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INDONESIA
Jurnal Teknik Mesin
Published by Institut Teknologi Padang
ISSN : 20894880     EISSN : 25988263     DOI : -
Core Subject : Engineering,
Mechanical Engineering
Jurnal Teknik Mesin (JTM) is a journal aims to be a peer-reviewed platform and an authoritative source of information. We publish original research papers, review articles and case studies focused on mechanical engineering and other related topics. All papers are peer-reviewed by at least two referees. JTM is managed to be issued twice in every volume (April and October).
Arjuna Subject : -
Articles 6 Documents
 1 
Search results for , issue "Vol 7, No 2 (2017)" : 6 Documents clear
The Effect of TIG Welding for 304 and 304L Stainless Steel to Mechanical Properties , XRD and EDX Characterization as Pressure Vessel Materials Vuri Ayu Setyowati; Eriek Wahyu Restu Widodo
Jurnal Teknik Mesin (JTM) Vol 7, No 2 (2017)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

The aim of this paper is to analyze the effect of TIG welding for Austenitic Stainless Steel type 304 and 304L as pressure vessel materials. These materials have different carbon content. 304 SS and 304L SS of 6mm metal sheet were used as observed materials. The groove angel for welded specimens is 60o and TIG welding current is 100A. Current and voltage for welding process are set constant. For analyzing mechanical properties, tensile test was used to calculate the yield strength, tensile strength, and elongation. X-Ray Diffraction (XRD) and X-Ray Spectroscopy (EDX) test were used to analyze the phase and element compositions, respectively. The tensile strength of welded 304 SS was decrease to 425,64 MPa compared to 304 SS which is 466,67 MP to 422,22 MPa. The highest elongation of 22% among to welded 304L SS and it has good ductility. Based on, XRD measurements, all specimens have austenite peaks but 304L SS and welded 304L SS have δ-ferrite peaks. EDX measurement was also used to explain the element composition supporting mechanical properties.
Optimization of Injection molding Parameters using the Taguchi Method to Maximize Biocomposite Material Tensile Strength Sufiyanto Sufiyanto
Jurnal Teknik Mesin (JTM) Vol 7, No 2 (2017)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

This research explained a study for optimization of parameters process on the injection molding biocomposite material, which is a mixture of plastics and natural fibers. Natural fibers used is rice husk (RH) mixed with polypropylene (PP) and maleic anhydride polypropylene (MAPP). The biocomposite molded into tensile specimens ASTM D638-03 using the injection molding machine. The varied of injection molding is the parameters process, that are divided into 4 parameters and each consists of 3 levels, then be done tensile tests on specimens. Optimization performed using the Taguchi method with orthogonal matrix design L27(313). The maximum tensile strength of biocomposite were barrel temperature of 210°C, injection pressure of 55 bar, holding pressure of 40 bar, and injection velocity of 75 mm/sec
Experimental Study of Vibration of Shaft-Rotor System Due to Imbalance Asmara Yanto; Rozi Saferi
Jurnal Teknik Mesin (JTM) Vol 7, No 2 (2017)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

In this study, vibration of shaft-rotor system as a part of rotating machinery prototype due to imbalance has been monitored, processed and analyzed by a dynamic signal analyzer virtual instrument (DSA VI). The rotating machinery prototype consists of an AC induction motor, a pulley-belt system, and a shaft-rotor system supported by two bearings. Two discs were placed between two bearing housings. On both discs are added and placed additional mass as unbalance mass on shaft-rotor system. Unbalance mass placement is varied with different of angle orientations i.e. 0o, 30o, 60o, 90o, 120o, 150o and 180o between on both discs. DSA VI consists of four micro-electro-mechanical system (MEMS)-based accelerometers type ADXL335 that placed on the bearing housings, a data acquisition device and a data analyzer device. The four accelerometers serve to convert the mechanical quantities of measured vibration acceleration into electrical quantities in mV. Vibration signal in mV is acquired by the data acquisition device. Data sampling rate is set at control panel of the data analyzer device. Measurable vibrations in the time domain are displayed by the data analyzer device in a computer. Vibration in time domain is transformed into frequency domain by using fast fourier transfrom (FFT) method. From this experimental study of vibration of shaft-rotor system due to imbalance obtained the highest vibration amplitude for unbalance mass placement with different of angle orientation is 30o between on both discs. If unbalance mass placement with different of angle orientation is greater than 30° between on both discs, then amplitude of vibration due to imbalance will decreases.
Corrosion Resistance Test Using Gravimetric Method on Fuel Tanks of Ethanol Fuel Vehicles Muji Setiyo; Saifudin Saifudin; Abdul Wahid Jamin; Rifqi Nugroho; Muhammad Rizal Ibrahim
Jurnal Teknik Mesin (JTM) Vol 7, No 2 (2017)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

In the next few decades, ethanol will take on the role of replacing fossil fuels. However, for direct application to the existing vehicles, an assessment of the corrosion resistance of the fuel tank is required. Therefore, this paper presents the results of corrosion resistance investigation of fuel tanks due to the application of ethanol. A Gravimetric method is used to test the corrosion. Ethanol is mixed with NaCl at various percentages as a corrosive medium. The test results show that the fuel tank has good resistance to corrosion due to ethanol use. 
A Study on The Crack Behavior of Baggase-Polyester Composites Rozi Saferi; Asmara Yanto
Jurnal Teknik Mesin (JTM) Vol 7, No 2 (2017)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

The development of composite technology has begun to change nowadays, from composite fiber-synthesized to composite natural fiber fabrics. Natural baggase fiber has the opportunity to be developed as a strengthening medium in polymer resins. The purpose of this study were to know the effect of fiber orientation to maximum critical load for different initial crack lengths, to know elastic energy of composite material having fiber orientation varied at the time of loading and to know the effect of fiber orientation on fracture toughness for composite material. In this paper, it’s used 1.5mm diameter sugarcane fibers and the polyester matrix. The fraction volume of fiber and resin used is 5%: 95%. Fiber is given 20% NaOH treatment. Then the fiber is arranged with orientation 0/90º and 0/45º. While the bending test specimen is in accordance with ASTM-D5045 standard, the size of the specimen dimension is 125 mm long, 30 mm wide and 10 mm thick; with crack variations are 7mm, 9mm, 11mm, 13mm, and 15mm. It’s could be concluded that the critical load will decrease as the initial crack length increases. Composite material with 0/90º fiber orientation has elastic energy greater than composite with 45º fiber orientation. And crack propagation rate in composite material with fiber orientation 0/90º is faster than composite with 0/45º orientation.
Experiment and Analysis Briquette Cob Upon Which Burn Producer of Vapour Eswanto Eswanto; Barita Siregar; Ricad P. Girsang
Jurnal Teknik Mesin (JTM) Vol 7, No 2 (2017)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

In Indonesia Corn is one of the second type of food crop, this condition based on physical characteristics and corn chemical has potential as a source of biomass energy. Corncob biomass waste can be made into corncob briquettes to produce environmentally friendly alternative energy, where the utilization of biomass as energy is done by combustion in the combustion chamber, which in this case is stoker. The purpose of this research is to know the characteristics and efficiency of burning corncobs and corncob briquettes as steam-producing biomass fuels. The experimental method was experiment with combustion of corncob briquettes with 10%, 20%, 30% adhesive variation on stocker combustion chamber using air supply 0,00144 m3 / s, air excess 10% (0,00158 m3 / s), and excess Air 20% (0,00173 m3/s) with valve angle 15º, 17º, 18º, and feeding fuel 0,1 kg, 0,15 k, 0,2 kg, fuel is put into continuous combustion chamber using conveyor. The calorific value of 10% tuna corncob briquettes HHV= 8578,38 kJ/kg, LHV= 5338.38 kJ/kg, 20% adhesive HHV= 6127,41 kJ/kg, LHV= 2887,43 kJ/kg, adhesive 30% HHV= 6127,41 kJ/kg, LHV: 2887,43 kJ/kg using a calorimeter boom analysis. Temperature generated on burning 10cm tuna corncob briquettes reach 906 ºC and at the lowest temperature of 284 ºC, 20% adhesive reaches 901 ºC and at the lowest temperature of 225 ºC, 30% adhesives reach 829 oC and at the lowest temperature of 250 ºC. Efficiency of combustion chamber of briquettes 10% cobber cornet briquettes are η: 69%, adhesive 20% η = 66%, adhesive 30% η = 67%. From the results of this type of corn tuna briquette fuel with adhesive variation, fuel on 10% adhesive produces the highest temperature and efficiency.

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