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All Journal Media Mesin: Majalah Teknik Mesin Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) R.E.M (Rekyasa Energi Manufaktur) Jurnal Turbo : Jurnal Program Studi Teknik Mesin Journal of Energy, Mechanical, Material and Manufacturing Engineering Otopro Jurnal Konversi Energi dan Manufaktur Indonesian Journal of Innovation Studies PELS (Procedia of Engineering and Life Science) Jurnal Alat Berat
Edi Widodo
Universitas Muhammadiyah Sidoarjo
Aerospace Engineering Automotive Engineering Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering

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Rancang Bangun Bracket Stand Puller Untuk Melepas Rear Torque Rod Pin Unit HD 785-7 Syahruddin Syahruddin; Denny Kristianto; Basri Basri; Syaeful Akbar; Edi Widodo
JURNAL ALAT BERAT Vol 1 No 2 (2024): Juli 2024
Publisher : Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jab.v1i2.25

Abstract

Tujuan penelitian ini adalah membuat alat bantu untuk melepas rear torque rod pin. Permasalahan yang terjadi pada saat proses pelepasan rear torque rod pin adalah dengan memukul pin menggunakan hammer dan wire rope punch (chicken bar). Pada saat proses pelepasan pin dengan cara ini dapat menimbulkan resiko kecelakaan kerja. Berdasarkan permasalahan tersebut maka diperlukan untuk membuat bracket stand puller yang dapat membantu dalam proses pelepasan pin menggunakan puller dan hydraulic hand pump. Penelitian ini adalah penelitian lapangan (field research) dengan sumber data observasi, dokumentasi dan wawancara. Dari hasil percobaan dan analisis perbandingan sebelum dan sesudah adanya bracket stand puller menunjukkan waktu pelepasan rear torque rod pin 50% lebih efisien dan 45,45% lebih aman. Hal ini menunjukan bahwa special tool yang dibuat dapat memudahkan pengerjaan pelepasan rear torque rod pin, mengurangi waktu pekerjaan serta lebih aman ketika digunakan.
Effects of Lumajang sand-bentonite mix on Al-Si casting mechanical properties Edi Widodo; Rendra Dani Firmansyah; Subroto; Iis Siti Aisyah
Journal of Energy, Mechanical, Material, and Manufacturing Engineering Vol. 8 No. 2 (2023)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v8i2.29093

Abstract

The use of sand for metal molds is often found in various places; this research will focus on the type of sand used, namely sand from Lumajang Regency, which is known to be strong for concrete mixes or the like. So the purpose of this research is to find out how Lumajang sand molds will be used as metal casting molds. Testing will be carried out by making three variations of bentonite mixtures: 10%, 15%, and 20%. Later, after knowing the tensile and compressive strengths of each sand mold, casting will be carried out with three variations. For testing, casting objects will use the dye penetration test method. So that a description of the surface smoothness of the casting objects made from the three molds will be obtained and it will be known which variation is good to know about the sand mold and the appropriate metal casting results. From the results of the research conducted, it shows that the bentonite mixture with a percentage of 20% gets the highest compressive value with a value of 26.3 N/cm2 when compared to other bentonite mixture variations. From the tensile testing results, a high tensile strength value was obtained in the 15% bentonite mixture variation with a value of 0.7 N/cm2. While the results of the dye penetrant test were obtained, the results of the variation of the sand mold mixture with 20% bentonite into a mold produced the smoothest workpiece results with a few red spots caused during testing.
The effect of tapioca starch concentration on mechanical properties of Sansevieria Trifasciata fiber-reinforced composites Misbakh; Edi Widodo; Iis Siti Aisyah; Syahruddin; Nur Haizal Ariffin
Journal of Energy, Mechanical, Material, and Manufacturing Engineering Vol. 9 No. 1 (2024)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v9i1.32657

Abstract

This research investigates the impact of varying concentrations of tapioca starch (Manihot esculenta) on the mechanical properties of composites reinforced with Sansevieria trifasciata (Lidah mertua) fibers. The composites were fabricated using the hand lay-up method with SHCP 2668 polyester resin, mekpo catalyst, and alkali-treated fibers (5% NaOH). The fiber weight fraction was 30%, and the catalyst weight was 10% of the total specimen mass. The tapioca starch concentrations were 0%, 10%, 20%, 30%, 40%, and 50%, with a total matrix mass of 50 grams. Mechanical properties were evaluated through tensile tests (ASTM-D3039) and bending tests (ASTM-D790). The results indicated that composites with added tapioca starch exhibited improved tensile strength and a higher modulus of elasticity. However, for bending tests, the composites without added tapioca starch demonstrated better performance, showing a higher elastic modulus and better flexibility. In conclusion, adding tapioca starch enhances the tensile strength of the composites, making them stronger. Conversely, for bending applications, composites without tapioca starch are preferable due to their superior elasticity and bending strength.
NaOH Treatment Revolutionizes Strength of Fiber Composites Globally: Perlakuan NaOH Merevolusi Kekuatan Komposit Serat Secara Global Wahyu Aji Pamungkas; Edi Widodo
Indonesian Journal of Innovation Studies Vol. 25 No. 4 (2024): October
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/ijins.v25i4.1183

Abstract

This study investigates Sansivera fiber-reinforced composite materials treated with 15% NaOH alkaline liquid for different durations using the hand lay-up method. The aim is to determine the optimal treatment duration that enhances the tensile properties of these composites. Results indicate that longer NaOH treatment periods positively impact tensile strength, with the best outcomes observed at 15% treatment for 8 hours. These findings contribute to improving the mechanical performance of Sansivera fiber composites for various industrial applications. Highlight: Sansivera composites strengthen with 15% NaOH for 8 hours. Hand lay-up method enhances industrial applicability. Optimal treatment duration for Sansivera fibers is highlighted. Keyword: Sansivera fiber composites, NaOH alkaline treatment, Tensile strength enhancement, Hand lay-up method, Industrial applications
Co-Authors A'rasy Fahruddin Aditya Ramadhani Ahmad Faishol Andre Ryan Prasetyo Arya Rudi Nasution A’rasy Fahruddin Basri Basri Denny Kristianto Dwi Yuliyanto Eko Prasetio Putro Faisal Ansori Fajar Syahril Kirom Herman Herman Iis Siti Aisyah Ilham Dwiyoga Iswanto Iswanto Miftahul Huda Misbakh Mohammad Dani Iswanto Muhammad Jamaluddin Anwar Muhammad Marzuky Saleh Mulyadi Mulyadi Nur Haizal Ariffin Prantasi Harmi Tjahjanti Rachmat Firdaus Rega Yuan Pradhana Rendra Dani Firmansyah Ridho Choirul Anam Rio Putra Permadi Rizky Dwi Jayanto Subroto Sulis Yulianto Syaeful Akbar Syahruddin Syahruddin, Syahruddin Taufik Afandi Wahyu Aji Pamungkas