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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 158 Documents
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Influence of Drying Duration of Paving Block with the 5% Fly Ash Addition on Compressive Strength (Water Binder) Nurzal Nurzal; Taufik Taufik
Jurnal Teknik Mesin (JTM) Vol 6, No 1 (2016)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

This study was conducted to determine the effect of variations in drying time with the addition of 5% by weight of fly ash in the manufacture of paving blocks through compressive strength testing. Fly ash is derived from the combustion of coal in a steam power plant of Sijantang Sawahlunto. The increase of production of fly ash causing negative impacts on the environment, so that one of the solutions to overcome such effects is by utilizing fly ash to mix and improve the quality of the paving block (concrete blocks). The composition used to make paving block that is 100% of paving blocks (cement + sand + water) and 95% of paving blocks (cement + sand + water) plus 5% fly ash with variation drying 7, 14, 21, 28 and 35 days. The result showed paving block with 5% by weight of the composition of the fly ash has a higher compressive strength than 0% by weight of fly ash. Optimal conditions obtained on the composition 5% by weight of fly ash and drying time of 35 days. Average - average compressive strength of 23.1 MPa SNI 03-0691-1996 can be classified according to quality and to the parking lot. All the test results are included in SNI, except on drying 7 days with 0% by weight of the composition of the fly ash.­
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.
Modeling and Simulation of a Rotary Quadruple Pendulum System Using Scientific Python Stacks and Modelica Language Adriyan Adriyan
Jurnal Teknik Mesin (JTM) Vol 7, No 1 (2017)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

This paper presented the modeling and simulation of a rotary quadruple pendulum (RQP) system using two open source software, i.e: scientific python stacks (SciPy stacks) and Modelica language via Anaconda python distribution and OpenModelica, respectively. The modeling stage using SymPy (a package of SciPy stacks) was conducted to obtain the governing equation in full symbolic form by applying Lagrange’s method. The listing code is also provided to test by the user later on. Meanwhile, both modeling and simulation were performed in Modelica language by addressing several conditions concerning the initial conditions of the system, i.e: examining up-up-up-up, up-up-down-down, and up-down-up-down conditions. Simulation required the numerical values of the RQP system be supplied before running the simulation. In conclusion, the derivation of the governing equation using SymPy can be done in a matter of minutes without having a mistake when doing the algebraic manipulation. Simulation using OpenModelica was present the response of the RQP system in three conditions that considered initial conditions imposed to the system. The model obtained through this research can be used a baseline for developing a control scheme for the RQP system in its inverted position.
Improved Performance Cooling System with Integrated Condenser and Direct Evaporator Cooling Arfidian Rachman
Jurnal Teknik Mesin (JTM) Vol 9, No 1 (2019)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

For areas with very hot and humid weather conditions increased latent and sensible loads are a major problem in cooling systems that will increase compressor work so that electricity consumption will also increase. Combined Condenser with direct evaporative cooling will increase the heat removal process by using an evaporative cooler effect that will increase the efficiency of energy use. This paper presents the study of the use of evaporative cooling and condenser. This paper mainly calculated energy consumption in steam compression cooling systems and related problems. From the results of this study, the use of condensers with evaporative cooling, power consumption can be reduced to 46% and performance of coefficient (COP) can be increased by about 12%, with 1,2 kW cooling capacity.
Reverse Engineering of a Hydro Turbine System Mechanical Parts Nofirman Firdaus
Jurnal Teknik Mesin (JTM) Vol 6, No 2 (2016)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

This paper presents a reverse engineering process for mechanical parts of a hydro turbine system. The parts under reverse engineering (RE) are faceplates and bushings. A glance of reverse engineering process is also presented based on the case study. The key to reverse engineering process is determining the key properties of material. Based on the analysis, there are several material properties that would be used for the comparison with the original equipment.The comparison of the final products with the original components shows that faceplates and bushings manufactured from reverse engineering are equivalent to the original components.
Effect of Oil on the Electrodes of the Low-Carbon Steel Welding Using DCSP Polarity in Terms of Microstructure Hafni Hafni; Karnova Yanel
Jurnal Teknik Mesin (JTM) Vol 8, No 1 (2018)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

The flaws or failures that occur in the welding results can be caused by many things, one caused by the quality of the electrode. The quality of the electrode may be affected by moisture caused by water or oil, thereby damaging the flux lining the electrode. To know how big influence of oil on electrode to result of welding of low carbon steel hence conducted a research by using oil as element of elektrodanya moisturizer. The humidity of the electrode is carried out by immersing the electrodes into the SAE 40 oil oil until it reaches the absorption of 5% by weight of the electrode. Welding process is then performed on low carbon steel plate with DCSP polarity.The result of welding is metallographic testing to observe macrostructure and microstructure of welding area and base metal. From the test results obtained that the moisture of electrodes by oil cause defects in the weld metal region on the low carbon steel welding results.
The characteristics of Coconut Fiber-Based Composites and Sugar Fiber-Based Composites Asfarizal Saad
Jurnal Teknik Mesin (JTM) Vol 6, No 1 (2016)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

Composites made from natural plant fibers that are environmentally friendly is now more attractive, lighter weight, the number of abundant, renewable, competitive prices has encouraged the use of a broad field of engineering, building interiors and clothing. The characteristics of each fiber is highly variable and influenced by the maturity of fiber materials, processing into fiber, perlakauan after so fibers and fiber treatment. Known properties of fiber can help choose the method that is right and good to be applied in the manufacturing process of composite. Pretreatment, composition and matrix settings, select the type of adhesive is a method that is widely used to obtain physical and mechanical properties superior but physical properties and mechanical produced highly variable and not consistent.
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.
Design of PID Control System for Liquid Surface Height Using Root Locus Method Iskandar Azis
Jurnal Teknik Mesin (JTM) Vol 7, No 1 (2017)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

Control of the liquid surface height at a plant requires a system of control. The design of the control system requires a method of completion for height control system capable of controlling the liquid level remains stable at the desired level, namely the level of 8 and 10. The purpose of this research is to design a control system on a high surface of the liquid with PID control and implement methods of Root Locus. In this study, the liquid surface height of plant to be controlled ie MISO plant with two tanks. Root locus method has been able to control the high liquid level in the tank 1 with PID control parameters Kp = 58.27, Kd = 0.5. While high liquid level in the tank 2, PID control parameters are Kp = 75.7, Kd = 5. High surface of the liquid in the know stabilized by providing high varisi disruption of the liquid surface is high melibihi SP and under high-SP into PID control system.
Development of Dynamic Signal Analyzer Virtual Instrument (DSA VI): A Research Proposal Asmara Yanto; Anrinal Anrinal
Jurnal Teknik Mesin (JTM) Vol 6, No 1 (2016)
Publisher : LP2M - Institut Teknologi Padang

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Abstract

At present, one of the maintenance types that is being developed is the predictive maintenance based on the mechanical signals obtained by performing the mechanical quantities measurements. In general, a mechanical signal is a dynamic signal where to acquire this signal, it is required a dynamic signal analyzer (DSA) instrument.  However, the availability of DSA instruments in the market is limited in functionality and specification and also high cost. Therefore, in this work, a DSA instrument in the form of computer-based virtual instrument (DSA VI) would be developed. The DSA VI would designed by using the LabVIEW software and an Arduino UNO hardware. It is hopefully that the developed DSA VI capable to acquiring, processing, displaying, storing and reading the measured mechanical signals.

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