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All Journal Jurnal Teknik ITS Journal of Engineering and Technological Sciences Jurnal Teknik Mesin Indonesia EPI International Journal of Engineering JMES The International Journal of Mechanical Engineering and Sciences Sewagati

Achmad Syaifudin

Departemen Teknik Mesin, Fakultas Teknologi Industri, Institut Teknologi Sepuluh Nopember

Author-ID : 4029805

Aerospace Engineering Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

Published : 8 Documents Claim Missing Document

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Articles

Analisis deformasi pada coupling element dari automatic mechanical coupler: studi kasus LRT Palembang Achmad Syaifudin; Betti Mawar Kalista; Agus Windharto
Jurnal Teknik Mesin Indonesia Vol 14 No 2 (2019): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Coupler is a mechanical component that used to connect one carbody to another. The resistance to exceptional load and the endurance to normal load become the important parameter of safety in the operation. This study aims to conduct deformation analysis numerically on coupling element of automatic mechanical coupler, which is utilized for light rail transit (LRT), based on actual operational loads. The component of coupling element observed is coupling link and hooked plate. An 3D solid model is developed without any geometric simplification in order to acquire actual phenomenon. Material used in this study is stainless steel that having isotropic behavior and following ASTM standard of A633 Grade E. Three type of simulations are applied, i.e. static and transient simulation, to obtain static and dynamic safety factor of coupling element, and fatigue simulation based on three transient loading modes, to obtain the life cycle of coupling element. The simulation results reveal that the observed coupling element is safe from subjected exceptional and normal service loads. Moreover, the simulation indicates that the critical component based on maximum von Mises stress and life cycle is coupling link and hooked plate, respectively.

Deformation Analysis of Self-Expanding Stent Considering Plaque and a New Expanding Mechanism Katsuhiko Sasaki; Yukiko Tomooka; Ryo Takeda; Achmad Syaifudin
EPI International Journal of Engineering Vol 1 No 1 (2018): Volume 1 Number 1, February 2018
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar

In this research, effects of material properties of stent materials, such as nitinol and ferrous alloy, on a self-expanding stent are studied by the stent deployment simulations using finite element method (FEM). Stent, vessel, and plaque are modeled by using AutoCAD. The model is imported to a finite element analysis software Ansys 15.0 and the deployment analysis of the stent is carried out. In addition, two methods of the unsheathing of the self-expanding stent are studied: (1) a conventional method where a stent comes out from one end of the sheath and (2) a new method in which a stent comes out from the center of the sheath. Also, both the area stenosis ratio and Dog-Boning are discussed referring the simulations conducted in the paper.

Analisis Stabilitas Arah Mobil Toyota Agya G dengan Variasi Jumlah Penumpang, Kecepatan Belok, Sudut Belok dan Kemiringan Melintang Jalan Faisal Rahman; Achmad Syaifudin; I Nyoman Sutantra
Jurnal Teknik ITS Vol 6, No 1 (2017)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

Mobil jenis Low Cost Green Car (LCGC) semakin banyak digunakan masyarakat karena harganya yang murah dan ramah lingkungan. Meski termasuk kendaraan dengan biaya produksi yang rendah, adanya analisis perilaku arah kendaraan tetap diperlukan untuk menjamin kenyamaan dan keamanan pengemudi. Pada penelitian ini, analisa slip, skid dan guling dilakukan untuk mengetahui stabilitas kendaraan jenis LCGC, yaitu Toyota Agya. Pengaruh jumlah penumpang, kecepatan, sudut belok dan kemiringan melintang jalan terhadap slip, skid dan guling juga diperhitungkan. Sebagai komparatif studi, uji jalan dilakukan untuk mendapatkan koefisien understeer dan mengetahui kecepatan kendaraan dalam kondisi skid. Hasil penelitian menunjukkan bahwa mobil Toyota Agya mengalami kondisi stabilitas paling baik ketika dinaiki oleh 2 orang penumpang dengan sudut kemiringan melintang jalan 5.7°. Sedangkan kecepatan maksimum kendaraan tidak terguling terjadi pada kecepatan 94,987 km/jam untuk sudut belok 5° dan pada kecepatan 46,585 km/jam sudut belok 25°.

Perancangan Coupler untuk LRT di Indonesia Andhika Muttaqien Priyambodo; Achmad Syaifudin
Jurnal Teknik ITS Vol 7, No 2 (2018)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

PT INKA menggunakan coupler tipe knuckle, yang biasa dipakai untuk kereta api, untuk sambungan gerbong pada kereta ringan (light rail transit, LRT). Namun, pemakaian coupler tipe ini sangat tidak sesuai sebab coupler untuk kereta api dapat menarik beban hingga 42 ton, sedangkan berat gerbong LRT hanya 25 ton. Dalam penelitian ini, dilakukan studi numerik untuk re-design ukuran coupler. Optimasi ukuran dipilih sebagai basis dalam metode re-design. Analisis numerik dilakukan dengan bantuan Catia Simulia V6 – Structural Validation. Material yang digunakan adalah AAR M201 grade E dan grade D sesuai dengan yang digunakan oleh PT INKA. Beban yang diterapkan adalah beban aktual LRT Jabodebek dengan jumlah trainset 6 buah. Optimasi ukuran dilakukan dengan reduksi ukuran head coupler knuckle hingga 50%. Panjang leher coupler dipertahankan untuk menyesuaikan dengan ruang sambungan pada carbody. Analisis angka keamanan dilakukan pada tiap model yang telah direduksi. Hasil simulasi mengindikasikan bahwa ukuran coupler yang paling optimum, yaitu ukuran pada skala reduksi 80% dari model awal. Tegangan tarik dan tekan maksimum yang terjadi berturut-turut sebesar 450 MPa dan 308 MPa, yang mana masih berada dalam zona aman.

Effect of Asymmetric Geometry on the Flexibility of Stent Achmad Syaifudin; Ryo Takeda; Katsuhiko Sasaki
JMES The International Journal of Mechanical Engineering and Sciences Vol 1, No 1 (2017)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v1i1.2183

Mechanical characteristic assessment of the new stent design is important to improve the performance during the stenting process. Stent with good performance in geometric assessment should pass several tests in the unexpanded and expanded condition. The FEM assessment is expected to replace the actual mechanical assessment to save the cost and time of the manufacturing. In this study, the FEM assessment is conducted using the structural nonlinear analyses in ANSYS R15.0. The stent type used in the simulation is the Asymmetric stent and the Sinusoidal stent. The assessments included in this study are the flexibility test on the unexpanded condition (single-load and multi-load) and that on the expanded condition under single point loading. The three-point bending test is chosen as the flexibility test, either for the unexpanded or expanded condition, due to its simplicity. To restrain angular deformation and more save the computation process, a symmetry model (due to longitudinal and angular plane) of each stent type is constructed. By utilizing Multi Point Constraint (MPC) element, the loading is subjected over a pilot node at the center line of the stent. The analysis results showed that Asymmetric stent has lower flexibility comparing with a Sinusoidal stent in the unexpanded configurations. In the case of an Asymmetric stent, its inflated-side is more flexible than the fixed-side.

Effect of Fluctuating Load on Fatigue of PPCW Flat Wagon Teguh Suprianto; Achmad Syaifudin; Lanang Wahyu Pamungkas; Julendra Bambang Ariatedja; Abdul Rohman Farid
JMES The International Journal of Mechanical Engineering and Sciences Vol 7, No 1 (2023)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v7i1.14354

Flat wagons are logistic railway vehicles that are always subjected to a heavy dynamic load. One type is the 42 ton flat wagon developed by INKA Ltd., which is well known as PPCW flat wagon. The initial design of this flat wagon was operated using a container. Nevertheless, it can operate safely without a container as well. This study was conducted to mitigate the effect of fluctuating load on fatigue of 42 ton flat wagons as cement carriers, with or without a container. The 3D flat wagon model was built and exported to ANSYS Workbench 19 to simulate the effect of the variable and mean stresses generated within the wagon. Several operational modes were applied to the model, such as an accelerated condition of 0.21 m/s2, a constant straight track, a turn uphill track, an inclined track, a turn downward track, and a decelerated condition of 0.3 m/s2. Transient structural, static structural, and modal analysis types are applied in the simulation consecutively to adapt the track variations. Due to the loading being dominated by compressive load, a negative stress ratio of 1.5 was utilized as the stress ratio of alternating stresses. The numerical study indicated that the straight, turn uphill, and turn downward tracks could exaggerate the stress generated due to dynamic loading. Potential fatigue failure could occur because the dynamic load produced fluctuating stresses, either alternating or mean stresses, that could damage the structural integrity of the flat wagon.

Analisis Efektivitas Pelatihan Singkat 3D Modelling, 3D Scanning, dan 3D Printing pada Siswa SMA Achmad Syaifudin; Muhammad Khoirul Effendi; Agus Sigit Pramono; Yusuf Kaelani; Julendra Bambang Ariatedja; Dinny Harnany; Yohanes
Sewagati Vol 6 No 5 (2022)
Publisher : Pusat Publikasi ITS

Pada era revolusi industri 4.0, teknologi cetak tiga dimensi (3D printing) sedang berkembang pesat. Di Taiwan dan Korea Selatan, siswa sekolah menengah telah memiliki kemampuan menjalankan 3D printing. Sebaliknya di Indonesia, lulusan sekolah menengah belum memiliki kompetensi sejenis. Oleh sebab itu, tim Pengabdian Masyarakat dari departemen Teknik Mesin ITS memberikan pengenalan dasar teknologi cetak 3D untuk meningkatkan kompetensi siswa sekolah menengah. Pelatihan ini diberikan secara singkat kepada 29 siswa SMAN 1 Boyolangu, Tulungagung dengan persentase 25% berupa pemberian teori dasar dan 75% berupa praktik mengerjakan proses 3D modelling-scanning-printing. Berdasarkan analisis kuantitatif, pemahaman peserta meningkat sebesar 35.05% untuk materi 3D modelling dan 22.55% untuk materi 3D scanning dan printing. Adapun berdasarkan analisis kualitatif, hasil pencetakan produk 3D dengan metode 3D printing yang dikerjakan oleh peserta sudah cukup bagus. Hal ini menunjukkan bahwa kegiatan pelatihan singkat selama dua hari mampu meningkatkan kompetensi siswa SMA dalam memahami dasar teknologi manufaktur 3D printing.

Evaluation of Crash Energy Management of the First-Developed High-Speed Train in Indonesia Karisma Rizal; Achmad Syaifudin
Journal of Engineering and Technological Sciences Vol. 55 No. 3 (2023)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2023.55.3.2

Crash energy management is an essential evaluation stage of passive safety systems for high-speed trains. As a part of crash energy management, crash energy absorption has been researched for the last decade. The development of its components has also been performed individually. This paper presents a numerical analysis of the configuration of an energy absorption system for high-speed trains developed in Indonesia. Three placement configurations of the energy absorption system were investigated using explicit dynamic analysis in ANSYS. Total energy absorption, deceleration pulse, and deformation length were considered in the evaluation of the numerical analysis results. The collision criteria used in this study were according to EN 15227 and CFR 238 standards. This study revealed that the existing design could fulfill the energy absorption and average deceleration pulse required by EN 15227. Nevertheless, the existing design could not fulfill the energy absorption and maximum deceleration pulse required by CFR 238. It was also indicated that by positioning the anti-climber slightly forward, changing the deformation force of the crush box, and adding an impactor, the quality of energy absorption and average deceleration pulse could be improved.

Co-Authors Abdul Rohman Farid Agus Sigit Pramono Andhika Muttaqien Priyambodo Betti Mawar Kalista Dinny Harnany Faisal Rahman I Nyoman Sutantra Julendra Bambang Ariatedja Karisma Rizal Katsuhiko Sasaki Katsuhiko Sasaki Lanang Wahyu Pamungkas Muhammad Khoirul Effendi Ryo Takeda Ryo Takeda Teguh Suprianto Windharto, Agus Yohanes Yukiko Tomooka Yusuf Kaelani

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