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All Journal Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Rekayasa Mesin Journal of Enviromental Engineering and Sustainable Technology ROTOR: JURNAL ILMIAH TEKNIK MESIN Journal of Energy, Mechanical, Material and Manufacturing Engineering Conference SENATIK STT Adisutjipto Yogyakarta Proceedings Series on Physical & Formal Sciences
Anindito Purnowidodo
Staf Pengajar Jurusan Teknik Mesin Universitas Brawijaya Malang
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Upaya Peningkatan Sifat Mekanik Baja Mild Steel Melalui Perbaikan Kualitas dengan Heat Treatment Annealing dan Holding Time pada Heat Treatment dengan Taguchi Method Rahmadianto, Febi; Purnowidodo, Anindito; Soenoko, Rudy
Jurnal Rekayasa Mesin Vol 5, No 1 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

The purpose of this study was to determine the ability of the mechanical tensile strength and hardness and microstructure of the steel material Mild Steel. The electrodes used were a new electrode, the electrode was added calium compound is then heated to 100 °C, 100 ° C and heated electrode. Strong currents are used 75 A, 85 A, and 95 A, for a distance of specimen 3 mm, 4 mm and 5 mm. This study used an experimental methodology and the research conducted in the laboratory. The test results showed that the maximum tensile strength is in the condition of the electrode plus a calium compound and heated at 100 ° C, 95 A current and a distance of 5 mm , with Heat Treatment 20 minutes is 278 N/mm2 . Similarly , for the region of weld metal hardness indicates the optimal hardness using electrodes were added and heated calium compounds 100oC , current 95 A and a distance of 5 mm , with Heat Treatment 20 minutes , which is 185 VHN . HAZ hardness to areas with the same test conditions with Weld Metals, hardness value is 371 VHN.Keywords: SMAW, current, Taguchi, optimum treatment.
Pengaruh Fraksi Volume Serat Pelepah Gebang (Corypha Utan Lamarck) Terhadap Sifat Mekanik Pada Komposit Bermatrik Epoksi Johanis Abanat, Jufra Daud; Purnowidodo, Anindito; Irawan, Yudy Surya
Jurnal Rekayasa Mesin Vol 3, No 2 (2012)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Buri Palm trees (Corypha Utan Lamarck) is one of the many types of flora in Indonesia that has not been used optimally. At the leaf midrib of buri palm has fibers that have not been developed from the engineering side. There for in this study used buri palm leaf midrib fiber as an alternative reinforcement material for manufacturing of epoxy composites that can be useful for manufacturing the body of boat, the interior of boat and also for helmets. Thus, this study aims to determine the tensile strength and impact strength of the material in accordance with the desired application. Before being used the fiber from the buri palm leaf midrib should be tested of the tensile strength and the data obtained at 182,24 MPa. Then also tested Alkali treated fiber NaOH 5% and a maximum tensile strength obtained is 212,29 MPa on the sample by treatment for 2 hours. Base on these preliminary data then manufacturing of composite samples using fibers of alkaline NaOH 5% treatment for 2 hours. Variations of fiber volume fraction are from 0%, 10%, 20%, 30%, 40%, 50%, 60% and 70%. The tensile testing sample based on the ASTM D638-3 standard and impact test samples according to ISO 179-1 standard. From the test results is known that the tensile strength of composites increases with increasing fiber volume fraction up to 70% of fiber that is equal to 51,993 MPa. Impact strength also increased up to 70% fiber volume fraction and the maximum impact strength occured is 6,953 J.Keywords: composite, buri fiber, epoxy, volume fraction
Evaluasi Faktor Intensitas Tegangan pada Ujung Retak dengan Lubang Penghambar Rambat Petak Purnowidodo, Anindito
Rekayasa Mesin Vol 1, No 1 (2010)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

The evaluation of stress intensity factors in the crack tip interacting with stoping hole of crack growth was conducted by computer simulation, and this was carried out on vareid configuration of stopping hole. The results of the simulation show that the position and zise of stopping hole affect the magnitude of the stress intensity factor. The main cause of the fluctuation of the stress intensity factor is that the stoping hole configuration affects the interaction of stress in the vicinity of crack tip.Keywords : Hole Configuration, Stress Interaction, Stress Intensity Factors
Karakteristik Fiber Metal Laminate Akibat Beban Impak Balistik Dari Peluru Kaliber 9 mm Full Metal Jacket (FMJ) Fadly, Muhammad Syaiful; Purnowidodo, Anindito; Setyarini, Putu Hadi
Jurnal Rekayasa Mesin Vol 12, No 1 (2021)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2021.012.01.12

Abstract

Estimated damage levels from ballistics impact zone provide valuable information to make bulletproof materials more effective. Therefore, this study aims to determine the impact of ballistics including hole shape, hole depth, macro, and microstructure on fiber metal laminate. The characteristics of ballistics impact for each configuration target is obtained from experiment and comparison based on simulations with finite element method. Test experiments used short-barreled fire guns at a distance of 5 meters with a normal attack angle based on the National Institute of Justice standard. Simulation with Johnson-Cook plasticity models for aluminum plate and orthotropic material model for kevlar/epoxy. The experiment and simulation results showed that the projectile is able to perforate the first layer (aluminum plate) and the second layer (Kevlar/epoxy) while the last layer (backplate) is deformed to form a bulge. The aluminum plate is perforated by the failure of petaling formation on the backside and spread of dimple fracture around the area of the petal which indicates ductile fracture while kevlar/epoxy is perforated by projectile with failure of fiber fracture on primary yarn, fiber pull-out, fiber stretching and fiber rupture.
Analisa Kegagalan pada Spindle Mesin Batch Centrifugal Purnowidodo, Anindito; Wahjudi, Ari; Prawira, Riza
Jurnal Rekayasa Mesin Vol 2, No 1 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Failure analysis was conducted on the failure shaft of batch centrifugal. In the analysis the stress analysis was used to know the stress distribution, and in conjuction with stress analysis the life time of the component can be estimated. In addition, the fractography anlaysis together with mechanical properties test were carried out to understand the mechanism of the failure. With respect to the result of analysis shows that the failure was caused by fatigue crack initated on the surface of shaft due to the inhomogeneus mechanical properties, in this case, the hardness is lower than that on sub surface of the shaft. Besides that, the stress concentration was found take place on the surface of shaft on which the crack was initated. Further, it was known that during machining process, the material of shaft was heated on elevated temperature on the surface to ease the process. The heating reduced the hardness as well as the strength of the material.Keywords : Failure, Fatigue, Crack.
THE INFLUENCE OF PROCESS PARAMETERS TOWARD COLLAR HEIGHT ON INCREMENTAL BACKWARD HOLE-FLANGING PROCESS Muhammad Fakhruddin; Mochammad Agus Choiron; Anindito Purnowidodo
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 2 No. 1 (2017)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v2i1.4899

Abstract

Abstract                  The experimental study of the influence of process parameters towards collar height on incremental backward hole-flanging (IBHF) process with aluminium plate workpiece was presented in this paper. The effect of process parameters toward collar height which produced by IBHF process was investigated. Experiments were performed with a CNC machine, a 30o conical forming tool, and aluminium plates. The process parameters are feed speed with two levels, radial forming step size with three, and axial forming step size with three levels. Some parameters were kept constant, i.e., spindle speed, initial hole diameter, final hole diameter, and conical forming tool diameter. Digital Vernier caliper was used to measure the height of the collar. Experimental results of IBHF process have shown that the feed speed (vf) parameter has no effect toward collar height. Increased radial forming step size (Δx/y), increased the collar height also. Increased the axial forming step size (Δz) reduced the collar height. Keywords: hole-flanging, incremental sheet metal forming, incremental backward.
PERILAKU RAMBAT RETAK PADA POROS PEJAL SETELAH BENDING OVERLOADS Anindito Purnowidodo
Journal of Environmental Engineering and Sustainable Technology Vol 1, No 1 (2014)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (407.721 KB) | DOI: 10.21776/ub.jeest.2014.001.01.2

Abstract

Penelitian rambat retak pada poros pejal berbentuk silindris dilakukan dengan cara eksperimen, pengamatan kecepatan dan perilaku rambat retak setelah siklus beban berulang bending overload dilakukan dengan mengamati retak yang merambat pada permukaan specimen yang berbentuk poros pejal.Dari hasil penelitian ini diketahui bahwa terdapat perbedaan perilaku rambat retak antara specimen tanpa overload dan dengan overload. Pada specimen dengan diameter 8 mm, setelah overload umur retak bertambah pendek dan kecepatan retak meningkat. Pada specimen dengan diameter 9 mm, setelah overload umur retak akan bertambah panjang dan kecepatan retak akan menurun. Perilaku rambat retak setelah overload pada poros pejal tergantung dari ukuran diameter. Kemungkinan penyebabnya adalah berhubungan dengan arah rambat retak dibawah permukaan specimen. Kata kunci : Rambat Retak, Poros Pejal, Overload
KARATERISTIK MAKRO DAN MIKRO PLAT BAJA-ALUMINIUM TERHADAP KETAHANAN BALISTIK Helmy Purwanto; Rudy Soenoko; Anindito Purnowidodo; Agus Suprapto
Prosiding SNST Fakultas Teknik Vol 1, No 1 (2015): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 6 2015
Publisher : Prosiding SNST Fakultas Teknik

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Abstract

Pengembangan material tahan balistik atau peluru tidak hanya pada material baja, tetapi mengarah pada material yang mempunyai massa jenis ringan. Aluminium merupakan alternatif material yang dapat diaplikasikan dalam kontruksi tahan balistik. Perpaduan kekerasan dan keuletan menjadi salah satu faktor untuk menahan laju peluru yang dikeluarkan dari senapan. Pembuatan panel ganda berlapis (layer) aluminium-baja atau baja-aluminum dilakukan untuk mengetahui ketahanan balistik dengan menggunakan peluru kaliber 5,56 x 45 mm (MU5-TJ) yang ditembakkan dari jarak 15 m. Aluminium cair dituang pada plat baja ketebalan 6 mm hingga menjadi satu-kesatuan plat ganda berlapis dengan metode squeeze casting. Hasil pengujian balistik menunjukkan panel aluminum-baja dan baja aluminium tidak dapat tertembus peluru walaupun terjadi penurunan kekerasan plat baja karena proses panas pada saat pengecoran. Lapisan yang lebih keras di sisi muka mempunyai ketahanan balistik yang lebih  optimal dibandingkan dengan lapisan yang lebih lunak pada sisi depan dari arah laju peluru. Kata kunci: plat berlapis, pengecoran squeeze, ketahanan balistik
Pengaruh Variasi Desain Crash Box Pola Origami terhadap Kemampuan Penyerapan Energi Imam Kusyairi; Moch. Agus Choiron; Anindito Purnowidodo
ROTOR Vol 8 No 2 (2015)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Abstract

This study developed crash box design on origami patterns. These typically have got the dents whichserve as pre-folding. Therefore, the collapses modesarepredictable and stable. The geometry variation of crash box comprises four factors, i.e. basin length (c), distance between the basins (b), thickness (t) and number of segments (M). Meanwhile, the design of optimal variations utilized L9 Taguchi and deformas pattern analysis. The method of this study used software finite and the element of crash box modelling consists of three components, e.g. impactor, crashbox, and fixed support. The material used is AA7003-T7 modellingas thebilinear isotropic hardening. Model loading waconveyed 64 km/h on the impactor. The research shows that the response of quality characteristics of energy absorption is the larger the better. The energy absorption respectively covered 1)thickness (t), 2) segment (M), 3) distance between basins (b), and 4) basin length (c).Whereas, the highest energy absorption of the crash box occupied by the origami pattern no. 3 with c = 9 mm, b = 60 mm, t = 2 mm and M = 6,  reaching 7,247,826 J. In fact, the deformation behavior of the model no. 3 tends to have a symmetrical deformation without buckling. Keywords:Crash box, origami, energy absorbed,deformation
Deformation and Energy Absorption of Fiber Metal Laminates (FMLS) After Ballistic Impact Load Muhammad Syaiful Fadly; Anindito Purnowidodo; Putu Hadi Setyarini
SENATIK STT Adisutjipto Vol 5 (2019): Peran Teknologi untuk Revitalisasi Bandara dan Transportasi Udara [ISBN 978-602-52742-
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/senatik.v5i0.361

Abstract

Estimated damage levels from ballistic impact zones provide valuable information to make bulletproof materials more effective. This study aims to determine the impact of ballistics including deformation and energy absorption in fiber metal laminates (FMLs) that collide with 9 mm FMJ caliber bullets at speeds of 426 m/s. Finite element method modeling is done using ANSYS 18.1 workbench software. The simulation results show that FMLs can hold the bullet rate with deformation on the back of the target (DOPIII) of 8,55 mm and total energy absorption of 426,59 J at 0,000095 s. The combination of two materials, Al 5083 in the outer layer and kevlar/epoxy as the core, results in faster energy absorption and maximum stress concentrations only occur in the kevlar/epoxy so there is no damage to the first and subsequent layers.
Co-Authors A.A. Ketut Agung Cahyawan W Agung Sugeng Widodo Agus Setiawan Agus Suprapto Akhmad Ali Imron Amros Alfonsius Tuati, Amros Alfonsius Andika H P Ari Wahjudi Arief Rizki Fadhillah Arthur Yanny Leiwakabessy Asroni Asroni Asroni, Asroni Avita Ayu Permanasari Bayu Agung Wicaksono Choiron, Mochamad Agus Choiron, Mochammad Agus Djarot B. Darmadi Djarot B. Darmadi, Djarot B. Eko Hendry Suyono Farit Hendro Wibowo Febi Rahmadianto Fikrul Akbar Alamsyah Helmy Purwanto Hilmi Iman Firmansyah Ida, Zumrotul Imam Kusyairi Imam Kusyairi, Imam Jufra Daud Johanis Abanat Khairul Anam Moch. Agus Choiron Moch. Agus Choiron Moch. Agus Choiron Moch. Agus Choiron, Moch. Mochammad Agus Choiron Muhammad Fakhruddin Muhammad Syaiful Fadly Muhammad Syaiful Fadly Nasmi Herlina Sari Putu Hadi Setyarini Rivai, Ahmad Riza Prawira Rudy Soenoko Rudy Soenoko Setiyabudi, Sofyan Arief Setyabudi, Sofyan Arief Setyabudi, Sofyan Arif Sofyan Arief Sonief, Achmad As’ad Sugiarto S Suteja Suteja, Suteja Syahrizal Syahrizal Tamara F. Utama Tawaf, Nanang Wahyono Suprapto Wijil Pambudi Yudy Surya Irawan