scholarly journals KARAKTERISTIK SIFAT FISIKA DAN MEKANIKA KAYU LAMINA KOMBINASI JENIS KAYU SENGON (Paraserianthes falcataria (L.) Nilsen) DAN JENIS KAYU MERBAU (Intsia spp.)

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Kusno Yuli Widiati
Keyword(s):  
Modulus Of Elasticity ◽  
Mechanical Characteristics ◽  
Urea Formaldehyde ◽  
Class Ii ◽  
Modulus Of Rupture ◽  
Test Results ◽  
Paraserianthes Falcataria ◽  
Testing Method ◽  
Physical And Mechanical Characteristics ◽  
Adhesive Shear Strength

This study aims to determine the physical and mechanical characteristics of wood lamina combination of sengon wood and merbau with Melamine Urea Formaldehyde (MUF) adhesive. The testing method used is based on the DIN standard. The test results of the average lamina density of 0.58-0.73 g / cm3 at oven drying moisture content. Modulus of Elasticity (MoE), Modulus of Rupture (MoR) and value of compression parallel to grain highest found in the combination of merbau-sengon-merbau-sengon-merbau and the lowest in the combination of sengon-merbau-sengon. While the adhesive shear strength is the highest value in the combination treatment of merbau-merbau and the lowest in the combination of sengon-sengon. Based on the modulus of elasticity (MoE) of sengon treatment as face / back and merbau as core (3 and 5 layers) can be classified into strong class IV-V, merbau as face / back and sengon as core (3 and 5 layers) can be classified into strong class II-III. Modulus of Rupture (MoR) can be classified into strong class II-III and compression parallel to grain into strong class II.

scholarly journals KARAKTERISTIK SIFAT FISIKA DAN MEKANIKA KAYU LAMINA KOMBINASI JENIS KAYU SENGON (Paraserianthes falcataria (L.) Nilsen) DAN JENIS KAYU MERBAU (Intsia spp.)

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Kusno Yuli Widiati
Keyword(s):  
Modulus Of Elasticity ◽  
Mechanical Characteristics ◽  
Urea Formaldehyde ◽  
Class Ii ◽  
Modulus Of Rupture ◽  
Test Results ◽  
Paraserianthes Falcataria ◽  
Testing Method ◽  
Physical And Mechanical Characteristics ◽  
Adhesive Shear Strength

This study aims to determine the physical and mechanical characteristics of wood lamina combination of sengon wood and merbau with Melamine Urea Formaldehyde (MUF) adhesive. The testing method used is based on the DIN standard. The test results of the average lamina density of 0.58-0.73 g / cm3 at oven drying moisture content. Modulus of Elasticity (MoE), Modulus of Rupture (MoR) and value of compression parallel to grain highest found in the combination of merbau-sengon-merbau-sengon-merbau and the lowest in the combination of sengon-merbau-sengon. While the adhesive shear strength is the highest value in the combination treatment of merbau-merbau and the lowest in the combination of sengon-sengon. Based on the modulus of elasticity (MoE) of sengon treatment as face / back and merbau as core (3 and 5 layers) can be classified into strong class IV-V, merbau as face / back and sengon as core (3 and 5 layers) can be classified into strong class II-III. Modulus of Rupture (MoR) can be classified into strong class II-III and compression parallel to grain into strong class II.

Medium Density Particleboard with Addition of Impregnated Paper

2014 ◽  
Vol 1025-1026 ◽  
pp. 543-546
Author(s):  
Juliana Cortez Barbosa ◽  
Anderson Luiz da Silva Michelon ◽  
Elen Aparecida Martines Morales ◽  
Cristiane Inácio de Campos ◽  
André Luis Christoforo ◽  
...  
Keyword(s):  
Moisture Content ◽  
Modulus Of Elasticity ◽  
Mechanical Tests ◽  
Modulus Of Rupture ◽  
Medium Density ◽  
Test Results ◽  
Thickness Swelling ◽  
Adhesion Test ◽  
Layer Medium ◽  
Determine Moisture Content

The aim of this research was to produce three-layer Medium Density Particleboard (MDP), with the addition of impregnated paper, in the inner layer, in proportions of 1; 5 and 20%. In this study, MDP was composed with particles of small size in outer layers, and larger particles in internal layer. After panel manufacturing, physical and mechanical tests based on Brazilian Code ABNT NBR 14.810 were carried out to determine moisture content; density; thickness swelling; water absorption; modulus of rupture (MOR) and modulus of elasticity (MOE) in static bending and internal adhesion. Test results were compared to commercial panels, produced with 100% Eucalyptus, considering the requirements specified by Brazilian Code. Properties presented values close to normative specifications, indicating positively the possibility of production of MDP using addition of waste paper impregnated.

scholarly journals Mechanical Properties of Commercial Particleboard from Rubberwood (Hevea Brasiliensis) and Recycle Mix-Tropical Wood with Different Board Density

2021 ◽  
Vol 3 (1) ◽  
pp. 41-44
Author(s):  
Nur Wafa Amalina Amali ◽  
Nor Yuziah Mohd Yunus ◽  
Wan Mohd Nazri Wan Abdul Rahman
Keyword(s):  
Mechanical Properties ◽  
Modulus Of Elasticity ◽  
Hevea Brasiliensis ◽  
Urea Formaldehyde ◽  
Wood Particle ◽  
Modulus Of Rupture ◽  
Internal Bonding ◽  
Board Density ◽  
Tropical Wood ◽  
Minimum Requirements

In this study, mechanical properties of commercially manufactured hybrid particleboard from mix-tropical wood and rubberwood with four different densities at 25mm thickness have been investigated. The particleboard sample cutting and testing was in accordance to EN312:2013. The density of particleboard is identified with interval of 10kg/m3 for different densities which include 660kg/m3, 670kg/m3, 680kg/m3 and 690kg/m3. Particleboards were made with the ratio of 40:60 for mix-tropical wood particle and rubberwood particle respectively. The particleboards were prepared with urea formaldehyde (UF) with E1 formulation with addition of wax and hardener.  Increment of 10kg/m3 density for each particleboard led to increase in internal bonding (IB), bending testing include modulus of rupture (MOR) and modulus of elasticity (MOE), surface soundness (SS) and screw edge (SE) withdrawal. It was found that with board increment of 10kg/m3, the improvement was not statically significant except that for MOR. All panels met the minimum requirements of standard.

scholarly journals The Effect of Twisted Polymer Fiber on Physical and Mechanical Characteristics of Concrete C35

2018 ◽  
Vol 14 (1) ◽  
pp. 126-135
Author(s):  
Reza Mirzaei ◽  
Naser Zarifmoghaddam
Keyword(s):  
Tensile Strength ◽  
Reinforced Concrete ◽  
Modulus Of Elasticity ◽  
Mechanical Characteristics ◽  
Fiber Reinforced Concrete ◽  
Polymer Fiber ◽  
New Materials ◽  
Concrete Mix ◽  
Physical And Mechanical Characteristics

 Concrete as the most used material, is known as an integral part of construction. So far, many studies have been done in the field of improving the quality of concrete that most of them have examined change in concrete mix which is called concrete mix plan. However, the use of additives and also replacing commonly used materials in concrete with new materials always has been noteworthy. In this study, description of tests that have been done on fiber reinforced concrete will be discussed. Also, the condition of concrete mix plan will be discussed. Comparison between results of the tests showed that Forta reinforced concretes have more compressive, flexural and tensile strength and modulus of elasticity than normal and ordinary concretes.Journal of the Institute of Engineering, 2018, 14(1): 126-135 

scholarly journals Properties of Particleboard from Sawmill Wastes and Rubberwood (Hevea brasiliensis) with Different Board Thickness and Resin Content

2019 ◽  
Vol 8 (4) ◽  
pp. 6808-6812
Keyword(s):  
Mechanical Properties ◽  
Modulus Of Elasticity ◽  
Hevea Brasiliensis ◽  
Urea Formaldehyde ◽  
Resin Content ◽  
Modulus Of Rupture ◽  
Internal Bonding ◽  
Thickness Swelling ◽  
Board Thickness ◽  
European Standards

This study investigate the effect of the board thickness and resin content on the properties of particleboard. Single-layered sawmill wastes and rubberwood particleboards bonded with urea formaldehyde (UF) resins were manufactured. The boards were fabricated with three different board thicknesses (15, 18 and 25mm) at three different resin contents (7, 8 and 9%). The boards produced were evaluated for their modulus of elasticity (MOE), modulus of rupture (MOR), internal bonding (IB) and thickness swelling (TS) in accordance with the European Standards. Board thickness does affect the mechanical properties of particleboard. The study revealed that thinner boards gave higher MOE, MOR, IB and TS. No significant effects were found among three resin contents for MOE, MOR, IB and TS. It can be concluded that the particleboard made from mix tropical wood from sawmill waste and with rubberwood were suitable for particleboard manufacturing.

scholarly journals Pabrikasi Papan Komposit Berbahan Dasar Sabut Pinang (Areca catechu L.) dan Sabut Kelapa (Cocos nucifera L.)

PRISMA FISIKA ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 223
Author(s):  
Mentarie Resthu Putri ◽  
Irfana Diah Faryuni ◽  
Nurhasanah Nurhasanah
Keyword(s):  
Modulus Of Elasticity ◽  
Cocos Nucifera ◽  
Urea Formaldehyde ◽  
Modulus Of Rupture ◽  
Internal Bonding ◽  
Areca Catechu ◽  
Cocos Nucifera L

Pada penelitian ini telah dibuat papan komposit dengan bahan utama serat sabut pinang (Areca catechu L.) dan partikel sabut kelapa (Cocos nucifera L.). Bahan tambahan yang digunakan adalah urea formaldehyde (UF) sebagai matriks, parafin untuk penghambat air serta NH4Cl sebagai katalis. Papan komposit divariasikan sebanyak 3 sampel yaitu 100% serat sabut pinang, 100% partikel sabut kelapa dan 50% serat sabut pinang dicampur 50% partikel sabut kelapa. Papan komposit kemudian diuji sifat fisis dan mekanisnya dengan menggunakan standarisasi Japanese Industrial Standars (JIS) A 5908-2003. Hasil penelitian menunjukkan sampel yang terdiri dari 100% serat sabut pinang merupakan sampel yang paling baik yakni memiliki nilai kerapatan sebesar 616,82 kg/m3, kadar air sebesar 11,62%, daya serap air sebesar 182,87%, pengembangan tebal sebesar 59,65%, modulus of elasticity (MOE) sebesar 543,66 MPa, modulus of rupture (MOR) sebesar 9,24 MPa, dan internal bonding (IB)sebesar 0,05 MPa. Semua sampel dapat memenuhi standarisasi JIS A 5908-2003 untuk indikator uji kerapatan dan kadar air.Kata Kunci : komposit, sabut pinang, sabut kelapa

scholarly journals Kebergantungan Sifat Fisis dan Mekanis Papan Komposit Berbahan Dasar Sabut Pinang dan Sabut Kelapa pada Variasi Struktur

POSITRON ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 8
Author(s):  
Irfana Diah Faryuni ◽  
Mentarie Resthu Putri ◽  
Asifa Asri ◽  
Nurhasanah Nurhasanah
Keyword(s):  
Modulus Of Elasticity ◽  
Cocos Nucifera ◽  
Urea Formaldehyde ◽  
Modulus Of Rupture ◽  
Internal Bonding ◽  
Areca Catechu ◽  
Cocos Nucifera L

Pada penelitian ini, telah dibuat papan komposit dengan kandungan serat sabut pinang (Areca catechu L.) dan partikel sabut kelapa (Cocos nucifera L.) yang keduanya berperan sebagai filler. Selain itu, digunakan urea formaldehyde (UF) sebagai matriks, parafin untuk penghambat air, serta NH4Cl sebagai katalis. Struktur papan komposit divariasikan sebanyak 2 jenis, yaitu struktur homogen dan sandwich yang akan diuji sifat fisis dan mekanisnya dengan menggunakan standarisasi Japanese Industrial Standars (JIS) A 5908-2003. Struktur homogen terdiri dari 3 sampel, yaitu 100% serat sabut pinang, 100% partikel sabut kelapa, dan 50% serat sabut pinang dicampur 50% partikel sabut kelapa. Pada struktur sandwich terdapat 2 sampel, yaitu 25% serat sabut pinang sebagai face dan back serta 50% partikel sabut kelapa sebagai core dan 25% partikel sabut kelapa sebagai face dan back serta 50% serat sabut pinang sebagai core. Hasil penelitian menunjukkan sampel sandwich dengan susunan 25% serat sabut pinang sebagai face dan back serta 50% partikel sabut kelapa sebagai core, merupakan sampel yang paling baik yakni memiliki nilai kerapatan 641,36 + 18,03 kg/m3, kadar air 9,88 + 0,49 %, daya serap air 118,74 + 25,61 %, pengembangan tebal 48,82 + 8,44 %, modulus of elasticity 767,90 + 35,41 MPa, modulus of rupture  14,45 + 4,57 MPa, dan internal bonding 0,17 + 0,04 MPa. 

scholarly journals SIFAT PAPAN PARTIKEL DARI SERAT TANDAN KOSONG SAWIT DAN SERBUK KAYU DENGAN PEREKAT UREA FORMALDEHIDA (The Properties of Particle Board from Oil Palm Empty Fruit Bunches Fiber Sawdust with Urea Formaldehyde Resin)

2016 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Djoko Purwanto
Keyword(s):  
Bond Strength ◽  
Modulus Of Elasticity ◽  
Internal Bond ◽  
Urea Formaldehyde ◽  
Internal Bond Strength ◽  
Modulus Of Rupture ◽  
Particle Board ◽  
Palm Fiber ◽  
Empty Fruit Bunches ◽  
Screw Withdrawal

A palm oil mill with a capacity of hundred thousand tons of fresh fruit bunches per year will produce palm fiber waste about 12,000 tons. Recently, the use of palm empty fruit bunches (OPEFB) fiber is as fuel for electricity generation in the industry. Palm fiber waste contains lignocellulose materials as a feedstock to particle board manufacture. The aim of this research is to evaluate the properties of particle board from a mixture of OPEFB fiber and sawdust. The ratio of OPEFB fiber and sawdust are 100% : 0%; 75% : 25%; 50% : 50%; 25% : 75% and 0% : 100%, plus urea formaldehyde adhesive in a concentration of 11%. The boards were pressed using a clamp pressure of 16 kg/cm2 for 15 minutes at a temperature of 110 – 120 0C. The testing methods and standards of physical properties (moisture contents, thickness swelling, density) and mechanical (modulus of elasticity/MOE, modulus of rupture/MOR, screw withdrawal and internal bond strengths) refers to the SNI. 03 – 2105 - 2006. The results showed that the particle board made from 100% OPEFB fiber produces modulus of elasticity/MOE 1594.88 kg/cm2; modulus of rupture/MOR 18.08 kg/cm2; screw withdrawal 31.34 kg/cm2 and internal bond strength 0.86 kg/cm2. The addition of sawdust for 50% can improve modulus of elasticity/MOE, modulus of rupture/MOR and internal bond strength.

scholarly journals Dynamic model of closure the liner

2020 ◽  
pp. 114-122
Author(s):  
I. V. Dmytriv I. V.
Keyword(s):  
Cylindrical Shell ◽  
Modulus Of Elasticity ◽  
Mechanical Characteristics ◽  
Vacuum Pressure ◽  
Design Parameters ◽  
Radial Deformation ◽  
Central Angle ◽  
Radial Plane ◽  
Working Length ◽  
Physical And Mechanical Characteristics

Annotation Purpose. Develop analytical dependences for modeling the speed and dynamics of deformation of liner depending on its design parameters and physical and mechanical characteristics, taking into account the technological parameters of the process. Methods. Based on the system of geometric equilibrium equations for a cylindrical shell, taking into account the isotropy of the medium and the momentless stress state, the spatial action of forces and pre-tension of the liner, developed analytical equations that allow modeling the dynamics of deformation of liner in time, which allows to determine the time constant of the system “liner – milking cup”. Results. Analytical dependences of the dynamics of deformation of liner in time in the radial plane and the rate of deformation depending on its design parameters and physical and mechanical characteristics of the material are developed. Parameters for deformation simulation are: R – radius of liner, Е – modulus of elasticity, ρ – the density of the rubber material, h – thickness of liner, рн – vacuum pressure, l – the length of the active part of liner, ν – Poisson's coefficient for rubber, Fн – force of tension of liner. Depending on the central angle in the radial plane of the section, the shape of the deformation of the liner is modeled along its entire working length during the closing and opening stroke. Conclusions. The obtained dependences allow to model the dynamics of deformation of liner in the radial plane depending on its design parameters and physical and mechanical characteristics of the material. The developed analytical dependences take into account the pre-tension of the liner, vacuum pressure and allows modeling depending on the central angle in the radial plane of the rubber section. The use of the developed analytical dependences makes it possible to substantiate the main parameters that affect the process of closing and opening of the liner. The characteristic of the deformation in the cross section of the largest deformation is that the tension of the liner does not affect the deformation characteristic. This is due to the isotropy property of the cylindrical shell and the elastic isotropic properties. Keywords: liner, vacuum pressure, modulus of elasticity, radial deformation, coordinate system, tension of rubber, the cylindrical shell, the isotropic medium.

Bamboo hybrid laminate board (Gigantochloa apus) strip with falcata veneer (Paraserianthes falcataria) in selected fiber directions

BioResources ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. 9228-9242
Author(s):  
Ihak Sumardi ◽  
Rudi Dungani ◽  
Ignasia Maria Sulastiningsih ◽  
Deaul Aulia
Keyword(s):  
Mechanical Properties ◽  
Dimensional Stability ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Modulus Of Rupture ◽  
Core Material ◽  
Fiber Direction ◽  
Paraserianthes Falcataria ◽  
Low Dimensional ◽  
Hybrid Laminate

This study investigated the physical and mechanical properties of bamboo hybrid laminate boards (BHLB) in various fiber directions as a potential wood-replacement structural material. This study used dry bamboo (Gigantochloa apus) processed into thin strips with a thickness of 4 mm and falcata veneer (Paraserianthes falcataria). The BHLB were arranged based on different fiber directions (i.e., perpendicular and parallel) in cold pressing (30 min; 22.2 kgf/cm2) and hot pressing (6 min; 15 kg/cm2). The adhesive used was urea-formaldehyde (UF) resin (glue spread rate of 250 g/m2 and inter veneer 170 g/m2). Physical and mechanical properties were observed to validate the feasibility of preparing BHLB from bamboo strips and falcata veneers. The results showed that the arrangement of the fiber direction affects dimensional stability, MOE (modulus of elasticity), MOR (modulus of rupture), shear strength, and screw withdrawal strength. Falcata veneer as the board core material resulted in lower density, low dimensional stability, and higher water absorption. However, the mechanical properties were not much different and fulfilled the standard for structural use. This study concludes that bamboo can be used for making composite BHLB as an alternative to wood-based composites for structural use.

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