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Teng Sutrisno
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Gedung P lantai 5, Universitas Kristen Petra Jl. Siwalankerto 121-131, Surabaya, Jawa Timur 60236, Indonesia.
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INDONESIA
Jurnal Teknik Mesin
Published by Universitas Kristen Petra Surabaya
ISSN : 14109867     EISSN : 26563290     DOI : https://doi.org/10.9744/jtm
Core Subject : Science, Engineering,
Aerospace Engineering Automotive Engineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Jurnal Teknik Mesin (JTM) merupakan Jurnal Keilmuan dan Terapan Teknik Mesin yang dikelola oleh Program Studi Teknik Mesin, Fakultas Teknologi Industri, Universitas Kristen Petra. JTM terbit pertama pada April 1999. JTM telah mendapatkan akreditasi Jurnal Nasional oleh Dirjen Dikti Depdiknas dengan SK-Nomor: 02/Dikti/Kep/2002, SK-Nomor :43/DIKTI/Kep/2008. JTM diterbitkan setiap bulan April dan Oktober. Tujuan penerbitan jurnal ini antara lain adalah untuk: Menyebarluaskan pengetahuan, pengalaman/terapan dan temuan baru para ilmuwan atau praktisi di bidang teknik mesin. Meningkatkan motivasi para ilmuwan dan praktisi untuk melakukan penelitian dan pengembangan ilmu di bidang teknik mesin
Arjuna Subject : Energi (semua kategori) - Energi (Lain-Lain)
Articles 302 Documents
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Bioethanol Characteristics of Musa Paradisiaca Artocarpus Peel Muhaji Muhaji; I Made Arsana; Belina Yunitasari
Jurnal Teknik Mesin (Sinta 3) Vol. 22 No. 1 (2025): APRIL 2025 (SINTA 3)
Publisher : Institute of Research and Community Outreach, Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jtm.22.1.39-50

Abstract

The objectives of this research are to analyze the chemical and physical properties of bioethanol as well as production costs. Data were collected using experimental methods. The raw material, musa paradisiaca artocarpus Peel, was processed through saccharification, fermentation, and distillation. The experiment used 500 grams of peel, 25 grams of yeast, and 20 grams of urea, with fermentation lasting four days and five-stage distillation conducted at 78°C, utilizing pumice stone adsorbent with a 70-mesh size. Chemical properties of the bioethanol were tested using ASTM standards: ethanol content (D5501), methanol content (D5501), water content (D1744), copper (D1688), acidity (D1613), chloride (D512), sulfur (D2622), and gum content (D381). Physical properties were tested using ASTM standards: density (D1298), kinematic viscosity (D445), flash point (D93), heating value (D240), boil point (D2892), pH (D6423), and octane number (D976). The results of the chemical property analysis showed that the bioethanol contained 99.65%-v ethanol, 0.02% methanol, 0.01% water, 0.02 mg/kg copper, 19 mg/l acidity, 16.75 mg/l chloride, 0.01 mg/l sulfur, and 1.02 mg/100 ml gum. The physical property analysis results revealed a density of 0.787 g/cm³, kinematic viscosity of 1.28 cSt, flash point of 18°C, boiling point of 78°C, heating value of 6985 kcal/kg, pH of 6.9, and an octane number of 107. Production costs for producing 1 litre bioethanol from musa paradisiaca artocarpus Peel with 99.65%-v ethanol content costs Rp.47,782,. Overall, this bioethanol offers excellent performance and environmental benefits, making it a viable alternative to as a substitute or a mixture of gasoline fuels.
Pengembangan Quality Function Deployment dengan Model Optimasi Multi-Kriteria I Nyoman Sutapa; Magdalena Wullur; Mohammad Sukri Bin Mustapa
Jurnal Teknik Mesin (Sinta 3) Vol. 22 No. 1 (2025): APRIL 2025 (SINTA 3)
Publisher : Institute of Research and Community Outreach, Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jtm.22.1.19-29

Abstract

Dalam upaya meningkatkan kepuasan pelanggan, proses desain produk harus secara efektif mampu menangkap dan menerjemahkan harapan dan kebutuhan pelanggan. Quality Function Deployment (QFD) adalah metode yang sering digunakan untuk membantu proses ini, tetapi implementasi QFD konvensional terkadang tidak optimal dalam mengakomodasi berbagai kriteria keputusan yang kompleks. Oleh karena itu, penggunaan metode Multi Criteria Decision Making (MCDM) seperti Analytic Hierarchy Process (AHP), VlseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR), dan Decision Making Trial and Evaluation Laboratory (DEMATEL) penting untuk meningkatkan efektivitas analisis QFD. AHP digunakan untuk memprioritaskan kebutuhan pelanggan berdasarkan minat relatif, sedangkan VIKOR membantu dalam menentukan solusi kompromi terbaik antara beberapa alternatif desain. DEMATEL, di sisi lain, memetakan hubungan sebab-akibat antara berbagai kriteria desain atau persyaratan teknis, sehingga membantu memahami interaksi yang lebih dalam dalam elemen desain. Kombinasi ketiga metode ini memungkinkan desainer produk untuk lebih tepat dalam menangkap ekspektasi pelanggan, sekaligus memberikan solusi desain yang optimal bagi produsen, baik dari segi kualitas, biaya, maupun efisiensi.
Review of Carbon Fiber Based on Physical and Mechanical Properties in Vehicle Frame Hafidz Salafuddin; Muhamad Fitri
Jurnal Teknik Mesin (Sinta 3) Vol. 22 No. 1 (2025): APRIL 2025 (SINTA 3)
Publisher : Institute of Research and Community Outreach, Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jtm.22.1.10-18

Abstract

This research aims to assess carbon fibre's physical and mechanical properties and potential use to improve vehicle efficiency. The main focus is to reduce vehicle weight, improve fuel efficiency, and lower carbon emissions. Carbon fibre has a tensile strength of more than 6 GPa, a modulus of elasticity of more than 600 GPa, and a density of 1.8-2.0 g/cm³. Its use in vehicles can reduce weight by 86%, improve fuel efficiency by 20%, and significantly reduce carbon emissions. The carbon fibre sandwich composite structure with an aluminium honeycomb core increases strength and reduces weight by 36%. Carbon fibre also improves the vehicle's rollover resistance by 64% and energy absorption by 60%. However, high manufacturing costs are a major challenge, with precursor materials such as polyacrylonitrile (PAN) accounting for about 50% of the cost. Biomass-based alternatives, such as lignin and agricultural waste, can reduce costs, although they require further development. Research shows that integrating recycled carbon fibre in metal-polymer hybrid structures can reduce vehicle weight by 48% and improve structural performance. This research emphasizes the importance of manufacturing innovation and the exploration of alternative materials to maximize the utilization of carbon fibre.
Perancangan Robot Serial Manipulator 6DoF dengan Sistem Transmisi Kabel pada 3 Joint Terakhir Ivan Christian Hernando; Roche Alimin; Edwin Manat; Melvin Emil Simanjuntak; Joseph Wicaksono Tandio
Jurnal Teknik Mesin (Sinta 3) Vol. 22 No. 1 (2025): APRIL 2025 (SINTA 3)
Publisher : Institute of Research and Community Outreach, Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jtm.22.1.30-38

Abstract

Perkembangan teknologi robotika, khususnya robot serial manipulator 6-axis, telah memberikan dampak signifikan dalam industri manufaktur dan otomasi. Penelitian ini mengusulkan penggunaan sistem transmisi kabel pada tiga sumbu terakhir robot serial manipulator 6-axis untuk mengurangi berat dan meningkatkan efisiensi pergerakan. Sistem transmisi kabel memiliki keunggulan dibandingkan dengan sistem rigid-link konvensional, termasuk bobot yang lebih ringan, konsumsi daya yang lebih rendah, dan fleksibilitas yang lebih tinggi. Namun, tantangan utama terletak pada kontrol ketegangan kabel dan presisi pergerakan. Penelitian ini melibatkan perancangan dan pembuatan prototipe robot menggunakan perangkat lunak 3D desain dan 3D printing, diikuti dengan pemrograman dan kalibrasi robot menggunakan perangkat lunak ACRS. Hasil penelitian menunjukkan bahwa penggunaan transmisi kabel pada robot 6-axis dapat meningkatkan fleksibilitas desain dan mengurangi beban pada joint robot. Meskipun demikian, penggunaan kabel juga menimbulkan tantangan dalam hal kontrol presisi, serta keterbatasan material filamen PLA+ yang digunakan dalam pembuatan komponen robot. Penelitian ini diharapkan dapat memberikan kontribusi dalam pengembangan robot manipulator yang lebih efisien dan fleksibel untuk aplikasi industri.
Cover, Hal Redaksi, Daftar Isi Jurnal Teknik Mesin
Jurnal Teknik Mesin (Sinta 3) Vol. 22 No. 1 (2025): APRIL 2025 (SINTA 3)
Publisher : Institute of Research and Community Outreach, Petra Christian University

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

Abstract

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Pemodelan dan Simulasi Kendaraan Listrik Full-Model untuk Analisis Interaksi Suspensi dan Regenerative Braking Reinaldi Teguh Setyawan; Sunarto Sunarto; Gunawan Gunawan
Jurnal Teknik Mesin (Sinta 3) Vol. 22 No. 2 (2025): OCTOBER 2025 (SINTA 3)
Publisher : Institute of Research and Community Outreach, Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jtm.22.2.108-116

Abstract

Penerapan sistem pengereman regeneratif pada kendaraan listrik memerlukan kondisi traksi yang stabil, terutama pada roda belakang yang sering mengalami penurunan gaya normal selama perlambatan. Penelitian ini bertujuan untuk mengevaluasi pengaruh karakteristik suspensi terhadap performa pengereman regeneratif, dengan memfokuskan pada interaksi dinamis antara sistem suspensi belakang dan distribusi beban vertikal. Metode yang digunakan berupa pemodelan matematis kendaraan dengan tujuh derajat kebebasan (7 - degree of freedom), mencakup translasi vertikal, rotasi pitch dan roll, serta respons masing-masing roda melalui sistem pegas dan redaman. Simulasi dilakukan dengan variasi kekakuan pegas antara 20 hingga 60 kN/m dan perlambatan 1,5–3 m/s². Hasil menunjukkan bahwa penurunan gaya normal roda belakang berbanding lurus dengan meningkatnya perlambatan, sehingga menurunkan torsi regeneratif maksimum hingga lebih dari 40 % pada konfigurasi suspensi lunak. Nilai kekakuan optimal ditemukan pada kisaran 40 – 50 kN/m, yang mampu menjaga traksi roda belakang tanpa mengorbankan kenyamanan vertikal kendaraan. Model 7 derajat kebebasan yang dikembangkan terbukti mampu merepresentasikan interaksi antara karakteristik suspensi dan efisiensi pengereman regeneratif secara akurat. Kesimpulan utama dari studi ini adalah bahwa desain suspensi harus menjadi bagian integral dari sistem pengereman regeneratif agar efisiensi energi kendaraan listrik dapat ditingkatkan tanpa mengorbankan stabilitas maupun kenyamanan. Temuan ini dapat menjadi dasar pengembangan lebih lanjut menuju sistem suspensi semi-aktif berbasis kontrol adaptif.
Influence of Spindle Speed and Ratio of Variation Amplitude of Milling Process on Vibration and Surface Roughness Tjuk Oerbandono; Mochammad Syamsul Maarif; Maverick Fadhlun Adrian Putra; Surangga Gautama; Denny Widhiyanuriyawan; Victor Yuardi Risonarta
Jurnal Teknik Mesin (Sinta 3) Vol. 22 No. 2 (2025): OCTOBER 2025 (SINTA 3)
Publisher : Institute of Research and Community Outreach, Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jtm.22.2.67-76

Abstract

Manufacture technology by using a computer numerical control (CNC) based machine has developed rapidly, particularly in the milling process. This technology, however, still experiences challenges, one of which is chatter. To prevent chatter, several methods are used, i.e. passive, active and spindle speed variation (SSV) methods. The SSV method is easy to apply since it does not require additional tools and only uses a certain algorithm to control the spindle speed. Aluminum alloys are selected as materials for various components since it is easy to machine, corrosion resistant, lightweight, and has a high strength to weight ratio. However, series 5xxx aluminum alloys have relatively low machinability. This experimental method research using a slot milling machine aims to validate the SSV system applied to the Router 2600 Pro to Aluminum 5052 and to determine the effect of SSV modulation amplitude on the surface roughness of 5052 aluminum with RVA variations of 0 (or without SSV) to 30%. In addition, the spindle speed was also varied at 3,000; 5,000 and 9,000 rotations per minute. During the machining process, an accelerometer sensor was installed to record vibration data. The results of surface roughness measurement and vibration analysis show that the best RVA was at 20%. If the RVA increased to 30%, the vibration increased and the surface roughness worsened. Meanwhile, the best nominal spindle speeds that produce low surface roughness are 5,000 and 9,000 RPM.
Lead Time and Cost Reduction in Reach Stacker Repair: A Lean Six Sigma Case Study Rio Wahyu Prasojo; Abduh Ghani Amrullah; Didik Wahjudi; Samuel Trinata Winnyarto; Muhammad Razzaq Multazam; Leon Jonathan
Jurnal Teknik Mesin (Sinta 3) Vol. 22 No. 2 (2025): OCTOBER 2025 (SINTA 3)
Publisher : Institute of Research and Community Outreach, Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jtm.22.2.77-84

Abstract

This study examines the application of the Lean Six Sigma DMAIC methodology to reduce repair times and operational costs in the maintenance of reach stackers at P. T. X, a container shipping company in Indonesia. It identifies the prolonged repair process, often extending to 14 days, primarily due to dependency on original equipment manufacturer suppliers and aging systems, as significant obstacles. The research emphasizes the development of an internally fabricated control system to mitigate these challenges, leading to enhanced operational independence and efficiency. The implementation of DMAIC methodology reduced repair lead time from 14 days to 3 days, achieving a cost reduction of over 90% related to previous downtime expenses caused by Kalmar control system failures. Through detailed analysis, the study highlighted factors contributing to inefficiencies, such as non-interchangeable components linked to identical stock keeping unit numbers, which exacerbated delays. The improved process involved creating tailored control systems, stockpiling essential components, and establishing standard operating procedure for maintenance. Furthermore, training programs for the maintenance team ensured competency in managing the new systems. The results indicate that integrating Lean Six Sigma methodologies with innovation in system development can greatly enhance reliability and efficiency in logistics operations. While this research primarily focused on Kalmar DRD and DRF types, it suggests potential for extending the approach to other reach stacker types. Future studies could investigate the integration of predictive maintenance technologies to improve reliability and reduce downtime in varied operational settings.
Analisis Multiple Repair pada Pengelasan Material HARDOX 400 Menggunakan Proses FCAW terhadap Sifat Mekanik dan Struktur Mikro Kukilo Edy Sasongko; Hendri Budi Kurniyanto; Alvalo Toto Wibowo
Jurnal Teknik Mesin (Sinta 3) Vol. 22 No. 2 (2025): OCTOBER 2025 (SINTA 3)
Publisher : Institute of Research and Community Outreach, Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jtm.22.2.51-66

Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh multiple repairs terhadap sifat mekanik dan struktur mikro material HARDOX 400 yang digunakan sebagai liner pada hopper di industri pertambangan. HARDOX 400 dipilih karena ketahanan ausnya yang tinggi, namun material ini memiliki weldability rendah sehingga rawan mengalami cacat saat pengelasan. Studi dilakukan menggunakan proses pengelasan FCAW dengan variasi jumlah repair yang dilakukan meliputi kondisi tanpa repair, serta repair yang dilakukan sebanyak satu, dua, dan tiga kali. Pengujian mencakup kekerasan, ketangguhan (impact), struktur mikro, dan ketahanan aus. Hasil menunjukkan kekerasan tertinggi terdapat pada HAZ repair tiga kali (249,76 Kgf/mm²), sementara kekerasan terendah ada pada weld metal repair dua kali (182,70 Kgf/mm²). Ketangguhan tertinggi ditemukan di HAZ tanpa repair (1,84 J/mm²), dan yang terendah di weld metal repair tiga kali (1,12 J/mm²). Struktur mikro didominasi ferrite dan pearlite, dengan peningkatan dominasi pearlite seiring bertambahnya repair. Ketahanan aus terbaik dimiliki tiga kali repair (0,004004770 mm³/N.m), sedangkan terburuk pada dua kali repair (0,006970926 mm³/N.m). Kesimpulan dari penelitian ini menyatakan bahwa multiple repairs cenderung meningkatkan kekerasan namun menurunkan ketangguhan material.
Adaptive Maintenance Strategy in Natural Stone Processing Industry: Integrating OEE-FMEA-Based Priority Matrix in the i-TPM-Lean+ Ahmed Jabari; Ahmad Atif Fikri; Muhammad Alfian Mizar
Jurnal Teknik Mesin (Sinta 3) Vol. 22 No. 2 (2025): OCTOBER 2025 (SINTA 3)
Publisher : Institute of Research and Community Outreach, Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jtm.22.2.94-107

Abstract

This study proposes a hybrid model integrating total productive maintenance (TPM) and Lean Manufacturing tools to improve machine effectiveness in a marble processing company in Indonesia. High downtime, performance inefficiencies, and quality losses were identified as key contributors to low overall equipment effectiveness (OEE). A structured framework, called i-TPM-Lean+, was implemented by combining OEE measurement with failure mode and effect analysis (FMEA) to prioritize improvement strategies. TPM pillars such as Autonomous Maintenance, Planned Maintenance, and Focused Improvement were applied alongside Lean tools including 5S and single minute exchange of dies (SMED). Real operational data was collected for 30 days before and after implementation to evaluate changes in machine performance. The results revealed a substantial improvement in OEE from 59% to 70%, with notable reductions in downtime (–67%) and increases in availability (from 79% to 88%), performance (from 81% to 84%), and quality rate (from 92% to 94%). Benchmarking with other relevant studies confirmed that this integrated approach leads to enhanced machine reliability and production efficiency. The proposed model offers a practical reference for manufacturing companies seeking to improve operational performance through a combined TPM-Lean approach, supported by data-driven prioritization and systematic evaluation.

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