Dimensional Stability ◽

Modulus Of Elasticity ◽

Water Hyacinth ◽

Internal Bond ◽

Oriented Strand Board ◽

Core Layer ◽

Dry Weight ◽

Modulus Of Rupture

The effect of particle composition made of bamboo and water hyacinth on the dimensional stability and mechanical properties of resulted oriented strand boards (OSB) were investigated. Three layered boards were made from bamboo and water hyacinth in which bamboo strand was used as face/back layer and water hyacinth strand was used as core layer. The boards were manufactured using three levels of bamboo and water hyacinth compositions (50:50, 60:40 and 70:30) with 6 % isocyanate based on the strand oven dry weight. The results showed that dimensional stability of the OSB decreased with the increase of composition of water hyacinth strand on core layer. A higher composition of bamboo strand as face/back layer compared to water hyacinth strand resulted in increased modulus of elasticity and internal bond strength, but decreased the modulus of rupture. The bamboo and water hyacinth composition of 70:30 compositions showed better properties than other compositions. Key words: Bamboo, water hyacinth, composition, OSB

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Characterization of Engineering Elastic Parameters of Oriented Strand Board (OSB) Manufactured from Poplar (Populus deltoides) Strands Using Ultrasonic Contact Pulse Transmission

Drvna industrija ◽

10.5552/drvind.2020.1908 ◽

2020 ◽

Vol 71 (3) ◽

pp. 227-234

Author(s):

Meysam Zahedi ◽

Saeed Kazemi Najafi ◽

Josef Füssl ◽

Majid Elyasi

Keyword(s):

Shear Modulus ◽

Elastic Wave ◽

Elastic Constants ◽

Modulus Of Elasticity ◽

Populus Deltoides ◽

Oriented Strand Board ◽

Elastic Wave Velocity ◽

Elastic Parameters ◽

Pulse Transmission

When using wood and wood-based composites, it is necessary to determine the elastic constants of these engineered materials. Oriented strand board (OSB), as structural wood based panel, plays a significant role in the building sector, but the accessibility of such elastic constants of OSB is mostly limited. For this purpose, this study aimed at determining the elastic wave velocity, stiffness and all elastic constants of OSB made from Poplar (Populus deltoides) strands using ultrasonic through–transmission technique. Laboratory OSBs with the mean density of 760 kg/m3 were made with the average strand sizes of 0.6 mm in thickness, 120 mm in length and 30 mm in width. 8 % phenol-formaldehyde (PF) resin was used with the pressing conditions of 3.43 N/mm2, 190 °C and 600 s as pressure, temperature and time of pressing, respectively. The OSBs were assumed as an orthotropic model. Three modulus of elasticity (E1, E2, and E3), three shear modulus (G12, G13 and G23), and six Poisson’s ratios (v12, v21, v13, v31, v23, v32) were calculated by longitudinal, transversal and quasi-transversal waves velocities. Ultrasonically determined stiffness coefficients of OSB were investigated by representative volume elements (RVE). Therefore, the separation of scales requirement is satisfied, and the measured velocities can be applied to determine the engineering elastic parameters of the examined OSB. The results indicate that modulus of elasticity and shear modulus are in the same order of magnitude in comparison with other references, and the values of Poisson’s ratios are valid in ultrasonic range measurement. In conclusion, the ultrasonic contact pulse transmission shows great potential to determine the characterization of elastic wave velocity, stiffness and engineering elastic parameters.

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The Flakes Alignment Efficiency and Orthotropic Properties of Oriented Strand Board

Holzforschung ◽

10.1515/hf.2001.016 ◽

2001 ◽

Vol 55 (1) ◽

pp. 97-103 ◽

Cited By ~ 1

Author(s):

S.Y. Wang ◽

B.J. Chen

Keyword(s):

Ultrasonic Velocity ◽

Modulus Of Elasticity ◽

Oriented Strand Board ◽

Japanese Cedar ◽

Bottom Layer ◽

Modulus Of Rupture ◽

Mechanical Alignment ◽

The Face ◽

Length Direction ◽

Orthotropic Properties

Summary This study was designed to investigate the efficiency of flake's alignment and orthotropic properties of oriented strand board (OSB) by using ultrasonic wave method. It was designed also to discuss the correlation among ultrasonic velocity (V), dynamic modulus of elasticity (Ed), modulus of elasticity in bending (MOE) and modulus of rupture (MOR). Results are summarized as follows: The flake's aligned angle (θ): the angles between flake length direction and mechanical alignment direction on the face layer of OSB within 0°–30° were 93–97% for JSP(OSB made from 100% of Japanese cedar flakes), JMP(OSB made from 50% of Japanese cedar flakes and 50% of Taiwan paulownia flakes) and CMP(OSB made from 50% of China fir flakes and 50% of Taiwan paulownia flakes) groups OSB, and on the bottom layer, 76–85% for these three groups OSB, respectively. The ultrasonic velocity (V) at 0° of angle between flake's length direction and mechanical alignment direction (V0) was the highest, decreasing rapidly with increase of aligned angle (θ). The lowest value of ultrasonic velocity occurred at 90° of angle between flake's length direction and mechanical alignment direction (V90) and the relationship between θ and V could be represented by Hankinson's formula, and Jacoby equation. The orthotropic properties of OSB, defined as the ratio of V0/V90 were 2.4–3.2 for the full piece specimens, and 2.4–2.6 for the bending tested specimens. Interrelationships between V, Ed, MOR and MOE were positive linear regression formulas.

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Accounting for the Frequency-Dependent Dynamic Modulus of Elasticity of Duralumin in Deformation Problems

Прикладная механика и техническая физика ◽

10.15372/pmtf20170317 ◽

2017 ◽

Keyword(s):

Modulus Of Elasticity ◽

Dynamic Modulus ◽

Frequency Dependent ◽

Dynamic Modulus Of Elasticity

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Pengaruh Tekanan dan Penggunaan Conplast terhadap Sifat Mekanik Eternit dari Abu Cangkang Sawit

Jurnal Riset Teknologi Industri ◽

10.26578/jrti.v8i15.1552 ◽

2016 ◽

Vol 8 (15) ◽

pp. 47-54

Author(s):

Haspiadi Haspiadi

Keyword(s):

Mechanical Properties ◽

Oil Palm ◽

Modulus Of Elasticity ◽

Modulus Of Rupture ◽

Palm Shell ◽

Oil Palm Shell ◽

Density Values ◽

Test Result

The purpose of this research is to know the influence of pressure and use of conplast against mechanical properties which are a Modulus of Elasticity (MOE) and Modulus of Rupture (MOR) of plasterboard. The study is done because still low quality of plasterboard made from a mixture of ashes of oil-palm shell especially of the mechanical properties compared to the controls. The method of this reserach used variation of printed pressure and the addition of conplast. Test result is obtained that the highest value of Modulus of Elasticity (MOE) 90875.94 Kg/cm2, Modulus of Rupture (MOR) 61.16 Kg/cm2 and density values in generally good printed at the pressure 60 g/cm3 and the addition of conplast 25% as well as the composition of the ash of palm shell oil 40%: limestone 40%: cement 15%: fiber 5% and 300 mL of water. ABSTRAK Tujuan dari penelitian ini adalah untuk mengetahui pengaruh tekanan dan penggunaan conplast terhadap sifat mekanik yaitu kuat lentur dan keteguhan patah eternit berbahan dasar abu cangkang sawit. Penelitian ini dilakukan karena masi rendahnya mutu eternit berbahan campuran abu cangkang sawit dari bolier khususnya sifat mekanik dibandingkan dengan kontrol. Metode penelitian yang digunakan adalah dengan variasi tekanan cetak dan penambahan conplast. Hasil uji diperoleh bahwa kuat lentur tertinggi sebesar 90875,94 Kg/cm2 dan keteguhan patah sebesar 61,16 Kg/cm2, yang dicetak pada tekanan 60 g/cm3 dan penambahan conplast 25% dengan komposisi abu cangkang sawit 40 %: kapur 40 % : semen 15 %: serat 5 % dan air 300 mL.Kata Kunci : Abu cangkang sawit, conplast, kuat lentur, keteguhan patah.

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ISO-ELASTIC

Alloy Digest ◽

10.31399/asm.ad.fe0014 ◽

1957 ◽

Vol 6 (8) ◽

Keyword(s):

Corrosion Resistance ◽

Low Temperature ◽

Physical Properties ◽

Tensile Properties ◽

Temperature Coefficient ◽

Nickel Alloy ◽

Modulus Of Elasticity ◽

Heat Treating ◽

Precision Instrument ◽

Iron Nickel

Abstract ISO-ELASTIC is an iron-nickel alloy having low temperature coefficient of the modulus of elasticity. It is suitable for precision instrument springs. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and machining. Filing Code: Fe-14. Producer or source: John Chatillon & Sons.

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WIELAND DURO TUNGSTEN

Alloy Digest ◽

10.31399/asm.ad.w34 ◽

2020 ◽

Vol 69 (10) ◽

Keyword(s):

Melting Point ◽

Physical Properties ◽

Tensile Properties ◽

Modulus Of Elasticity ◽

Radiation Shielding ◽

High Melting ◽

High Modulus ◽

High Melting Point ◽

Structural Applications ◽

Very High

Abstract Wieland Duro Tungsten is unalloyed tungsten produced from pressed-and-sintered billets. The high melting point of tungsten makes it an obvious choice for structural applications exposed to very high temperatures. Tungsten is used at lower temperatures for applications that can benefit from its high density, high modulus of elasticity, or radiation shielding capability. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on machining. Filing Code: W-34. Producer or source: Wieland Duro GmbH.

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