scholarly journals KARAKTERISTIK TALI AGEL BERKITOSAN SEBAGAI BAHAN ALAT PENANGKAPAN IKAN

2019 ◽  
Vol 10 (2) ◽  
pp. 177-186
Author(s):  
Didin Komarudin ◽  
Mulyono Baskoro ◽  
Diniah Diniah ◽  
Bambang Murdiyanto ◽  
Pipih Suptijah
Keyword(s):  
Mechanical Properties ◽  
Breaking Strength ◽  
Physical And Mechanical Properties ◽  
Forest Products ◽  
Synthetic Fiber ◽  
Fishing Gear ◽  
Fisheries Resources ◽  
Product Engineering ◽  
Engineering Department ◽  
Gear Technology

Agel ropes have lower mechanical properties (breaking strength and elongation) than synthetic fiber ropes. Chitosan coating is expected to improve the mechanical properties of agel ropes. The aims of this study are to investigate the effect of immersion in chitosan on the physical and mechanical properties of agel ropes, and to examine the breaking strength and elongation of coated agel ropes after being soaked in both freshwater and seawater. This experimental study was conducted at the Laboratory of Fishing Gear Technology, Department of Fisheries Resources Utilization IPB University, and Laboratory of Forest Product Engineering, Department of Forest Products IPB University. The experiment involved 3 mm in diameter of two agel ropes incorporating control rope and agel rope soaked in 1% chitosan for 24 hours. The control rope was light brown, stiff, and rough, while the treated rope was darker, less stiff, and smoother. The breaking strength of control and treated rope was significantly different (P<0.05), which in respect constitute 15.06 kgf and 24.54 kgf. The elongation of both ropes were also significantly different (P<0.05), making 10,56% for control and 18,04% for treated rope. Breaking strength of the agel rope decreased by 50% after being immersed for 28 days. Keywords: agel rope, chitosan, breaking strength, elongation

Application of Oil Palm Empty Fruit Bunch Fiber to Improve the Physical and Mechanical Properties of Composite Railway Brake Block Materials

2013 ◽  
Vol 651 ◽  
pp. 486-491 ◽  
Author(s):  
Triono Agus ◽  
Wiratmaja Puja Ign ◽  
Hilman Syaeful Alam ◽  
S. Rochim
Keyword(s):  
Mechanical Properties ◽  
Oil Palm ◽  
Natural Fiber ◽  
Physical And Mechanical Properties ◽  
Synthetic Fiber ◽  
Technical Requirement ◽  
Commercial Sample ◽  
Environment Friendly ◽  
Synthetic Fibers ◽  
Brake Block

One of the natural fiber considered to replace syntetic fiber is Oil Palm Empty Fruit Bunches (OPEFB) fiber which offer advantages such as environment friendly and widely available especially in indonesia . This study investigates the characteristics of railway brake block with OPEFB fibres compare to synthetic fiber. All the test results were compared to the technical requirement of PT. Kereta Api Indonesia (PT. KAI ) and evaluated using Extension Evaluation Method (EEM) to select and get the best sample. From the evaluation results using EEM, one of non commercial sample using OPEFB fiber give a better results compare to commercial sample using synthetic fibers. So it can be concluded that OPEFB fiber as reinforcement for railway brake material could improve physical and mechanical properties of the material, environment friendly and could replace synthetic fibers.

scholarly journals Substantiationofrules ofsimilarityofbreakingloadoftwistedfishinggear

2020 ◽  
Vol 0 (1) ◽  
pp. 38-45
Author(s):  
Alexander Alekseevich Nedostup ◽  
Pavel Nasenkov ◽  
Alexey Olegovich Razhev ◽  
Karina Konovalova ◽  
Sergey Fedorov
Keyword(s):  
Mechanical Properties ◽  
Large Scale ◽  
Large Diameter ◽  
Experimental Studies ◽  
Physical And Mechanical Properties ◽  
Breaking Load ◽  
Full Scale ◽  
Fishing Gear ◽  
Scale Modeling ◽  
Polyamide Fibers

The article focuses on the problem of physical modeling of the physical and mechanical properties of fishing twisted filamentary materials, in particular, the most important one – the breaking load. The problems arise because of conducting full-scale experiments, particularly when the ropes of large diameter are used to build the rope parts of fishing gear. The solution to the problem of determining the breaking load on filamentary parts can be found by using specialized tensile testing machines and modern software, which is an effective tool for predicting the reliability and a resource of a gear part operating in difficult conditions of dynamic and shock loads. However, de-signing of fishing gear must begin with large-scale modeling, which will help to correctly calculate the physical and mechanical properties of the designed object using the well-known parameters of the full-scale material. The similarity rules of breaking load of fishing twisted filamentary gear used for the construction of industrial fishing tools will make it possible to model new elements of these tools without conducting full-scale experiments. At the same time, they will already contain solutions to problems associated with studying the dynamic processes, deformation, fracture, as well as the prediction of reliability and resource of the material. The technique proposed based on determining the scale of similarity of filamentary gear made of polyamide fibers, will help to simu-late various net and rope elements from filaments gear of various sizes and structures, instead of conducting energy-intensive experimental studies on ropes of large diameter.

scholarly journals A Comparative Study between Physical Properties of Compact and Ring Yarn Fabrics Produced from Medium and Coarser Yarn Counts

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Ghada Ali Abou-Nassif
Keyword(s):  
Mechanical Properties ◽  
Physical Properties ◽  
Breaking Strength ◽  
Physical And Mechanical Properties ◽  
Air Permeability ◽  
Woven Fabrics ◽  
Ring Yarn ◽  
Spun Yarns ◽  
Compact Spinning ◽  
Tearing Strength

In compact spinning, fibers in drawing stage are condensed using air suction, which results in the produced yarns which significantly differ from ring spun yarns in their physical and mechanical properties. This study compares between physical properties of compact and ring yarn fabrics woven from coarser and medium yarn counts. The experimental results were statistically analyzed using ANOVA. The findings of this study revealed that woven fabrics produced from compact spun yarns are superior to those produced from ring spun yarns with respect to breaking strength, breaking elongation, abrasion resistance, tearing strength, and air permeability.

The effects of macro synthetic fiber reinforcement use on physical and mechanical properties of concrete

2014 ◽  
Vol 61 ◽  
pp. 191-198 ◽  
Author(s):  
Hakan Bolat ◽  
Osman Şimşek ◽  
Mustafa Çullu ◽  
Gökhan Durmuş ◽  
Ömer Can
Keyword(s):  
Mechanical Properties ◽  
Fiber Reinforcement ◽  
Physical And Mechanical Properties ◽  
Synthetic Fiber

scholarly journals Stabilisasi Tanah Ekspansive dengan Menggunakan Tanah Putih untuk Tanah Dasar di Daerah Godong Kabupaten Grobogan Jawa Tengah

2018 ◽  
Vol 24 (1) ◽  
pp. 1 ◽  
Author(s):  
Sri Prabandiyani Retno Wardani ◽  
Muhrozi Muhrozi ◽  
Andi Retno Ari Setiaji ◽  
Danny R Riwu
Keyword(s):  
Mechanical Properties ◽  
Expansive Soils ◽  
Soil Mechanics ◽  
Chemical Constituents ◽  
Expansive Soil ◽  
Physical And Mechanical Properties ◽  
Dry Weight ◽  
Central Java ◽  
Soil Cement ◽  
Engineering Department

Problematic soils such as expansive soils are common in Indonesia. There are several methods to overcome the damage caused by expansive soil, such as by mixing the soil with additives. Some researchers have conducted research by mixing additives into expansive soil (cement, lime, fly ash etc), which work to increase soil strength and reduce swelling. Considering that the people in Buraen Village of Kabupaten Kupang use white soil as a substitute for cement, where the white soil has chemical constituents almost the same as those owned by cement, and contain CaO as it has lime, it is necessary to do research to determine the effect of white soil on physical and mechanical properties of expansive soil, so it can be used as an additive. This research was conducted at Soil Mechanics Laboratory, Civil Engineering Department, Engineering Faculty, Diponegoro University, Semarang.with soil sample from Godong, Central Java and white soil in Buraen Village of Kupang Regency, which purpose to find out the change of physical and mechanical properties of expansive soil that have been given some variation of mixture of white soil  to the dry weight of the soil, with optimum moisture content from standard Proctor test results. The results of this study indicate that white soil can be used as an additive and the use of OMC for mixing is the OMC of expansive soil.

scholarly journals PENGARUH WAKTU PERENDAMAN DALAM AIR, KADAR PATI DAN KADAR LIGNIN TERHADAP SIFAT FISIK DAN MEKANIK BAMBU AMPEL (Bambusa vulgaris Schard)

2018 ◽  
Vol 7 (1) ◽  
pp. 39
Author(s):  
Abdurachman Abdurachman ◽  
Agus Ismanto
Keyword(s):  
Mechanical Properties ◽  
Moisture Content ◽  
Immersion Time ◽  
Lignin Content ◽  
Starch Content ◽  
Physical And Mechanical Properties ◽  
Forest Products ◽  
Modulus Of Rupture ◽  
Running Water ◽  
Bambusa Vulgaris

The effect of immersion time in the water, starch and lignin content physical and mechanical properties of Ampel bamboo (Bambusa vulgaris Schard)The studied effect of immersion time in the water on physical and mechanical properties of ampel bamboo had been studied  at the Forest Products Research and Development Center Bogor. Round Bamboo of ampel species (Bambusa vulgaris Schard) a length of 50 cm was immersed in running water, stagnant and in the sludge for 7, 14, 21 and 28 days. Then the changes in starch and lignin content, physical and mechanical properties were evaluated. The physical properties studied were evaluated density and moisture content, while mechanical properties were bending and parallel tensile strength of fiber. The results showed that the media and immersion time significantly affect the density and moisture content, but did not affect the physical and mechanical properties. Increased starch content in a variety of treatments, especially on immersion in water, otherwise the lignin content decreases, causing a decrease in the nature of Modulus of Elasticity (MOE) and Modulus of Rupture (MOR). Immersion in stagnant water better than by soaking in the mud and in running water.Keywords: Bambusa vulgaris Schard,  media, immersion time, physical and mechanical properties ABSTRAKPenelitian pengaruh waktu perendaman dalam air terhadap sifat fisik dan mekanik bambu ampel (bambusa vulgaris) telah dilakukan di Pusat Penelitian dan Pengembangan Hasil Hutan Bogor. Bambu bulat berukuran panjang 50 cm direndam dalam air mengalir, tergenang dan lumpur selama 7, 14, 21 dan 28 hari, kemudian diamati perubahan kadar pati,diuji sifat fisik dan mekaniknya. Sifat fisik yang diteliti adalah kerapatan dan kadar air, sedangkan sifat mekanik adalah keteguhan lentur dan tarik sejajar serat. Hasil penelitian menunjukkan bahwa media dan waktu rendaman berpengaruh nyata terhadap kerapatan dan kadar air, tetapi tidak berpengaruh terhadap sifat fisis dan mekanis bambu yang diteliti. Kadar pati meningkat pada berbagai perlakuan terutama pada rendaman dalam air mengalir, sebaliknya kandungan lignin menurun sehingga menyebabkan penurunan sifat Modulus elastisitas (MOE) dan keteguhan lentur maksimum (MOR). Perendaman dalam air tergenang lebih baik dibandingkan dengan cara perendaman dalam lumpur maupun dalam air mengalir.Kata kunci : Bambusa vulgaris Schard, media, waktu perendaman, sifat fisis dan mekanis

PEMANFAATAN KAYU AKASIA MANGIUM (Acacia mangium Willd) UNTUK MEBEL

2012 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Djoko Purwanto
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical Properties ◽  
Treatment Process ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Wood Fibers ◽  
Test Parameters ◽  
Mechanical And Physical Properties ◽  
Scale Scores

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

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