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All Journal JMES The International Journal of Mechanical Engineering and Sciences Sewagati
Julendra Bambang Ariatedja
Departemen Teknik Mesin, Institut Teknologi Sepuluh Nopember, Kampus ITS, Keputih, Sukolilo, Surabaya 60111
Arts Humanities Education Energy Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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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

Abstract

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (774.522 KB) | DOI: 10.12962/j26139960.v6i5.283

Abstract

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.
Co-Authors Abdul Rohman Farid Achmad Syaifudin Agus Sigit Pramono Dinny Harnany Lanang Wahyu Pamungkas Muhammad Khoirul Effendi Teguh Suprianto Yohanes Yusuf Kaelani