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Pengaruh Variasi Bentuk Permukaan Forging Dan Suhu Preheat Terhadap Kekuatan Tarik Friction Welding Dimas Adi Perwira; Henry Widya Prasetya
Virtual of Mechanical Engineering Article Vol 5 No 2 (2020): V-MAC
Publisher : Prodi Teknik Mesin Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/v-mac.v5i2.1068

Most of the railway facilities use steel as the constituent material. The method of joining (joining methods) of steel materials, especially in the railroad industry, the most widely used is the welding technique (welding) so that knowledge of the welding process is very important for welding enginers and metallurgists as well as for designers, fabricators, users of welding results. The purpose of this study was to determine the tensile strength of the joint resulting from the friction welding method with variations in the shape of the forging surface and preheat temperature. The shape of the forging surface is 8 mm, 10 mm and 12 mm. Variations in preheat temperature of 200 C, 400 C and 600 C. The results showed the highest tensile strength of the friction weld joint with an average tensile stress value of 407, 48 MPa on the forging surface shape of 12 mm and a preheat temperature of 600 C. And the tensile strength of the joint The lowest friction welding with an average tensile stress value of 120 MPa on the forging surface shape of 8 mm and a preheat temperature of 200 C. Keyword: friction welding, forgings, preheat temperature

Pengaruh Variasi Diameter Filler Dan Kuat Arus Terhadap Kekuatan Tarik Hasil Pengelasan SMAW Material Stainless Steel 304 Dimas Adi Perwira; Henry Widya Prasetya; Muh. Adib Kurniawan
Virtual of Mechanical Engineering Article Vol 6 No 2 (2021): V-MAC
Publisher : Prodi Teknik Mesin Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/v-mac.v6i2.1519

One of the railway facilities uses stainless steel as the main construction material. The method of joining stainless steel materials, especially the most widely used is the SMAW welding technique. The purpose of this study was to determine the tensile strength of SMAW welding joints on stainless steel 304 material with variations in diameter of rod filler as filler material an d variations in current from DC inverter electric welding machine. The diameter of rod filler as filler material is 1 mm, 2 mm and 3 mm. The variation of the current of the DC inverter of the electric welding machine is 70 A, 100 A and 120 A. The results show the highest tensile strength of the 304 stainless steel welded connection with an average tensile stress of 34.48 MPa on the current electric welding inverter. 120 A is used and the diameter of the rod filler is 2 mm. And the tensile strength of the welding connection of the 304 stainless steel material is the lowest with an average tensile stress of 17.01 MPa at the electric welding inverter current used is 70 A and the diameter of the rod filler is 3 mm.Keyword: SMAW welding, filler, current and stainless steel

Kekasaran Permukaan Proses Pembubutan Dry Dan Wet Process Baja ST 90 Dengan Insert Carbide Dimas Adi Perwira; Henry Widya Prasetya; Affan Nur Roja Jendra Prakoso
Virtual of Mechanical Engineering Article Vol 7 No 2 (2022): V-MAC
Publisher : Prodi Teknik Mesin Universitas PGRI Banyuwangi

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

Abstract Railway components especially for parts of that often occur friction and resist when there is a pulling or pushing must have a low roughness to reduce the occurrence wear caused by frictioning and as an indicator good or bad quality of a product. The purpose of this study is to know the effect of roughness level of cutting parameter variation, wet process manufacturing method variation, dry process and nose radius variations of chisel lathe 0.4, 0.8 in the ST 90 The method used in this study is experimental. The independent variables in this study were variations in cutting parameters, nose radius of the tool, and working methods. In cutting parameters, spindle rotational speed (540 Rpm, 800 Rpm, 1500 Rpm), feed speed (0.226 mm/revolution), depth of cut (2 mm) and for nose radius using 0.4 mm and 0.8 mm, there are also variations in wet working methods. process and dry process. After testing is carried out, it shows that on the ST 90 with the wet process working method and nose radius 0.8 turning variation with spindle rotation speed of 1500 Rpm, depth of cut 2 mm, feed speed 0.226 mm/rev has a roughness value of 2.625 µm. Meanwhile, for the highest level of roughness, using the dry process method and chisel nose radius 0.4 with a turning speed of 540 Rpm, a cutting depth of 2 mm, a feed speed of 0.226 mm/rev having a roughness value of 9.223 µm. Keyword: Insert w-series, Wet process, Dry process, Surface roughness.

Perencanaan Perawatan Motor Penggerak Wesel Type T84M dengan Menggunakan Metode RCM (Reliability Centered Maintenance) di Daop 2 Bandung Arief Darmawan; Dimas Adi Perwira; Edi Nyoto Setyo Marsusiadi; Else Frida Sukresnawati; Arum Putri Maharani
AL-MIKRAJ Jurnal Studi Islam dan Humaniora Vol 4 No 1 (2023): Al-Mikraj, Jurnal Studi Islam dan Humaniora
Publisher : Pascasarjana Institut Agama Islam Sunan Giri Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37680/almikraj.v4i1.3844

Daop 2 Bandung is one of the train operational areas where each station has a signaling system to maintain safety and regulate train operations so that they remain effective and efficient. This research aims to determine the maintenance planning system for the Type T84M Wesel Drive Motor using the RCM (Reliability Centered Maintenance) method in Daop 2 Bandung. The method used is RCM (Reliability Centered Maintenance) which focuses on secondary data in the form of historical data on disturbances on the T84M draft motorbike which is used to calculate maintenance time intervals based on the results of data distribution for each component according to the RCM (Reliability Centered Maintenance) method. The research results show that the appropriate maintenance tasks for wesel motor components are scheduled disposal tasks and scheduled restoration tasks. The T84M draft motorbike has a reliability value of 43.2% and an availability value of 99% and the recommended maintenance interval for the T84M draft motorbike is 3 days.

Analysis of Optimum Speed of ROLA Transportation with Flat Cars (GD 400910) on the Minimum Curve of the PPI Madiun Track Using Universal Mechanism Software Dadang Sanjaya Atmaja; Mohamad Imron Mustajib; Dimas Adi Perwira; Ilham Satrio Utomo; Henry Widya Prasetya; Destika Riski Putrihastiaji; Izza Anwer
Journal of Railway Transportation and Technology Vol. 5 No. 1 (2026): March
Publisher : Politeknik Perkeretaapian Indonesia Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37367/jrtt.v5i1.70

An innovative solution for low-emission and environmentally friendly freight transport is the Rollende Landstraße (ROLA) train. Research at the Indonesian Railway Polytechnic (PPI) in Madiun conducted dynamic simulations to analyze safe operating speeds when crossing minimum curved tracks with a radius of 42 meters to prevent derailment. The simulation results show that the optimal speed limit for ROLA transport is 14 km/h for fully loaded trucks, 17 km/h for half-loaded trucks, and 19 km/h for unloaded trucks. This speed must be maintained constantly when passing through curves to ensure safety and comfort.

Improving Students' English Competence through TOEFL Preparation Program for Vocational College Students Damar Isti Pratiwi; Andesvan Gumay; Dimas Adi Perwira; Kiki Juli Anggoro
Abdimas Awang Long Vol. 9 No. 2 (2026): Juni, Abdimas Awang Long
Publisher : Sekolah Tinggi Ilmu Hukum Awang Long

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56301/awal.v9i2.2083

Global growth necessitates that students achieve proficiency in English as a requisite competency for graduation. Proficiency in English must be demonstrated with a certificate, such as a TOEFL certificate, with a minimum needed score. This prerequisite was problematic for non-English major students, as they had only studied English in the initial semester. Nonetheless, the requirement was in the last semester. Consequently, a community service program in the form of a TOEFL preparation program was essential for equipping students with the requisite English abilities to achieve a passing score. Following the dissemination of the data, the participants in this activity comprised 228 third-grade students from a vocational university in Indonesia. The program comprised two weeks and included a pretest, an introduction, training (including listening comprehension, structure and written expression, and reading comprehension), a posttest, and a survey. The activity’s findings indicated that the program improved students’ TOEFL scores relative to their original scores. However, a number of students have failed to meet the minimum required score. It is recommended that the community service program be conducted periodically to aid students in enhancing their English skills.

Perencanaan Perawatan Motor Penggerak Wesel Type T84M dengan Menggunakan Metode RCM (Reliability Centered Maintenance) di Daop 2 Bandung Arief Darmawan; Dimas Adi Perwira; Edi Nyoto Setyo Marsusiadi; Else Frida Sukresnawati; Arum Putri Maharani
AL-MIKRAJ Jurnal Studi Islam dan Humaniora (E-ISSN 2745-4584) Vol. 4 No. 1 (2023): AL-Mikraj Jurnal Studi Islam dan Humaniora
Publisher : Pascasarjana Institut Agama Islam Sunan Giri Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37680/almikraj.v4i1.3844

Daop 2 Bandung is one of the train operational areas where each station has a signaling system to maintain safety and regulate train operations so that they remain effective and efficient. This research aims to determine the maintenance planning system for the Type T84M Wesel Drive Motor using the RCM (Reliability Centered Maintenance) method in Daop 2 Bandung. The method used is RCM (Reliability Centered Maintenance) which focuses on secondary data in the form of historical data on disturbances on the T84M draft motorbike which is used to calculate maintenance time intervals based on the results of data distribution for each component according to the RCM (Reliability Centered Maintenance) method. The research results show that the appropriate maintenance tasks for wesel motor components are scheduled disposal tasks and scheduled restoration tasks. The T84M draft motorbike has a reliability value of 43.2% and an availability value of 99% and the recommended maintenance interval for the T84M draft motorbike is 3 days.

Kampanye Keselamatan di Perlintasan Sebidang Melalui Media Digital dan Media Sosial Handoko Handoko; Dedik Tri Istiantara; Dadang Sanjaya; Dimas Adi Perwira; Marcelinus Yudha Dozeanda
Karya Nyata : Jurnal Pengabdian kepada Masyarakat Vol. 3 No. 3 (2026): September : Karya Nyata : Jurnal Pengabdian kepada Masyarakat
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/karyanyata.v3i3.3599

Safety at level crossings remains a significant concern in the railway transportation system due to the high risk of accidents influenced by road user behavior, infrastructure conditions, and the limited reach of conventional safety outreach. This community service initiative aimed to develop a level-crossing safety campaign through digital and social media to broaden the reach of safety education and enhance public safety literacy. The program was implemented in four stages: preparation, data collection and material development, content production and publication, and evaluation and reporting. Data were obtained through a documentary review of accident data and relevant regulations, complemented by observations at several level crossings in Madiun and Semarang. The campaign produced five pieces of content, comprising two articles published on Kompasiana and Kumparan and three educational videos on TikTok. The results showed that the content collectively reached more than 10,000 viewers, with the video “Menerobos di Perlintasan Sebidang” achieving the highest reach of more than 7,000 viewers. These findings indicate that a multiplatform and multiformat strategy can rapidly expand the dissemination of safety messages through complementary communication channels. However, changes in public understanding and behavior could not be fully measured because the evaluation remained predominantly based on content-reach indicators. This approach may serve as a strategic alternative for supporting evidence-based public education on compliance and safety at level crossings.

Road Attributes and Traffic Characteristics Effects on Motorcycle Safety Arumdyah Widiati; I Made Sukmayasa; Dimas Adi Perwira; Azwan Ezzany Azmi; Mukhammad Rizka Fahmi Amrozi
Journal of Railway Transportation and Technology Vol. 4 No. 2 (2025): November
Publisher : Politeknik Perkeretaapian Indonesia Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37367/jrtt.v4i2.77

In Indonesia, motorcycles dominate the transport landscape, with over 125 million registered motorcycles as of 2025. The country faces a significant road safety challenge, recording over 31,000 road traffic deaths annually, with motorcycles involved in many fatal crashes. Infrastructure-based interventions have shown promise in mitigating these risks. However, the implementation remains uneven, and effectiveness varies by region. Therefore, a systematic assessment of the influence of road conditions on motorcycle safety and evaluating the impact of infrastructure-based countermeasures in reducing crash risk and injury severity is needed. This study aims to systematically assess the road safety risk for motorcyclists in campus areas, with a specific focus on the role of local road attributes and traffic characteristics to propose suitable infrastructure-based countermeasures in reducing crash risk and injury severity. The method used is a road assessment tool developed by the International Road Assessment Programme (iRAP). The results show that The road attributes that play the most crucial role in determining the SRS value for a motorcycle on a road segment in the UGM campus area are those that contribute to accident likelihood: curvature, median transversability, and operating speed. Although previous research has shown operating speed to be a mediating variable rather than a direct factor in accident occurrence, it is essential to consider the factors that contribute to accidents. For intersections, the road attributes that significantly determine the level of safety are those that influence the likelihood and severity. The road attributes that influence likelihood are curvature, intersection quality, channelization, and property access points. The road attributes that influence severity are roadside severity – distance, paved shoulder width, and property access points.

Effect of Tool Pin Diameter on the Tensile Strength of Friction Stir Welded AA6061 Joints: Implications for Railway Carbodies Henry Widya Prasetya; Dadang Sanjaya Atmaja; I Made Agus Putrawan; Dimas Adi Perwira; Ilham Satrio Utomo; Moch Aziz Kurniawan
Journal of Railway Transportation and Technology Vol. 5 No. 2 (2026): November
Publisher : Politeknik Perkeretaapian Indonesia Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37367/jrtt.v5i2.99

Friction stir welding (FSW) is a solid-state joining process that is increasingly used to fabricate aluminum railway carbodies. This study examined the effect of tool pin diameter on the tensile properties of FSW joints in 6 mm thick AA6061-T6 aluminum plates. High-speed steel tools with a 13 mm flat shoulder and straight cylindrical pins of 3, 4, and 5 mm diameter were fabricated by turning, and butt joints were welded on a conventional milling machine at a rotational speed of 1130 rpm, a traverse speed of 20 mm/min, and a tilt angle of 3°. Three joints were produced for each pin diameter (n = 3), and one transverse tensile specimen was tested from each joint. Results are reported as mean ± standard deviation and were analyzed using one-way ANOVA, the Kruskal–Wallis test, and Spearman’s rank correlation. The mean tensile strength decreased from 210.06 ± 5.87 MPa with the 3 mm pin to 190.96 ± 26.57 MPa and 146.36 ± 62.26 MPa with the 4 and 5 mm pins, respectively, while the scatter increased with pin diameter. Owing to the small sample size and large scatter, the differences among group means were not statistically significant (p = 0.206); however, pin diameter was negatively correlated with tensile strength (ρ = −0.74, p = 0.023). Visual inspection revealed less weld flash with the 3 mm pin, consistent with the smaller volume of material displaced by the pin. Within the tested range, the 3 mm pin provided the highest and most consistent tensile strength.

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