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INDONESIA
Jurnal Teknik Mesin Indonesia
Published by Badan Kerja Sama Teknik Mesin
ISSN : 1907350X     EISSN : 25977563     DOI : -
Core Subject : Engineering,
Aerospace Engineering Automotive Engineering Control & Systems Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Teknik Mesin Indonesia “JTMI” " adalah jurnal ilmiah sains dan teknologi yang diterbitkan oleh Badan Kerjasama Teknik Mesin Indonesia. JTMI meliputi bidang konversi energi, material, desain mekanikal, manufaktur dan otomasi
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 7 Documents
 1 
Search results for , issue "Vol 13 No 2 (2018): Jurnal Teknik Mesin Indonesia" : 7 Documents clear
Pemodelan creep pada pipa sanicro 25 austenitic steel dengan beban tekanan 11.3 MPa dan temperatur 750 ºC Tri Widodo Besar Riyadi; David Setiadhi; Agus Dwi Anggono; Agung Setyo Darmawan
Jurnal Teknik Mesin Indonesia Vol 13 No 2 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v13i2.109

Abstract

Penelitian ini bertujuan untuk memodelkan creep sebuah pipa Sanicro 25 Austenitic Steel bertekanan rendah pada temperatur 750 ºC menggunakan software berbasis metode elemen hingga. Jenis material dengan beban tekanan dan panas diambil berdasarkan data hasil eksperimen penelitian lain. Geometri pipa mempunyai diameter luar 38 mm, tebal 8.8 mm dan panjang 50 mm. Beban panas sebesar 750 ºC merata pada seluruh bagian pipa, dengan tekanan dalam pipa sebesar 11.3 MPa. Simulasi dilakukan dengan software Abaqus/CAE 6.14-5 dengan durasi 7 x 106 detik. Hasil simulasi untuk creep strain menunjukkan hasil yang sesuai dengan data hasil eksperimen dengan error 2.72%. Pada tekanan 11.3 MPa menghasilkan creep maksimum senilai 3.162 x 10-4. Distribusi tegangan pada penampang pipa menunjukkan bahwa tegangan terbesar terjadi pada bagian dalam pipa sebesar 16.91 MPa dan menurun sampai mencapai nilai terendah pada penampang pipa bagian luar sebesar 14.58 MPa. Hasil simulasi juga menjelaskan pengaruh tekanan terhadap kurva regangan creep terhadap waktu.
Penerapan Metode Taguchi-GRA untuk Optimasi Kebulatan, MRR dan Kekasaran Permukaan pada Proses Bubut Am. Mufarrih; Hesti Istiqlaliyah
Jurnal Teknik Mesin Indonesia Vol 13 No 2 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v13i2.106

Abstract

This research was conducted to optimize turning process with several quality characteristics based on orthogonal array using Taguchi-GRA method. Experiments were carried out by varying the turning process variables such as depth of cut, material removal rate and cutting speed. Some of the quality characteristics that are optimized are roundness, MRR and surface roughness. The experimental design uses L9 orthogonal array. The experimental results show that machining performance in the turning process can be effectively improved through this method. The GRG value representing several quality characteristics increased by 34% from 0.7017 to 0.9403.
Perancangan Model Balancing Robot untuk Sarana Transportasi Tenaga Medis M Munadi; Mochammad Ariyanto; Royyan Saputra; Joga D Setiawan
Jurnal Teknik Mesin Indonesia Vol 13 No 2 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1159.254 KB) | DOI: 10.36289/jtmi.v13i2.110

Abstract

Robots have become mechanical equipment that can perform physical tasks, either by monitoring or using predefined programs (artificial intelligence). One type of robot is a mobile robot that has a driving mechanism in the form of a wheel and leg so that it can move from one place to another. One type of mobile robot includes balancing a two-wheeled robot and can balance itself to the surface of the earth. In this study, we will try to design a model of balancing robots that in future development can be used in hospitals by medical personnel as an environmentally friendly means of transportation. This is because medical personnel often have to be mobile in monitoring patients. Related to this, so that the model of balancing robot can be balanced, one type of controller is used. The sensor used is the NI myRIO accelerometer sensor to detect angular changes, and the gyroscope sensor to detect angular velocity. In order to balance the model of balancing robot, the Proportional-Integral control method is used to adjust the speed of the DC direction of the rotating motor. Tuning Proportional- Integral control parameters is done by two methods, namely Ziegler-Nichols method and trial and error. The good tuning from Proportional Integral is the gain value Kp = 5 and Ki = 0.001.
Kekuatan Bending Panel Komposit Lamina Berbasis Karung Plastik Bekas (Woven Bag) Heri Yudiono; Samsudin Anis; P Pramono
Jurnal Teknik Mesin Indonesia Vol 13 No 2 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (762.323 KB) | DOI: 10.36289/jtmi.v13i2.93

Abstract

Waste made from plastic, especially plastic sacks has become a national problem because of the intensity of its ever increasing use and the behaviour of the people who are less concerned about the environment, so as soon to find control efforts that are pro-environment, pro-technology and pro-economic. This research aims to analyze the bending strength, modulus of elasticity, and the degree of deflexivity of the lamina composite panels from used plastic sacks as an alternative material which is tough, lightweight, and strong. The research method used was an experimental method with the category of Pre-Experimental Designs type Static Group Comparations. The tests were conducted for the control groups and experimental groups. The experimental group is the group that is treated by varying the orientation of the used woven plastic sack fibers 0°/0°/0°/0°, 0°/+30°/0°/+30°, 0°/+45°/0°/+45°, 0°/+60°/0°/+60° and 0°/+90°/0°/+90°. The control group in this study were specimens that were not treated in the form of bumpers as product controls. The specimens of bending test are using the ASTM D790 standard. The results of the research reveal that the orientation of the fiber affects the bending strength of the lamina composite based on used plastic sacks. The highest bending strength in fiber orientation 0°/+60°/0°/+6°.. is 123.4 N/mm² and the that previous price is 24.96% higher than the bumper bending strength as a product control of 92, 6 N/mm². Debonding occurs on test specimens due to the release of bond in the contact area of the fiber-matrix caused by the shearing forces that the matrix cannot hold.
Analisis kekuatan tarik, kekerasan dan struktur mikro pada pengelasan SMAW yang menggunakan elektroda E 6013 dengan variasi gerakan elektroda Andri Santoso; Awal Syahrani; M Mustafa
Jurnal Teknik Mesin Indonesia Vol 13 No 2 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v13i2.96

Abstract

This study aims to determine the effect of electrode motion on the mechanical properties and microstructure of SMAW welding with E 6013 electrode. The SMAW welding process uses a variety of straight, zigzag and spiral electrode movements. The electrode used is E 6013 with a diameter of 3.2 mm. The current size used is 90 Amperes. The type of camp used is a V-shaped with an angle of 60o, a root height of 2 mm and a root range of 3 mm. Tests conducted are tensile testing, hardness and microstructure observation. The highest tensile strength value in the spiral electrode motion is 616.6 Mpa and the lowest in the zig-zag electrode is 596 MPa. While the highest strain value found in the motion of zig-zag electrode is 22.91% and the lowest in the spiral electrode movement is 19.41%. For the highest modulus of elasticity is found in the straight electrode movement of 12070.02 Mpa and the lowest in the motion of the zigzag electrode is 10339,48 Mpa. The highest hardness value is in welding with zigzagging electrode movement that is 147,44 kg / mm2 and the lowest in straight electrode movement is 143,19 kg / mm2
Deteksi kegagalan unbalance dan looseness pada sistem rotor dinamik menggunakan wavelet decomposition method Abdollah Abdollah; Raymundus Lullus Lambang Govinda Hidajat; Budi Santoso
Jurnal Teknik Mesin Indonesia Vol 13 No 2 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v13i2.98

Abstract

Rotating machinery is widely used in industry. Rotating machinery is very important, so that defect engine or parts can disturb industrial production process. Faults that are often occured are unbalance, misalignment, looseness, bearing fault, etc. This paper discuss unbalance and looseness fault detection in rotordynamic system with speed of 600, 800, and 1000 cpm. Data collection is conducted using acquisition data with accelerometer sensor attached in vertical direction on house bearing. Vibration signal data is processed with wavelet decomposition method using Matlab 2016. Fault diagnosis is indicate using spectrum. The result show that in unbalance condition, there is a dominant peak at frequency of 1x cpm for all speed variations. While in looseness condition, there is a dominant peak at frequency of 2x cpm for all speed variations. In both conditions, amplitude of signature at each speed variation increase with the rotation speed. It concludes, wavelet decomposition method provide distinct peaks correspond to fault frequency, so that fault detection can be accurately performed.
Studi visualisasi pola aliran dua fase air-udara pada vertical upward circular mini-channel Zulfikar Mahmud; Budi Santoso; Dominicus Danardono
Jurnal Teknik Mesin Indonesia Vol 13 No 2 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v13i2.99

Abstract

Two phases flow was important phenomenon in the industrial or engineering factories. Especially, the small or mini-channel was applied in the heat exchanger devices such as compact head exchanger and refrigeration evaporator/condenser. The circular transparent mini-channel with 2,5 mm and 5 mm inner diameters were used in this experiment. The flow pattern was identified. Bubble, slug, churn and annular were formed in vertical upward air-water flow. Bubbles flow pattern had elongated air-phase form with no aeration at the end air-phase. The flow pattern was plotted and analysed by flow pattern map in previous research. Actually, the new flow pattern map was reformed for 2,5 and 5 mm inner diameter pipe because of flow pattern map differences with the reference research. Both flow pattern maps had similarity form about mini-channel flow patern map.

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