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Yanuar Burhanuddin
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Gd. H Lt.2 Jurusan Teknik Mesin Fakultas Teknik Universitas Lampung Jl. Prof. Soemantri Brojonegoro No.1 Bandar Lampung
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Jurnal Mechanical
Published by Universitas Lampung
ISSN : 20871880     EISSN : 24601888     DOI : https://doi.org/10.2960/mech
Core Subject : Science, Engineering,
Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Jurnal Mechanical (eISSN 2460 1888 and pISSN 2087 1880), is a peer-reviewed journal that publishes scientific articles from the disciplines of mechanical engineering, which includes the field of study (peer) material, production and manufacturing, construction and energy conversion. Articles published in the journal Mechanical include results of original scientific research (original), and a scientific review article (review). Mechanical journal published by University of Lampung and managed by Department of Mechanical Engineering, Faculty of Engineering for publishing two periods a year, in March and September .
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 8 Documents
 1 
Search results for , issue "Vol 2, No 2 (2011)" : 8 Documents clear
Studi Reduksi Beban Termal ke Dalam Ruangan Secara Konveksi dengan Sistem Underground Thermal Storage Sebagai Altenatif untuk Mendinginkan Ruangan Rumah Hunian Indra Mamad Gandidi
JURNAL MECHANICAL Vol 2, No 2 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

Space cooling is required all year around in the tropics area especially Indonesia. To provide the space cooling requirement, the electricity cost and environment impact are important aspect that  it must be considered. The household in the tropical area is real conditions  require a cooling device and greatest potential to use alternative cooling.  In fact, solar radiation over the roof surface can be thrown to the environmental by convection mechanism in order to the room can be remaining in comfortable condition.The experimental investigation was performed to two model of household. That is household without and  using evaporator, respectively. Also in this reasearch, evaporator was placed in two location, over and or under surface of the roof.  Water from underground thermal storage is used as a working fluid to pick up amount of heat over the roof and then rejected on thermal storage environment. The mesurement of experimental data was conducted start from 08.00 WIB to 17.00 WIB. Roof temperature will fluctuation with raise of time start from the morning to evening. The maximum temperature difference between household without and with evaporator are ± 12 0C with water mass flow rate 0.0125 kg/s and ± 8 0C with water mass flow rate 0.0187 kg/s for evaporator over and under the surface of the roof respectively.This research result have still uncomfortable condition for household. However, this research can be used as an initial step to build up a cooling system with low cost of electrical power and environmental friendly. Moreover, thermal reduction on the wall and the window to increase in the performance of this method are necessary. Then,  the impromevent of roof geometry has to performed to keep the maximum interface area of heat transfer.  Keywords: convection mechanism, space cooling, household
Analisis Uji Destructive Dan Non Destructive Terhadap Hasil Sambungan Las V-Tunggal Baja AISI 1045 Nafrizal .
JURNAL MECHANICAL Vol 2, No 2 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

This paper reports the result of study on the strength behaviour of welded joint both destructive and nondestructive testing. The parent metal choosen for the testing was AISI 1045 steel with main parameters of single-V welded form and horizontal welding position. The electrodes used for each parameter were AWS E-7016 LB-52 with diameter/amperes of 2.6 mm/80 Amp, 3.2 mm/110 Amp, and 4.0 mm/130 Amp. The specimens were nondestructively tested using the well-known radiography X-ray according to ASTM-1A for detecting welding flaws and its size. Chemical composition test was performed for the material of parent and welding metal. Tensile testing was performed to destructive based on the ASTM E-8 standard  for tensile test. The results show that    the tensile strength of the weld joint is reduction by about 28% compared to the parent metal without welding. The reduction in tensile strength is believed to be caused by welding defect, include porosity, inclusion, incomplete penetration, and reduction in carbon content from 0.5% in parent metal to about 0.1% in the welding region.  Keywords: smaw, tensile strength, welding defect
Studi Perilaku Kegagalan Sambungan Las Tipe TConjunctions Pada Baja Karbon Rendah Dengan Pendekatan Experimen dan Numerik Mohammad Badaruddin
JURNAL MECHANICAL Vol 2, No 2 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

This research is conducted to investigate failure behavior of welding structure in T-conjunctions type. Welding joint failures were analyzed by both experimental and finite element analysis (2D) approach in terms of stress intensity factor mode I (KI). The stress at the welding zone was strongly influenced by specimen geometries and the ratio of L/h1. The stress intensity factor (SIF) was increased significantly. Whereas, the minimum SIF of specimen #X1 and #Y3 are 58 MPa.√m and 165 MPa.√m, respectively. Failure of welding specimen was more dominated in the zone with the highest stress concentration and also affected by material discontinuity at which the stress was not generated continuously, but localized in any certain area. Specimen without welding did not yield a maximum stress. However, plastic zone formation locally decreases the stress concentration. Discontinuity in the welding specimen does not give rise to plastic stream, thus it will raise the stress concentration at the welding extension region. Discontinuity can be observed by the Von Misses stress pattern at stress welding zone for the welding specimen whereas the specimen without welding was only occurred near the extension zone. Keywords : T-type conjuction welding, stress intensity factor  (SIF), Von Misse stress
Analisis Prestasi Lampu Petromax Berbahan Bakar LPG Harmen Burhanuddin
JURNAL MECHANICAL Vol 2, No 2 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

In order to decrease subsidy cost of kerosene consumption, Indonesian government right now proposes to convert kerosene to LPG. Consequently, the price of kerosene is expensive in society. LPG can be alternatively used as fuel for the petromax lamp. The use of LPG for the petromax lamp fuel is strongly recommended for sidewalk food sellers as source of light at night if the electricity source is not available. Therefore, it is important to investigate some advantages of the use of LPG as replacing of kerosene for the petromax lamp. The performance of the petromax lamp using LPG as fuel had been carried out with parameters: rate of fuel consumption and light intensity, representing to the need of energy consumption. In the view of economic, the performance of the petromax lamp using LPG was also compared with the performance of petromax lamp using kerosene.  The results show that the use of LPG is more clearly efficiency than those of use of kerosene. The fuel energy needed by the petromax lamp to generate lighting is around 224.87MJ/h for kerosene and 213.24 MJ/h for LPG. The energy consumption of LPG is decreased by a factor of 1.05. Economically, the comparison of the price between kerosene and LPG is very significant. The price of kerosene consumption per hour was approximate Rp.941.00, whereas the price of LPG consumption per hour was approximate Rp. 368.00. This shows that if the petromax lamp is operated using LPG for 6 h, the seller foods can save around of Rp 3,438.00. Keywords: petromax lamp, kerosene, LPG, energy consumption.
Pengaruh Rasio Panjang dan Diameter Pipa Suplai terhadap Unjuk Kerja Model Pompa Tanpa Motor (Hydraulic Ram Pump) Jorfri B Sinaga
JURNAL MECHANICAL Vol 2, No 2 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

A hydraulic ram pump is environmentally friendly devices using the energy from a stream of water falling from a low head as the driving power to pump part of the water to a head much higher than the supply head for agricultural or domestic use. In the use of this pump, one of factors that influence the performance is ratio of drive pipe length to diameter (L/D). This paper presents the experimental study of effect of ratio of drive pipe length to diameter on hydraulic ram pump designing model. This hydraulic ram pump designing model is tested on various ratio of drive pipe length to diameter, namely 158, 165, 176, and 202. The results of the testing of the model hydraulic ram pump shows that the operation of this pump should  use the ratio of drive pipe length to diameter (L/D) of 176. Using supply head of 1 m and volume of air chamber of 5702,754 cm3, water can be pumped with the volume flow rate of 3 lit/min to the height of  8,5 m, and the efficiency of this pump is 78,7  %. The data of the testing results also show that using the volume of air chamber of 4562,203 cm3, and supply head of 1 m, this model of hydraulic ram pump can lift water of 2,727 lit/min  to the height of 9,5 m with the maximum efficiency of 87,96 %..
Analisis Fenomena Penampang Alir Vertical Axis Wind Turbine (VAWT) Tipe Heliks Terhadap Kecepatan Angin Sebagai Pembangkit Listrik Alternatif Berskala Rumah Tangga Martinus .
JURNAL MECHANICAL Vol 2, No 2 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

Penelitian ini membahas fenomena (turbulensi angin dan penyebaran tekanan) pada penampang alir vertical axis wind turbine (VAWT) tipe helix terhadap kecepatan angin sebagai pembangkit listrik alternatif berskala rumah tangga. Tujuan penelitian ini adalah untuk mengetahui turbulensi aliran angin terhadap sudu angin helix vertikal dan daya yang dihasilkan turbin dengan variabel penelitian kecepatan aliran udara (4, 8, dan 12 m/s), bentuk blade (1/2 lingkaran dan lurus dengan masing-masing berjumlah 3 buah sudu), dan pola aliran (laminar dan turbulen). Penyimulasian memanfaatkan software GAMBIT 2.2.3 dan FLUENT 6.3.26. Simulai dimulai dengan membuat pemodelan 2 buah bentuk blade melalui GAMBIT (tahap preprocessing), lalu membagi elemen atau objek tersebut menjadi bagian-bagian terkecil (meshing) melalui FLUENT, mendefinisikan kondisi batas untuk aliran udara yang akan dilalui blade, dan penginterasian dari objek yang telah dibuat terhadap sejumlah kondisi batas tersebut (tahap solusi). Hasil penelitian menunjukkan bahwa turbulensi penampang alir pada blade ½ lingkaran (1,4 – 28 m/s) yang tidak jauh berbeda dengan blade lurus yaitu 1,1 – 22 m/s (kecepatan udara 4 m/s, demikian dengan kecepatan lainnya). Sedangkan, turbulensi contour of pressure terbaik pada blade ½ lingkaran yaitu 13,8-40,4 Pascal (kecepatan 4 m/s). Daya tertinggi yang diserap blade (dayaangin)terhadap dayaturbin terdapat pada kecepatan udara 4 m/s dengan efisiensi sebesar 19,6% (9,335 dari 47,628 Watt). Sedangkan, yang terendah pada 12 m/s dengan efisiensi 10,34% (132,967 dari 1285,956 Watt). Kata kunci : Vertical axis wind turbine, VAWT, blade, sudu, ½ lingkaran, lurus, GAMBIT, FLUENT, pembangkit listrik, turbulensi
Effect of Cutting Parameter Variation on Drilling of AISI 1045: Experimental and Simulation Yanuar Burhanuddin
JURNAL MECHANICAL Vol 2, No 2 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

This work is focused on the study of the effect of spindle speed and feed rate on the tool temperature distribution in the drilling of AISI-1045 steel. The e data were collected under different cutting conditions. The maximum tool temperature is predicted during the drilling using finite element simulation techniques. The predicted temperature was compared to the measured temperature. The result shows the finite element simulation is reasonable.  Analyses show that the range of temperature from 157 °C to 288 °C. The difference between measured temperature and simulated temperature are in the range of 17-38%. The s increased in accordance with the increasing of cutting speed and feed. Keywords: drilling, spindle speed, feed, tool edge, maximum temperature..
Pengaruh Posisi Terhadap Kekuatan Baut dan Gaya Geser Ditinjau dari Morfologi Fracture Surface pada Sambungan Plat Nofriady Handra
JURNAL MECHANICAL Vol 2, No 2 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

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Abstract

Bolt extension as link which do not destroy connective by component at process unload tide used many in so many industrial area like at bridge construction, building construction and various appliance of engine tool. Usage of amount 3 (bolt fruit three) at 5 (standard hole five) at one particular extension construction can be seen at tacking on two plate with bevel form at building roof construction. If usage more at one particular construction extension hence will have an in with wide of section, apart between hole at each bolt as well as its esthetics value. Formation arrange situation an bolt extension at one particular construction very having an effect on to failure of extension construction, is in this case done conducted by examination to an extension construction by 3 bolt fruit at 10 position differ from the target of searching optimal position in accepting style shift at bolt extension construction used by bolt is galvanic type have full of thread to. Is later got by tension value shift at each bolt and got by optimal position (strong position) and weak position from 10 existing position in accepting style shift [at] extension construction. Optimal position in this experiments are position 2 and 4. The position not optimal is position 6. Keywords: fracture surface, bolt , optimal position of bolt, deformation.

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