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All Journal Rekayasa Mesin Journal of Energy, Mechanical, Material and Manufacturing Engineering Pilar Teknologi : Jurnal Penelitian Ilmu-ilmu Teknik
Yudy Surya Irawan
Jurusan Teknik Mesin Fakultas Teknik Universitas Brawijaya
Mechanical Engineering

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Perbaikan Layout Mesin Produksi Longsong Munisi menggunakan Metode Systematic Layout Planning dan Blocplan (Studi Kasus : Divisi Munisi - PT. Pindad (Persero)) Kustriyanto, Eddy; Pambuditama, Ishardita; Irawan, Yudy Surya
Jurnal Rekayasa Mesin Vol 7, No 3 (2016)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (774.775 KB) | DOI: 10.21776/ub.jrm.2016.007.03.1

Abstract

Layout of the existing machines using cell system has been applied since 2005 and the machine operators have known the weaknesses, so it is necessary to improve the layout of the machines. This study was conducted to improve  the machines layout cartridge case production by using Systematic Layout Planning and Blocplan with quantitative and qualitative considerations. The qualitative considerations are working ergonomies, while the quantitative considerations are the distance of product routing between one process with the next process and backtracking from product flow between workstations with another. A qualitative assessmen tends to be based on subjective considerations of each department facitity. Blocplan was the simple and practical method used in the settlement of this problem. Blocplan changed the layout by calculating the minimum total distance traversed in the movement of the materials between workstations. The application of Systematic Layout Planning methods and Blocplan in improving the layout and shortening production time in Hall OP decrease of product displacement distance is 26.77 meters (13.50%) i.e.: before the improvement  was 198.36 meters, after improvement is 171.59 meters. Relayouting of the cell for improving the groups in the type of process and the machines also creates a higher state of comfortable working condition.
Effects of Origami Pattern Crash Box and Rectangular Pattern Crash Box on The Modelling Of MPV Car Structure on Deformation Kusyairi, Imam; Choiron, Moch. Agus; Irawan, Yudy Surya; Himawan, Helmy Mukti
Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 3, No 2 (2018)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (647.441 KB) | DOI: 10.22219/jemmme.v3i2.6831

Abstract

 Crash box serves as a kinetic energy absorber during collision. It has a tube shape, which is located between bumper and chasis. The crash box design requires development in order to reduce buckling mode and obtain symmetry folding mechanism, so it will achieve greater energy absortion. The researchers find a method to reduce tension due to impact by providing dents in crash box geometry. This research observed origami pattern crash box design having dents functioned as pre-folded so that collapse mode can be predicted and stable. In this research, the crash box was modeled according to the size of bumper and chassis on the MPV car. Testing simulation was performed by modelling Impactor as rigid body and crash box as flexible. Fixed support was housted in the surface of rear side of the crash box. Simulation process was started from the impactor moving to supress crash box. This Impactor collision led to deformation on the crash box. Crash box material was AA7004-T7, it was modelled as bilinier isotropic hardening. Based on the research result, the addition of pre folded pattern is able to reduce impact force at the first impact and has stable characteristic as well as predictable collapse mode. 
Pengaruh Perlakuan Alkali (NaOH) Terhadap Morfologi dan Kekuatan Tarik Serat Mendong Witono, Kris; Irawan, Yudy Surya; Soenoko, Rudy; Suryanto, Heru
Jurnal Rekayasa Mesin Vol 4, No 3 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (692.104 KB)

Abstract

Chemical modification on fiber by using Natrium Hydroxide (NaOH) solution directly affect to the fiber structure such as changing the chemical composition of the fiber and improve the performance of natural fiber as the composite reinforcement. The purpose of this study is to inverstigate the effects of NaOH solution to the tensile strength and the mofology of Mendong fiber. The concentration of NaOH solution were 2,5% v/v; 5% v/v; dan 7,5% v/v on this experiment. Mendong fiber was soaked for 2, 4 and 6 hours in NaOH solution. The temperature on this study was 26 o C. The tensile strength of Mendong fiber was increased by increasing the NaOH solution concentration and duration of soaking after exceed the concentration of NaOH solution and duration of soaking the tensile strength would be decreased. The highest tensile strength was 497,34 MPa with NaOH solution concentration 5% v/v and the duration of soaking, 2 hours. The roughness of Mendong fiber by soaking in NaOH solution was higher than without soaking in NaOH solution. Soaking on the highest concentration of NaOH solution caused the highest roughness.Keywords: NaOH solution, Mendong fiber, tensile strength, roughness.
Pengaruh Waktu dan Tekanan Gesek terhadap Kekuatan Tarik Sambungan Paduan Aluminium dan Baja Karbon pada Pengelasan Gesek Continuous Drive Pah, Jack Carol Adolf; Irawan, Yudy Surya; Suprapto, Wahyono
Jurnal Rekayasa Mesin Vol 9, No 1 (2018)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (745.566 KB) | DOI: 10.21776/ub.jrm.2018.009.01.8

Abstract

The objective of this research was to investigate the effect of friction time and friction pressure on the tensile strength of the joining of two dissimilar materials, aluminum alloy AA6061 and carbon steel, with continuous drive friction welding process. Variations of friction times of 5 seconds, 7 seconds, 9 seconds, and 11 seconds, at each variation of friction pressures of 24 MPa, 32 MPa, and 40 MPa. Controlled variables in this friction welding process were rotational speed of 1600 rpm, upset pressure of 79 MPa which was applied for 60 seconds and diameter of friction surface of specimens which were 15 mm. The resulting strength of the bonding were than evaluated on the basis of tensile strength. Observations of temperature change during the welding process, the distribution of Vickers hardness values around the bonds area, and micro photographs, were used as support to the analysis. The results showed that the longer friction time was applied, the higher tensile strength of the bonds would be, until it began to decrease after a certain maximum value of the tensile strength had been reached. Increased of the tensile strength of the bonding did not occur linearly due to the variation of friction pressure at 9 seconds and 11 seconds of friction time. At 5 seconds and 7 seconds of friction time, increase of friction pressure caused a linear increase of tensile strength. Higher temperatures in the welding process increased the thickness of brittle layer at the bonds boundary. The increase of the brittle layer thickness causes decrease of the tensile strength of the bonds.
Kekuatan Tarik Dan Porositas Silinder Al-Mg-Si Hasil Die Casting Dengan Variasi Tekanan Irawan, Yudy Surya; Oerbandono, Tjuk; Agus Aristiyono, Dian Fitria; Pratikto, Pratikto
Jurnal Rekayasa Mesin Vol 4, No 1 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (525.789 KB)

Abstract

Tensile strength and porosity of die-casted Aluminum Alloys Al-Mg-Si with various applied pressure were investigated. Al-Mg-Si was melt in the electric induction crucible with temperature of 850 degree Celsius. Melt aluminum was poured in the metallic mould that pre-heated in 150 degree Celsius. Melt aluminum was pressed by the plunger with pressure of 0.1, 10, 30, and 50 MPa and held for 5 minutes. After aluminum was solidified, specimens for tensile strength and porosity test were machined. Tensile strength, porosity test and microstructure observation were conducted. Results of tensile strength and porosity test show that the higher plunger pressure, porosity becomes lower and tensile strength of specimens to be higher. Maximum tensile strength occurs in the specimens that pressed in 50 MPa. It occurs due to minimum porosity and small grains of microstructure in the specimens.Keywords : Aluminum, Die casting, Pressure, Tensile Strength, Porosity, Microstructure
Pengaruh Perlakuan Silane Dan NaOH Pada Permukaan Serat Kontinyu Limbah Epulur Sagu (Metroxylon Sp) Terhadap Daya Serap Air Dan Kekuatan Bending Matheus, Josef; Irawan, Yudy Surya; Soenoko, Rudy
Jurnal Rekayasa Mesin Vol 4, No 3 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (804.226 KB)

Abstract

Utilization of composite materials at this moment is growing, along with increasing use of these materials in widespread ranging from a simple household appliances to the industrial sector. The purpose of this study is to determine the mechanical properties and water absorption of continuous fiber composites sago pith waste, on a percentage variation in respectivevolume fraction 10%, 30%, and 50%. The fiber is treated by immersion treatment with 5% NaOH alkaline 2 hours and 2% solution of silane for 30, 60, and 90 minutes. Mechanical properties of the composite test results that at 47.37 MPa tensile strength and bending strength of 72.27 MPa with a percentage of the volume fraction (50%), under fiber soaking time (30 minutes) are in the same value. The smaller the value of water uptake, it is contained in immersion treatment of sago pith waste continuous fibers with a percentage of 50% and the volume fraction of fiber soaking time 90 minutes.Keywords: Composites, mechanical properties, water absorption, sago pith waste, volume fraction
Pengaruh Kuat Arus Pengelasan Dua Layer dengan Metode GTAW dan SMAW terhadap Kekuatan Tarik pada Plat ASTM A 36 Awali, Jatmoko; Irawan, Yudy Surya; Choiron, Moch. Agus
Rekayasa Mesin Vol 5, No 2 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (461.476 KB)

Abstract

Welding is a combining method of two materials by using thermal energy. It was divided into several groups including the classification of the liquid, press and soldering. Arc welding is the most commonly used in every time, such as welding with consumable and not consumable electrodes. Two types of arc welding have deficiency and excess, respectively; combining both types of arc welding is needed to cover each other’s excess. The method in this research was combining of welding GTAW (Gas Tungsten Arc Welding) and SMAW (Shield Metal Arc Welding) with variation in Root Pass and Cover Pass position. The current of GTAW with 100A, 130A, 160A, and SMAW with 65A, 80A, and 95A were used in this research. ASTM A 36 was used as the material. The plat thickness was 7mm and single V groove 600. Combining the welding GTAW-GTAW between 100A and 100A for the first and second layer has the highest tensile strength, and the lowest tensile strength was in combination of welding between GTAW-SMAW with 65A and 100A.Keywords: Tensile strength, GTAW, SMAW, two layers and ASTM A 36
Kekuatan Puntir dan Porositas Hasil Sambungan Las Gesek AlMg-Si dengan Variasi Chamfer dan Gaya Tekan Akhir Tyagita, Dicky Adi; Irawan, Yudy Surya; Suprapto, Wahyono
Jurnal Rekayasa Mesin Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (734.707 KB)

Abstract

Friction welding is the most suitable method for joining aluminum alloys. Aluminum alloys have limitations heat to concentrate only in weld area when used arc or gas welding. That causes it is has good thermal conductivity. The parameters that influence on friction welding are friction time, compressive force, upset force, rotational speed, and chamfer angle. The purpose of the research was to know influence of chamfer angle and upset force on the Al-Mg-Si. The chamfer angles variated 0, 15°, 30°, 45° and upset force variated 157 kgf, 185 kgf and 202 kgf. Specimens were friction welded with rotation speed of 1600 rpm, compressive force 123 kgf for 120 seconds, and upset force variation by 157, 185, 202 kgf for 120 seconds. In addition torsion and porosity testing were also performed on friction welding product. Results showed that specimens with a chamfer angle 15 ° in various upset force has maximum shear strength, so were on specimens with a chamfer angle 15 ° has minimum percentage of porosity in various upset force.Keywords : shear strength, friction welding, chamfer angle, upset force, porosity and Al-Mg-Si
Pengaruh Fraksi Volume Serat Kayu Gelam (Melaleuce Leucandendra) terhadap Kekuatan Tarik dan Impak Komposit Bermatrik Polyester Arief, Saifullah; Pratikto, Pratikto; Irawan, Yudy Surya
Jurnal Rekayasa Mesin Vol 7, No 3 (2016)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (505.667 KB) | DOI: 10.21776/ub.jrm.2016.007.03.3

Abstract

The purpose of this research is to find the effect of volume fraction variation of “gelam” bark fiber on tensile and impact strength of polyester composite. The filler material was the “gelam” bark fiber with volume variation ratio of 10%, 30 %, 50 % and 70 %. Alkalization of the “gelam” bark fiber used 5% of NaOH and 2 hours of soaking time. Mechanical testing was carried out by tensile and impact testing. The matrix for bonding the “gelam” bark fiber was polyester resin type 157 BTQN and 1% concentration of MEKPO catalyst. The mechanical properties are obtained from tensile and impact testing: The results of tensile testing; slowed the highest tensile strength of compositre with 70% of ‘gelam bark fiber was 15.623 MPa. The results of impact testing: obtained the highest impact strength in composete with 70 % percentage of ‘gelam’ bark fiber is24.772 J.
Analisa Ketidaksesuian Beban Kerja Matakuliah Praktek Berbasis Time Study Dan Maynard Operation Sequence Techniques (Most) (Studi Kasus Pada Jurusan Teknik Mesin Politeknik Negeri Ambon) Pattiasina, Nanse Henny; Soenoko, Rudy; Astuti, Murti; Irawan, Yudy Surya
Jurnal Rekayasa Mesin Vol 4, No 2 (2013)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (354.391 KB)

Abstract

Implementation of the practice course in the Department of Mechanical Engineering Polytechnic of Ambon during this work takes too long, so beyond the allocation of the appropriate amount of time available in the curriculum credits. Therefore it is necessary to analyze the workload mismatch practice course. Stages of student work time measurements performed using the method of Time Study and Maynard Operation Sequence Techniques (MOST) to obtain the normal time and standard time student practical work. Correlation with time available on the course curriculum for the Job Machine Tools 4 the number of credits is 144 hours, then declared for the methods of time study needs more work time (342.6 hours / 5 students), so the result is inadequate (less than 198, 6 hours). As for the method of MOST, obtained the required sufficient time (114 hours / 5 students).Keywords : measurement of time, the burden of college practice, MOST, standard time, normal time
Co-Authors Abdulla, Farg Abdulla M Agus Setiawan Amiruddin, Muhammad Agung Anindito Purnowidodo Arief, Saifullah Darmadi, Djarot Bangun Dian Fitria Agus Aristiyono Dicky Adi Tyagita Djuanda, Dagus Resmana Eko Budi Santoso Eko Hendry Suyono Endi Sutikno Helmy Mukti Himawan, Helmy Mukti Heru Suryanto I Nyoman Gede Wardana Imam Kusyairi, Imam Ishardita Pambudi Tama Jatmiko Awali Jatmoko Awali Josef Matheus Jufra Daud Johanis Abanat Kris Witono Kustriyanto, Eddy Kustriyanto, Eddy Moch. Agus Choiron Murti Astuti Nadya, Mesti Nanse Henny Pattiasina Pah, Jack Carol Adolf Pambuditama, Ishardita Pratikto Pratikto Pungky Eka Setyawan Rudy Soenoko Safari, Rachmat Sutrisno, Sutrisno Tjuk Oerbandono Wahyono Suprapto Widodo, Teguh Dwi