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All Journal Simetris Jurnal Rekavasi Rekayasa Mesin Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) VANOS Journal of Mechanical Engineering Education JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Jurnal Pensil : Pendidikan Teknik Sipil Jurnal Kajian Ilmiah
Antonius, Dikky
Universitas Kristen Indonesia
Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences Other

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STUDI KASUS IDENTIFIKASI KERUSAKKAN MESIN BERDASARKAN SINYAL GETARAN Ramses Yohannes Hutahaean; Dikky Antonius
Jurnal Rekayasa Mesin Vol. 13 No. 2 (2022)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v13i2.761

Abstract

The machine maintenance strategy is very important in manufacturing, mining, and other industries so an appropriate maintenance strategy is needed based on industrial operating conditions. In this paper, a Proactive maintenance strategy is presented, in which this strategy requires the identification of vibrations, and the identification of vibrations is divided into two methods, there are the identification of vibrations in the time domain and the identification of vibrations based on the frequency domain. Identification in the time domain is usually done in analyzing gears because of so much noise in the frequency domain, while identification in the frequency domain is used to analyze vibrations in cases of unbalance, misalignment, bearing defects, cavitation, and damage to electric motors. This paper briefly presents the time domain and frequency domain differences and two case studies that happened on PT. Freeport Indonesia. The first case is the investigation of bearing damage to the conveyor using vibration signals in the frequency domain, while the second case is the investigation of gear damage using the time domain that occurs in the crusher.
ANALISA TEMPERATUR TEMPER TERHADAP STRUKTUR MIKRO DAN SIFAT MEKANIK BAJA KARBON SEDANG S45C UNTUK JIG Partomuan, Daniel; Budiarto; Antonius , Dikky
Jurnal Rekavasi Vol 12 No 1 (2024)
Publisher : Prodi Teknik Industri, Universitas AKPRIND Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/rekavasi.v12i1.4717

Abstract

Untuk memilih proses perlakuan panas yang tepat untuk aplikasi industri baja karbon medium S45C, perlu diketahui pengaruh parameter teknologi selama proses perlakuan panas seperti suhu pemanasan, waktu penahanan dan media pendingin terhadap struktur mikro dan sifat mekanik. Penelitian ini tujuan untuk menganalisa pengaruh temperatur temper terhadap struktur mikro dan sifat mekanik pada baja karbon sedang S45C  sebagai material JIG. Menggunakan metode eksperimen, berupa perlakuan panas pada fasa austenit temperatur 825OC waktu penahanan 30 menit, dicelup cepat pada media oli, dan dilanjutkan variasi temperatur temper 200 OC, 250 OC, dan 300 OC serta waktu tahan 30 menit. Pengujian ukuran kristal, kerapatan dislokasi, dan regangan mikro kisi menggunakan difraktometer sina-X (XRD) dihitung menggunakan persamaan Derby Schrerre, dan uji kekerasan dengan skala Brinell. Hasil analisa struktur mikro menunjukkan bahwa rerata ukuran kristal mengalami kenaikan yang signifikan setelah proses pemanasan mulai dari fase austenit, dicelup cepat media oli dan ditemper. Namun untuk kerapatan dislokasi dan regangan mikro kisi mengalami penurunan. Hasil uji kekerasan dan kuat tarik memperlihatkan kenaikan dengan temperatur temper ditambahkan
ANALYSIS THE INFLUENCE OF VARIATION SHEAR REINFORCEMENT SPACING IN REINFORCED CONCRETE BEAM TESTING Tampubolon, Sudarno P; Antonius, Dikky
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 13 No. 2 (2024): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v13i2.44068

Abstract

Beams are crucial components of a building structure that require attention during the design phase. Several failures in beams occur due to inadequate installation of reinforcement according to the planned procedures or designs, which can lead to structural failures. Based on the analysis and testing of three reinforced concrete beams B1, B2, and B3 conducted in the laboratory, the maximum axial compressive strength obtained is 125 kN and the flexural tensile strength is 5.56 MPa. The deflection values observed for beam B1 7.05 mm, beam B2 8.4 mm, and beam B3 18.75 mm. The crack widths observed for beam B1 range from 0.1 to 0.4 cm, beam B2 range from 0.1 to 5 cm, and beam B3 range from 0.1 to 12 cm. Deflection values and crack patterns/failure modes observed in reinforced concrete beams B1, B2, and B3, it is evident that the most significant failure patterns occur in Beam B3 with a stirrup spacing @200mm compared to stirrup spacings @100mm and @150 mm. The use of 45° hooks on stirrups results in diagonal failure in beams. This is attributed to the strong bond between the concrete and the installed reinforcement, thereby interlocking with each other.
Workload Analysis in Determining the Number of Workers Handling Delivery of Brake Master Cylinder Products at Company X Sesmaro Max Yuda; Rocky Rocky; Dikky Antonius
VANOS Journal of Mechanical Engineering Education Vol 9, No 2 (2024)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/vanos.v9i2.28653

Abstract

Company X is one of the largest automotive companies engaged in manufacturing in Indonesia. In company X, there is a section for shipping finished goods/products called the handling delivery section. In this research, a time study was carried out using the stopwatch time study method to obtain standard time, workload, and number of workers to complete the delivery handling process. From the analysis results, it was found that the average working time for PMH hand pallet activities was 327.92 seconds, and PMH forklift was 167.623 seconds. Then, based on working time/worker/day of 420 minutes or 25,200 seconds, with 438 product deliveries per day, the workload of five workers experienced an excess of PMH hand pallet 113.991% and PMH forklift 145.67%. With the addition of one worker for PMH hand pallet, and one worker for PMH forklift, the workload is not excessive, namely 94.99% for PMH hand pallet and 97.10% for PMH forklift.
Damage Analysis and Repair of a Small-Scale ORC (Organic Rankine Cycle) Prototype Turbine During Testing Siburian, Rivaldo; Antonius, Dikky; Abadi , Surjo
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 9 No. 1 (2025): June 2025 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v9i1.12316

Abstract

This research discusses the damage analysis and repair of an Organic Rankine Cycle (ORC) prototype turbine that experienced failure during testing. The damage occurred due to a collision between the rotor blades and stator blades, causing the rotor blade to break. The primary cause was identified as a manufacturing error in the turbine stator, where the flange holes were misaligned with the shaft. Additionally, the use of improper locking flange bolts and loose fitting on the coupling and stator shaft contributed to this issue. The research methodology included failure analysis using Process Failure Modes and Effects Analysis (PFMEA) to identify potential failures and prioritize corrective actions. The results indicate that adjustments in the manufacturing process, the use of high-precision measurement technology, improved material quality control, and better technician training can significantly reduce the risk of future failures. Furthermore, evaluating operational conditions and conducting regular inspections are recommended to ensure optimal turbine performance. With the implementation of these corrective actions, the ORC turbine prototype is expected to operate more reliably and efficiently during testing and use. This research is expected to make a significant contribution to enhancing the reliability and efficiency of ORC system turbines, and provide guidance for the future development and testing of turbines.
Co-Authors Abadi , Surjo Alexander Gede Lucky Krisnamurti Atmadi, Priyono Benedigtus Tito Brillian Ardiana Putra Budiarto Budiarto Budiarto Budiarto Cyrillus Pandu Dian Permata Putri Dimitrij Chrisna Al Franzleon Kimar Turnip Medyawanti Pane Partomuan, Daniel Pratama, Rakha Anugrah Priyono Atmadi Priyono Atmadi Putra , Brillian Ardiana Ramses Yohannes Hutahaean Regi Megantara Rocky Rocky Sesmaro Max Yuda Siburian, Rivaldo Stepanus Stepanus Sudarno P Tampubolon