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METAL : Jurnal Sistem Mekanik dan Termal

metal
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Published by Universitas Andalas

ISSN : 25981137 EISSN : 25974483 DOI : -

Core Subject : Science, Engineering,

Automotive Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

METAL: Jurnal Sistem Mekanik dan Termal translated as METAL: Journal of Systems in Mechanical and Thermal is a scholarly peer-reviewed journal published by Mechanical Engineering Department of Engineering Faculty at Universitas Andalas, Padang, Indonesia. The journal focused on the mechanics and thermal aspects of the mechanical engineering area, and accepted articles are in these subjects: Energy - Renewable energy - Green industry - Energy conversion Mechanical System Engineering - Solid body mechanics - Machine construction - Vibration and control - Mechatronics - Tribology Production System Manufacturing engineering - Product design and development - Production technology - Production logistics and transportation Materials Engineering - Material technology - Nanotechnology

Arjuna Subject : Teknik (semua kategori) - Teknik Mesin

Articles 8 Documents

Search results for , issue "Vol 2, No 2 (2018)" : 8 Documents clear

Introduksi Teknologi Pengering Tenaga Surya Untuk Meningkatkan Produktivitas Dan Pendapatan Usaha Kerupuk Ubi Di Kecamatan Kamang Magek Kabupaten Agam Adli Havendri; Dendi Adi Saputra; Eka Satria; Syafi’i Syafi’i
METAL: Jurnal Sistem Mekanik dan Termal Vol 2, No 2 (2018)
Publisher : Department of Mechanical Engineering, Universitas Andalas

The micro, small and medium scale of industrial enterprises for cassava crackers is growing rapidly in Kamang Magek District of Agam Regency. Cassava crackers are the typical crackers which only find in the Agam Regency. The taste is crunchy and can be stored for a long time, making this cracker a special food souvenir. In the process of making, cassava is boiled and pounded so that it becomes pasta. Pasta will be formed and dried in the sun. The crackers that have been formed should be dried in a maximum of 1 day. Today, the makers of cassava crackers are still dependent on sunlight, so they often cannot meet market demand during the rainy season. Therefore, through the IbM (Ipteks bagi Masyarakat) program for the community funded by DIKTI, solar drying technology is introduced by using a type of solar tunnel. The result shows the drying time is 2 times faster than traditional drying process. Hopefully, this technology can help the community of the cassava crackers maker to increase their productivity.

Reduksi Gaya Drag Silinder Sirkular dengan Penambahan Square Disturbance Body Melalui Simulasi Numerik 2D Unsteady-RANS pada Reynolds Number 34800 Rina Rina; Ruzita Sumiati; Adriansyah Adriansyah
METAL: Jurnal Sistem Mekanik dan Termal Vol 2, No 2 (2018)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Circular cylinder has a strong adverse pressure gradient. When a fluid flows around the circular cylinder, it will produce aerodynamics force. One of them is the drag force which strong enough. Hence, control of flow need to reduce the drag force with placed a disturbance body on the upstream side. The purpose of this study is to compare and complement the experimental research of drag reduction that has been done before. The aerodynamics characteristics of the disturbance body and cylinder are modelled in two dimensions Unsteady-RANS by using fluent with turbulent flow. It is found that the mean drag and the lift fluctuation of the cylinder can be reduced by the upstream disturbance body with the s/D = 0.107 (here s and D are side length of the disturbance body and the diameter of cylinder, respectively). The position of the disturbance body is varied at (α) 20º, 30º, 40º, 50º and 60º with a gap distance (δ = 0.4mm). Reynolds number based on cylinder diameter ReD = 3.48x104. Fluid interaction between circular cylinder with two disturbance body can increase boundary layer transition from laminer to turbulent to produce small drag. It is found that the characteristics of the flow significantly depend on the position of disturbance body. The optimum condition for the drag force reduction is at the angle α = 30º about 53 %.

Penghitungan Beban Kritis pada Struktur Kolom Kontinu dengan Dua Bentangan akibat Pembebanan Secara Aksial Eka Satria; Nusyirwan Nusyirwan; Muhammad Irfan
METAL: Jurnal Sistem Mekanik dan Termal Vol 2, No 2 (2018)
Publisher : Department of Mechanical Engineering, Universitas Andalas

This paper is aimed to determine the critical buckling load of continous column with two spans under axial loading. Firstly, the critical buckling loads is calculated theoretically based on concept of solid mechanic. The calculation is conducted for various ratio of L1/L2. This ratio shows a comparison of two span lengths. The used ratios in this calculation are L1/L2= 1/3,1/2, 2/3, 1/1, 3/2, 2/1, and 3/1. The critical buckling loads is calculated based on elastic analysis. For practical application, the results then are approached by regression technique of a least square method to find the best fit of design equation. Later, this equation is recommended as a practical equation in determining the critical buckling of continous column with two spans under axial loading.

Pengidentifikasian dan Pencarian Manusia Berbasis Citra Menggunakan Unmanned Aerial Vehicle Zulkifli Amin; Derry Meldi
METAL: Jurnal Sistem Mekanik dan Termal Vol 2, No 2 (2018)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Indonesia often suffers from disasters triggered by natural damage caused by human actions such as floods and landslides. The difficulty of finding victims of natural disasters is the cause of the slow process of evacuation of victims. Because the time required to perform a search is relatively long, it causes a large number of unsaved victims. The availability of camera and UAV equipment and image processing and control technologies can be used to facilitate the search for victims of natural disasters. Image processing is an image processing technique that converts the input image into another better quality image. An image processing device mounted on a UAV that can fly at a certain height can search with missions that have been entered on the software mission planner. This tool is also more accurate because it comes with a GPS that reports the coordinates of the UAV. From the tests conducted with three high variations of 5 meters, 10 meters and 15 meters, obtained an average photo of 28, 51 and 85 photos for each height respectively. This identification system works well. It is known from that detected objects can be captured images. There are differences of number images being captured in each height, this happens because the camera specification is not supporting, as well as the influence of wifi router signal is disconnected at a certain distance. The distance between the UAV and the wifi router will affect the process of detecting objects as well as image capture.

Analisa Produk Pola Cetakan Lilin yang Diproduksi Menggunakan DIY-CNC-Endmill Firman Ridwan; Ryan Rahman
METAL: Jurnal Sistem Mekanik dan Termal Vol 2, No 2 (2018)
Publisher : Department of Mechanical Engineering, Universitas Andalas

The use of technology in ring jewelry manufacturers in Indonesia is still very limited. Ring jewelers still use traditional methods in the process of forming mold patterns. This causes difficulties in producing ring jewelry that requires precision and high accuracy on each product. Unprecised wax pattern of ring jewelry can result in dimensional errors when product is manufactured so the dimension is far from the size of the design. To avoid this, it can be overcome by using CNC machine technology. CNC machines can work consistently and precisely. For this reason, therefor, an End-Milling type CNC machines that has accuracy of up to 1/1000 mm is designed. The experiments showed that the results with high accuracy having standard deviation of repeatability of inner diameter 0.020736441, repeatability of outer diameter 0.020493902 and repeatability of thickness 0.043817805.

Pengaruh Fraksi Massa Serat Terhadap Kekuatan Fatik Material Komposit Berpenguat Serat Tandan Kosong Kelapa Sawit Devi Chandra; Randha Mulia; Dedison Gasni; Gusriwandi Gusriwandi
METAL: Jurnal Sistem Mekanik dan Termal Vol 2, No 2 (2018)
Publisher : Department of Mechanical Engineering, Universitas Andalas

The present study was investigated the effect of fiber mass fraction on the tensile and fatigue strength of oil palm fiber reinforced composite and resin as the matrix. Fatigue test has been performed by using rotary bending fatigue machine. The specimens were made by press hand lay-up with matrix to fiber mass ratio was 90:10, 80:20 and 70:30 respectively. Fracture surface of fatigue specimens have also been observed by using digital camera to knowing the failure mode. The results showed that the tensile and fatigue strength and fatigue life increased with increasing the fiber mass fraction as seen in the S-N curve. The fatigue limit was found 0.27 MPa, 0.55 MPa, and 0.82 MPa for composites with 90:10, 80:20 and 70:30 of matrix to fiber mass ratio respectively. The observed failure modes were matrix cracking, fiber debonding, and fiber breaking.

Studi Experimental Terhadap Perpindahan Kalor Pada Tumbukan Multiple Droplets Dengan Variasi Frekuensi Tetesan Indro Pranoto; Dannys Arif Kusuma; Teguh Wibowo; Fauzun Fauzun; Deendarlianto Deendarlianto; Indarto Indarto
METAL: Jurnal Sistem Mekanik dan Termal Vol 2, No 2 (2018)
Publisher : Department of Mechanical Engineering, Universitas Andalas

The effect of drop frequencies and surface temperature on the maximum spreading ratio, heat transfer rate and heat transfer coefficient of convection have been studied experimentally. The experiments were carried out by investigating different values of drop frequencies at 250, 400 and 600 drops/minute. The surface material of stainless steel with a temperature range of 120°C to 200°C was used in the study. An image processing technique was used to measure the diameter of droplets that were captured by using a high-speed camera. The results of the study show that by increasing frequency of drops has improved significantly the maximum spreading ratio, heat transfer rate and heat transfer coefficient of convection. The results also shown that by increasing the drop frequency has increased accordingly the droplet contact with the surface. It was found that, at higher surface temperature has contributed to the increase of the heat transfer rate and convection heat transfer coefficient. This study suggest that the peak and wetting limit conditions has occurred at the surface temperature of 180°C.

Analisis Frekuensi Pribadi Dan Modus Getar Struktur Pesawat Tanpa Awak Tipe Flying Wings Lovely Son; Rachmad Afandi
METAL: Jurnal Sistem Mekanik dan Termal Vol 2, No 2 (2018)
Publisher : Department of Mechanical Engineering, Universitas Andalas

One of the important consideration in designing an unmanned aerial vehicle (UAV) is the dynamics characteristic of UAV structure. The dynamics characteristic of UAV structure can be evaluated from its dynamic parameters such as : natural frequencies and mode shape. These parameters play an important role in determining the system’s dynamic response. In general, a low stiffness structure is more sensitive to the dynamic load in comparison with a high stiffness structure. In this research, modification UAV structural stiffness is conducted by varying rib and spar number and configuration on UAV wing. Evaluation of rib and spar number and configuration effect to the natural frequency and mode shape of UAV structure is conducted numerically and experimentally. The simulation results show that the natural frequencies increases with increasing of the number of spar and decreases with decreasing of the number of rib.

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Contact Name
Lovely Son

Contact Email
lovelyson@eng.unand.ac.id

Phone
+6281213552846

Journal Mail Official
metal@eng.unand.ac.id

Editorial Address
Kampus Limau Manis, Jurusan Teknik Mesin, Fakultas Teknik, Universitas Andalas

Location
Kota padang,

Sumatera barat

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Lovely Son

Contact Email lovelyson@eng.unand.ac.id

Phone +6281213552846

Journal Mail Official metal@eng.unand.ac.id

Editorial Address Kampus Limau Manis, Jurusan Teknik Mesin, Fakultas Teknik, Universitas Andalas

Location Kota padang, Sumatera barat INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Lovely Son

Contact Email
lovelyson@eng.unand.ac.id

Phone
+6281213552846

Journal Mail Official
metal@eng.unand.ac.id

Editorial Address
Kampus Limau Manis, Jurusan Teknik Mesin, Fakultas Teknik, Universitas Andalas

Location
Kota padang,

Sumatera barat

INDONESIA