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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) Rekayasa Mesin ROTOR: JURNAL ILMIAH TEKNIK MESIN ELINVO (Electronics, Informatics, and Vocational Education) Journal of Mechanical Engineering Science and Technology Journal of Energy, Mechanical, Material and Manufacturing Engineering at-tamkin: Jurnal Pengabdian kepada Masyarakat Jurnal Teknologi Terapan International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Automotive Experiences GMPI Conference Series

Moch. Agus Choiron

Universitas Brawijaya

Author-ID : 247201

Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Other

Published : 39 Documents Claim Missing Document

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Analisis Penyerapan Energi Dan Pola Deformasi Crash Box Dengan Variasi Sudut Tirus Dinding Crash Box Pada Uji Simulasi Tabrakan Arah Frontal Choiron, Moch. Agus; Darmadi, Djarot B.; Anwari, Bintang Rahmaddian
Jurnal Rekayasa Mesin Vol 6, No 1 (2015)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Sistem transportasi merupakan salah satu kebutuhan yang penting untuk dipenuhi dalam mempermudah kehidupan pada zaman modern ini. Di sisi lain, meningkatnya kebutuhan akan hal tersebut juga akan ikut meningkatkan produksi kendaraan yang secara tidak langsung turut meningkatkan jumlah kecelakaan. Meninjau hal tersebut, standar keselamatan kendaraan yang lebih baik sangat dibutuhkan, salah satunya adalah crash box. Crash box merupakan sistem keamanan pasif yang digunakan untuk mengurangi tingkat keparahan kecelakaan yang dialami penumpang atau bagian kendaraan yang vital akibat tabrakan. Penelitian ini meninjau pengaruh variasi sudut tirus dinding crash box berpenampang lingkaran (circular) terhadap pola deformasi dan penyerapan energi pada uji simulasi tabrakan arah frontal. Penelitian dilakukan dengan software berbasis metode elemen hingga (MEH). Variasi yang digunakan dalam penelitian ini yaitu crash box dengan sudut tirus (Î±) 0,2Â°; 0,4Â°; 0,6Â°; 0,8; dan 1,0Â° dengan material crash box baja AISI 1340. Dari hasil penelitian diperoleh bahwa pola deformasi yang terbentuk adalah pola aksial dengan mode concertina dan campuran (concertina + diamond). Deformasi mode campuran terjadi pada crash box t a 1,6 Î± 0,0Â°; Î± 0,8Â°; Î± 1,0Â°. Penyerapan energi meningkat seiring bertambah besarnya sudut tirus dinding crash box, dengan kemampuan menyerap energi terbesar pada crash box dengan sudut tirus (Î±) 1,0Â° sebesar 10823 J. Semakin besarnya sudut tirus dinding crash box juga menunjukkan peningkatan penyerapan energi spesifik crash box.

Pengaruh Variasi Sambungan pada Crash Box Multi Segmen terhadap Kemampuan Penyerapan Energi dengan Uji Quasi Static Halman, Halman; Choiron, Moch. Agus; Darmadi, Djarot B.
Jurnal Rekayasa Mesin Vol 9, No 1 (2018)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Along with the elevating number of cars, accidents due to car crashes are increasing. Therefore, technology is needed to reduce the occurrence of the driversâ€™ injuries. Crash box is one of the potential passive safety technology which is widely observed today. Crash box is installed between bumper and chassis, aims to reduce the cassualties when the car crashes. In this article, crash box research was conducted by real experimental method through quasi-static test to evaluate the energy absorption capability of circular-shaped multi-segment crash box. Crash box material was made from aluminum A6063. The connection on each segment is a chamfer with 45o angle. The connections between segments 1 and 2 were varied with 3 connection models, those are 1/4, 1/3 and 1/2 of the total length, i.e.120 mm. The results of the study showed that, the highest energy absorption obtained from the crash box with connection of 1/2 and the energy absorption is 5249.726 J. Crash box type of 1/4 and 1/3 exhibit energy absorption of 3886.238 J and 3106.027 J respectively. Generally, the deformation pattern on the crash box is mixed-mode (axisymmetric-diamond).Â

Pengaruh Waktu Pemanasan (Anil) terhadap Ketahanan Korosi pada Gelas Metalik Berbasis Zirkonium Anggriawan, Ongki Budi; Choiron, Moch. Agus; Lin, Jing Chie
Jurnal Rekayasa Mesin Vol 5, No 3 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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The effects of annealing time on the corrosion resistance of a Zr-based bulk metallic glass (BMGs) were studied. The Zr 48 Cu 36 Al 8 Ag BMGs annealed at the temperatures of 471 oC for 0, 23 and 27 min respectively. The partially and fully crystallized was identified by differential thermal analysis (DSC) and by X-ray diffraction (XRD). The corrosion resistances of those BMGs was identified by open circuit potential (OCP), Tafel plot (TP), dan cyclic anodic potentiodynamic polarization (CAPD). The results show that the as-cast of Zr 8 48 Cu 36 Al BMGs (0 min, full amorphous) has higher corrosion resistance than that of the annealing specimen for 23 and 27 min, while the fully crystallized specimen (27 min) has worst corrosion resistance when compared to the other samples in 0.1 M NaCl solution. The improvement of the corrosion resistance for as-cast (0 min) is better than annealed specimen (23 and 27 min), because the as-cast does not have defects like grain boundary (full amorphous). When the annealing time is longer (27 min), the crystallites grow up (more boundary regions), therefore increasing the susceptibility to the localized corrosion.Keywords: Metallic glass, Zr-Cu-Al-Ag, corrosion, NaCl

Optimasi Dimensi Tebal Awal Pelat Pada Proses Pembengkokan Bentuk Jogged Flange Dengan Simulasi Tiga Dimensi Choiron, Moch. Agus; Ariseno, Agustinus; Prasetyo, Andika
Rekayasa Mesin Vol 3, No 3 (2012)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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One of the problem of bending process is the final product dimension that it is not agree with the expected results. To reduce trial and error of parametersdesign, designers can utilize computer simulations to predict parameter process virtually and more time-saving analysis. The aim of this study is determine the variations effect of initial blank material thickness to the flange flatness of the final product in the jogged flange process.In order to find the influence on the uneveness of the flange bend, the parameters of plate thickness, flange radius ratio, and flange length ratio are selected. Verification models were created to justify the trend data between modeling and the experimental results.From the result, the elevation difference on uneveness of the flange bendwas obtained. For initial blank material thickness dimensions, it can be seen that the minimum value of the uneveness defect can be obtained by using equal of plate area ratio. The observed increase of the flange radius could be attribute to decrease of uneveness of the flange bend. The increase of plate thickness, uneveness of the flange bend will be decrease.Keywords: initial blank material thickness, jogged flange, uneveness of the flange bend

Hardening Baja AISI 1045 Menggunakan Gel Aloe Vera Sebagai Media Pendingin Budiyanto, Eko; Choiron, Moch. Agus; Darmadi, Djarot B.
Jurnal Rekayasa Mesin Vol. 7 No. 2 (2016)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Quenching is a cooling method of heat treatment for metal hardening. Quenching refers to the process of rapidly cooling metal parts from the austenitizing or solution treating temperature, typically from within the range of 815 to 970 Â°C for steel. The selection of a quenchant medium depends on the hardenability of the particular alloy, the section thickness and shape involved, and the cooling rates to achieve the desired microstructure. The liquid quenchants of oil is commonly used in industrial manufacture. But, oil is not environmental. The aim of this research research is to find new quenchant for change oil as quenchant to more environmental. Gel aloe vera is purposed for it. The material used in this study is AISI 1045 steel. Cooling curve and cooling rate is measured by finite element model, ANSYS APDL 14.5. True experimental is done to view microstructure and measure hardness of steel. Simulation result shown that gel aloe vera has almost similar cooling curve and cooling rate with oil. Microstructure result of steel for gel aloe vera as quenchant is martensite in surface, bainite in center, and pearlite in between surface and center. Hardness number of steel for gel aloe vera as quenchant is 189.63 HVN in surface, 182.566 HVN in center, and 162.866 HVN in between surface and center. By simulation and true experimental analisys concluded that gel aloe vera has opportunities to change oil as quenchant for hardening process.

Optimasi Proses Multi-Pass Equal Channel Angular Pressing dengan Simulasi Komputer Choiron, Moch. Agus; Anam, Khairul; Prasetyo, Totok Tri
Jurnal Rekayasa Mesin Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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UFG (Ultra-fine grained) material is a material with a grain size between 10 nm to 1000 nm were developed to improve the quality of the material microstructure byreducing the grain size. Equal Channel Angular Pressing (ECAP) is a method to produce the UFG material by utilizing the shear stress on the material. Shear stress distribution in the material as it passes through the channel intersection is important to investigate so that it can be known the die design that can produce a uniform shear stress distribution in the material. In this study, computer simulation of multi-pass ECAP is carried out as the initial prediction for reducing the trial- error ECAP process. Multi-pass ECAP process is modeled with software based on Finite Element Method (FEM). Optimization is done with L9 Taguchi which parameters arenumber of pass, angle of intersection, outer fillet, and friction coefficient. By measuring the distribution of shear stress and plastic strain on the model will be generated optimization of multi-pass ECAP process.In the present study, the optimum setting for equal channel angular pressing prosses are pass of 6,intersection angle of 90 , outer fillet radii of 2 mm and coefficient friction of 0,1.Keywords: ECAP, multi-pass, Taguchi method, shear stress, plasticstrain.

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

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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 otherâ€™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

Pengaruh Crash Box Berbentuk Tabung 2 Segmen terhadap Kemampuan Menyerap Energi Impak dengan Simulasi Komputer Asroni, Asroni; Choiron, Moch. Agus; Purnowidodo, Anindito
Jurnal Rekayasa Mesin Vol 5, No 3 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Crash Box is a very important part as absorbing impact energy, especially in the frontal crash case. The purpose of this study was to determine the optimal design on two circular cross sections Crash Box to its ability to absorb impact energy and deformation pattern. The independent variable in this study were length, and thickness of the Crash Box with length of tube 1 (h ) = length of tube 2 (h 2 ) = 40, 50, 60 mm and thickness of tube 1 (t 201 1 1 ) = thickness of tube 2 (t ) = 2,5 ; 3 ; 3.5 mm were analyzed by the Taguchi method.The dependent variable is the energy absorbed and the deformation that occurs in Crash Box due to the impact test (Impactor) and is measured by using finite element-based software which is Ansys 14.5. Based on data from the simulation results, it can be obtained on one circular cross section Crash Box has the ability to absorb the energy of 2762.89 A. For optimum design of two circular cross sections Crash Box has the ability to absorb the energy of 4435.04 J. Optimum design of Crash Box has length of tube 1 (h 1 ) = 40 mm, length of tube 2 (h 2 ) = 60 mm, thickness of tube 1 (t ) = 3.5 mm, thickness of tube 2 (t ) = 3 mm. From the deformation pattern analysis, it can be seen that the deformation in the Crash Box can be divided into 2 types: Concertina mode (bending on the Crash Box walls is symmetric) and Diamond Fashion (bending on the Crash Box walls is not symmetrical).Keywords: Crash Box, Simulation, Energy, Deformation, Sectional Shape, Buckling.

Simulasi Komputer pada Optimasi Desain Hybrid Plating dalam Proses Bone Healing Mamungkas, Mohamad Irkham; Choiron, Moch. Agus; Suprapto, Wahyono
Jurnal Rekayasa Mesin Vol 5, No 3 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Hybrid plating method that combine locking screw and non-locking screw usually used for healing on bone fracture. This methodusedin order to get the smallestdeflectionandpreventpullout. The research purposed to obtain the optimal parameter design locking screw, such as position of locking screw, thickness and width plates by using Taguchi method which obtained level and variations factor. The material used in this study for screw and the plate were stainless steel SS 316 L. The load model used axial load of 1000 N. The number of hole plates were 8, which 4 holes in each section. In one section consist of locking screw and non locking screw Quasi experimental model applied ANSYS Workbench 14.5 finite element software. Results showed the optimum design was 3 locking scews in the left position, the thickness 4 mm and a width of plate 16 mm. The optimum design produce 0,039507 mm of average deflection and it can be denoted that failure and pull out was not occurred.Keywords : Hybrid Plating, Simulation, Deflection, Pull Out

Pengaruh Parameter Proses Incremental Backward Hole-Flanging terhadap Ketebalan Kerah pada Alumunium 1050A Fakhruddin, Muhammad; Choiron, Moch. Agus; Purnowidodo, Anindito
Rekayasa Mesin Vol 10, No 1 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.01.4

Conventional hole-flanging process in a small batch is sometimes costly or almost impossible due to the variety of the product profile. Recent studies showed that modern manufacturing was developed to overcome the limitation of the conventional hole-flanging process. Incremental backward hole-flanging (IBHF) was one of the strategies that developed to overcome this particular limitation. The main objective of this research was to investigate the influence of IBHF process parameters toward collar thickness of the product. It enables to measure the impact and behavior of each process parameters, i.e., forming speed, axial and radial forming step size toward the particular response parameter. The result showed that axial and radial forming step size was the main influence and the forming speed has a slight effect towards collar thickness. The behavior of each parameter was increased forming speed and radial forming step size would decrease collar thickness, whereas increased axial forming step size would increase collar thickness.

Co-Authors A.A. Ketut Agung Cahyawan W Abdul Hadi Djaelani, Abdul Hadi Agung Sugeng Widodo Agustinus Ariseno Ahmad Rivai Andika Prasetyo Anggriawan, Ongki Budi Anindito Purnowidodo Anindito Purnowidodo Asroni Asroni Asroni, Asroni Avita Ayu Permanasari Bangert, Axel Bintang Rahmaddian Anwari, Bintang Rahmaddian Dika, Johan Wayan Djarot B. Darmadi, Djarot B. Djuanda, Dagus Resmana Eko Budianto EKO BUDIYANTO FATRA NONGGALA PUTRA Fauzi, Katanda Fajar Hadi Suyono Halman, Halman Helmy Mukti Himawan Helmy Mukti Himawan, Helmy Mukti Hermawan, Muhammad Vendy Herry Santosa Hidayati, Nafisah Arina Ida, Zumrotul Imam Kusyairi Imam Kusyairi, Imam Indradi Wijatmiko Ismi Choirotin Ismu Rini Dwi Ari Jatmiko Awali Jatmoko Awali Junipitoyo, Bambang Lilis Yuliati Lin, Jing Chie M. Fahrur Rozy Hentihu Maulana, Eka Mohamad Irkham Mamungkas Muhammad Fakhruddin Musyaffa, Dzikri Amali Nadya, Mesti Onny Setyawati Panca Mudjirahardjo Pratama, Fajar Adi Raden Arief Setyawan Redyarsa Dharma Bintara Ridwan, Ridwan Rismanto, Muhammad Rivai, Ahmad Rudy Soenoko Sabitah, A'yan Safari, Rachmat Sandhagen, Carl sarip, sarip Setyo Hariyadi Shiddieqy, M. Hasbi Ash Sofyan Arief Sofyan Arief Setyabudi Solikhin, Atfalus Solikhin Sudjito Soeparman Sugiono Sugiono Suudy, Ahmad Hamim Taryono, Taryono Teguh Dwi Widodo Totok Tri Prasetyo Wahyono Suprapto Wakhidah, Delia Hani Widodo, Teguh Dwi Winarto Winarto Wirawan, Willy Artha Yudy Surya Irawan Zakariya, Yahya Zumrotul Ida

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