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All Journal Jurnal Dedikasi SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Rekayasa Mesin R.E.M (Rekyasa Energi Manufaktur) Jurnal Turbo : Jurnal Program Studi Teknik Mesin JTTM: Jurnal Terapan Teknik Mesin Jurnal Mesin Nusantara ARMATUR : Artikel Teknik Mesin dan Manufaktur Seminar Nasional Hasil Riset dan Pengabdian (SNHRP) Indonesian Journal of Innovation Studies PELS (Procedia of Engineering and Life Science) Procedia of Social Sciences and Humanities eProceedings of Management Prosiding SEMNAS INOTEK (Seminar Nasional Inovasi Teknologi) Innovative Technologica: Methodical Research Journal Journal for Technology and Science Journal of Aerospace Systems and Engineering Innovations Academia Open
Rachmat Firdaus
Program Studi Teknik Mesin, Universitas Muhammadiyah Sidoarjo
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Transportation Other

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Analisis Nilai Elongasi Material Terhadap Cracksheet Pada Proses Deep drawing Nozzle pada Unit Evaporator bhima endra wira yudha; Ali Akbar; Rachmat Firdaus; Mulyadi Mulyadi
TURBO [Tulisan Riset Berbasis Online] Vol 14 No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i2.4401

Abstract

Penelitian ini bertujuan menganalisis nilai elongasi pada material Galvanized (DX51D, DX54D, DX53D) dan Stainless Steel (SUS304, SUS316, SUS441) sebagai parameter utama dalam proses deep drawing nozzle unit evaporator. Uji tarik dilakukan untuk menentukan kemampuan deformasi plastis tanpa menyebabkan keretakan, serta pencarian indikasi cracksheet yang dapat terjadi selama proses pembentukan. Hasil menunjukkan bahwa material stainless steel, khususnya SUS304 dan SUS441, memiliki nilai elongasi tertinggi sebesar 45%, menunjukkan ketahanan unggul terhadap deformasi ekstrem. Sementara itu, DX54D menjadi galvanis dengan elongasi tertinggi (36%) dan tidak mengalami retak saat deep drawing, berbeda dengan DX51D dan DX53D yang menunjukkan gejala cracksheet. Batas elongasi minimum untuk menghindari kegagalan struktural pada deep drawing ditentukan sekitar 30%. Pemilihan material dengan elongasi tinggi serta optimalisasi parameter proses menjadi krusial dalam menjamin kualitas dan efisiensi produksi. Hasil ini memberikan dasar untuk menentukan material optimal berdasarkan kombinasi performa teknis dan efisiensi biaya.
Analisis Pengaruh Variasi Bentuk Sudden Enlargement terhadap Head Loss pada Aliran Udara Laminar Satria Agung Wibisono; Ali Akbar; A’rasy Fahruddin; Rachmat Firdaus; Muhammad Syahril
Jurnal Mesin Nusantara Vol 8 No 2 (2025): Jurnal Mesin Nusantara
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/jmn.v8i2.24788

Abstract

Fenomena sudden enlargement pada sistem perpipaan merupakan salah satu penyebab utama terjadinya head loss yang dapat menurunkan efisiensi aliran fluida. Penelitian ini bertujuan untuk menganalisis pengaruh variasi bentuk sudden enlargement terhadap kehilangan energi pada aliran fluida laminar dengan menggunakan tiga variasi geometri, yaitu Square Edge, Rounded Edge, dan Projecting Edge. Pengujian dilakukan pada pipa berbahan akrilik menggunakan manometer U sebagai alat ukur tekanan dengan dua titik pengukuran, masing-masing pada diameter 12,7 mm dan 50 mm. Dua tingkat laju aliran udara diuji, yaitu 6 L/menit dan 4 L/menit. Data tekanan yang diperoleh diolah untuk menghitung kecepatan aliran dan head loss menggunakan persamaan dasar fluida. Hasil penelitian menunjukkan bahwa bentuk geometri memiliki pengaruh signifikan terhadap besarnya head loss. Pada laju aliran tinggi (6 L/menit), geometri Square Edge menghasilkan head loss terendah, sedangkan Rounded Edge memberikan performa optimal pada laju aliran rendah (4 L/menit). Geometri Projecting Edge secara konsisten menghasilkan head loss tertinggi pada kedua kondisi. Temuan ini menunjukkan bahwa pemilihan geometri sudden enlargement harus disesuaikan dengan kondisi operasi sistem. Penelitian ini diharapkan dapat menjadi referensi dalam perancangan instalasi perpipaan yang lebih efisien dan mendukung optimasi energi pada sistem transportasi fluida.
CFD Simulation Reveals Pressure Drop in Pipe Flow System: Simulasi CFD Mengungkap Penurunan Tekanan pada Sistem Aliran Pipa Muhamad Ridwan Yunus; Ali Akbar; Rachmat Firdaus; Metatia Intan \ Mauliana
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2111

Abstract

General Background Fluid flow analysis in piping systems is essential for understanding energy losses and system performance in engineering applications. Specific Background Computational Fluid Dynamics (CFD) has been widely applied to simulate fluid behavior and pressure distribution in complex pipe geometries. Knowledge Gap However, detailed analysis of flow characteristics and pressure drop in specific pipe configurations, particularly at bends, remains limited. Aims This study aims to analyze fluid flow patterns and pressure drop in a piping system using CFD simulation. Results The results show that pressure drop increases with higher flow velocity and is significantly affected by pipe geometry, especially at bends where turbulence and vortex formation occur. Flow visualization indicates non-uniform pressure distribution and localized energy losses. Novelty This study provides detailed numerical insight into the interaction between flow velocity and pipe geometry using CFD visualization. Implications The findings can support the optimization of piping system design to reduce energy losses and improve operational efficiency. Keywords: Computational Fluid Dynamics, Pressure Drop, Pipe Flow, Fluid Simulation, Turbulence Key Findings Highlights Increased velocity intensifies energy loss along piping sections Flow separation appears prominently in curved geometry regions Numerical visualization clarifies localized pressure distribution patterns
RCM II Identifies Critical GTG Components and Maintenance Strategy: RCM II Mengidentifikasi Komponen GTG yang Kritis dan Strategi Pemeliharaan Raihan Maulana Zulfikar; Rachmat Firdaus
Indonesian Journal of Innovation Studies Vol. 26 No. 4 (2025): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v26i4.2131

Abstract

General Background: Gas Turbine Generator systems play a critical role in industrial power generation, where failures can cause significant operational and safety risks. Specific Background: Conventional maintenance strategies are often reactive and fail to prioritize component criticality, leading to inefficient resource allocation. Knowledge Gap: There is limited application of structured Reliability Centered Maintenance II integrated with Failure Mode and Effects Analysis to systematically identify failure risks and optimize maintenance strategies in GTG systems. Aims: This study aims to apply RCM II to determine critical components, analyze failure modes using FMEA, and define appropriate maintenance strategies based on risk levels. Results: The analysis identifies key components such as the compressor and combustion system as high-priority failure modes, with RPN values reaching 360 and 336 respectively. Other components fall into medium and low priority categories. Maintenance strategies are classified into proactive tasks using RCM II, simple FMEA-based actions, and run-to-failure approaches. Novelty: The study integrates RCM II decision diagrams with detailed RPN-based prioritization for GTG maintenance planning. Implications: The findings provide practical guidance for improving maintenance efficiency, optimizing labor allocation, and supporting reliable operation in industrial energy systems. Keywords: RCM II, Gas Turbine Generator, FMEA Analysis, Risk Priority Number, Maintenance Strategy Key Findings Highlights Risk evaluation highlighted dominant failure contributors in power generation unit Structured prioritization grouped components into three maintenance categories Decision-based tasks defined preventive and corrective operational actions
Handling Problematic Dimensions in Bush Ymh 2dp-1 Production: Penanganan Dimensi Bermasalah Pada Produksi CNC Part Bush Ymh 2dp-1 Dhimas Wahyu Dwi Septian; Rachmat Firdaus
Procedia of Engineering and Life Science Vol. 10 No. 1 (2026): Proceedings of the 9th Seminar Nasional Sains 2026
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/g1zzvc20

Abstract

CNC (Computer Numerical Control) is a machine tool with an automation system that is operated by commands with programs and fast production results, high levels of precision and efficient work. The method used in this research is direct observation in the field according to the existing problems. The aim of the research on Handling Problematic Dimensions in the Production of CNC Part YMP 2DP-1 is to find out the procedures and methods used to overcome the problem of problematic or broken dimensions in the production of CNC machine items Bush YMP 2DP-1, namely by adding a repair program to the CNC machine, replacing work instructions, and replacing better or more precise measuring tools.
Prototype Energy Saving Car Chassis Design and Analysis Using 6061 Aluminum Material : Perancangan Desain dan Analisa Chassis Mobil Hemat Energi Tipe Prototype dengan Material Aluminium 6061 Eka Adji Pangestu; A'rasy Fahruddin; Ali Akbar; Rachmat Firdaus; Iswanto; Nia Nuraeni Suryaman
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 9 No 2 (2024): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v9i2.1706

Abstract

The chassis is an important component car which functions to support the load on the vehicle and has a strong construction. The chassis, as the main support for all vehicle componentsy. Increased fuel use and rising global crude oil prices have encouraged research into energy saving cars with special designs that can reduce fuel consumption and pollutant emissions. The design process with variations in rollbar shape and variations in cross sectional shape with 6061 aluminum material using Autodesk Inventor 2024 software. After the design process is complete, stress analysis test stage is carried out to obtain analysis data, namely von misses stress, strain, displacement, safety factor. The results of the chassis design using concept B with a pipe cross-sectional shape and rollbar fillet model are more recommended, because it has better von Mises stress value and a better safety factor, besides that the concept B chassis design is easier in the assembly process with prototype type energy efficient car body.
Co-Authors A'rasy Fahruddin Afif , Muhammad Syauqi Ahmad Ahfas Ajitiyo Dananjoyo Akhmad Akhirudin Alfiansyah Satrio Wicaksono Ali Akbar Ali Akbar Ali Akbar Annisa Nurbaiti Aziz, Eriq Helmy Barafi, Keigant Abdullah bhima endra wira yudha Deannes Isynuwardhana Dhimas Wahyu Dwi Septian Diyas Robikh Arafat Edi Widodo Edi Widodo Efendi, Muchammad Eka Adji Pangestu Ferdiansyah, Faris Fernanda, Ardhi Shefta Firdaus , Muhamad Hamzah Setiawan Huesein, Wa Ode Asma’ul Husna Iqlima, Anita Rahma Nur Irfan Dwi Farilla Iswanto Iswanto Metatia Intan Mauliana Metatia Intan \ Mauliana Mochammad Nur Rizki Mohamad Affan Rahmadin Mohammad Afif Fajar Mohammad Dani Iswanto Muhamad Ridwan Yunus Muhammad Ibrahim Muhammad Iqbal Nur Fadillah Muhammad Syahril Muhammad Zainal Abidin MULYADI Mulyadi Mulyadi Mulyadi Mulyadi Nia Nuraeni Suryaman Nur Afif Rozikin Paramitha Amelia Kusumawardani Perbawa, Dafva Ari Prantasi Harmi Tjahjanti Prasetya, Fikri Putra , Ahmad Nurwanda Bawono Rachmadani, Dhaniar Gumelang Rahmania Sri Untari Raihan Maulana Zulfikar Rangga Bayu Ribangun Bamban Jakaria Rizky Dwi Aldiantofas Sari, Ghulam Muhammad Abdu Satria Agung Wibisono Shodiq, Ja’far Siti Cholifah Wahid , M. Luqman Waluyo, Satrio Wijaya, Yanuar Eka wira yudha, bhima endra Yulianto, Achmad Irfan