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All Journal Jurnal Teknik Mesin Indonesia Journal of Mechanical Design and Testing (JMDT) Jurnal Teknologi dan Rekayasa Alat Berat (JTRAB)
Budi Basuki, Budi
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Aerospace Engineering Automotive Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis Kegagalan Material Patahnya Coil Spring pada Track Adjuster Excavator PC 78 Leo Adi Saputra; Santoso, Nugroho; Setyana, Lilik Dwi; Basuki, Budi
Jurnal Teknologi dan Rekayasa Alat Berat Vol 2 No 1 (2025): JTRAB Volume 2, No 1, 2025
Publisher : Department of Mechanical Engineering, Vocational College, Gadjah Mada University.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtrab.v2i1.15707

Abstract

One of the critical components of an excavator's undercarriage is the coil spring, which frequently breaks due to extreme working conditions, lack of routine maintenance, and material defects. This coil spring failure often occurs in the PC 78 excavator unit. The resolution of this issue requires an undetermined period of time. This problem can lead to decreased and suboptimal excavator productivity. The objective of this study is to identify the causes of coil spring fractures, evaluate its mechanical strength, and determine the type of material used. The methods applied include chemical composition analysis, microstructure examination, hardness testing, and impact testing. Visual observations indicate that the coil spring failure is caused by material fatigue, crack initiation, propagation, and final fracture characterized by beach marks and striations. Chemical composition analysis reveals the dominance of iron (Fe), carbon (C), chromium (Cr), and manganese (Mn), classifying the material as AISI 51xx steel. Microstructural examination shows a dominance of bainite, which contributes to the material's hardness. Vickers hardness testing indicates high hardness values consistent with the observed microstructure. Impact testing results suggest that the fractured specimen exhibits ductile behavior.
Studi Kasus Perancangan Rangka Motor Listrik Tipe Naked Bike Menggunakan ANSYS Putra, Arya Pratama; Basuki, Budi; Sugiyanto; Wibowo, Setyawan Bekti
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v20i1.482

Abstract

The function of the frame on the electric motorcycle is to support the rider's load and where several motor components are combined, and also acts as the basic form of the motorcycle itself. The design of the electric motorcycle frame design also needs a finite element analysis. The analysis computes and produces formulas to estimate the actions that can be performed on the object, where this method involves dividing the structure into smaller elements connected by nodes or in other words, the discretization of elements. The objective of this research is to analyze the yield strength level of the electric motorcycle frame design under static loading conditions in accordance with the load safety standards of two-wheeled vehicles in Indonesia. The subject of this research is an electric motorcycle frame design with a naked bike frame type. The material used in the frame is aluminum alloy 6061 T6. The total loading during simulation is 265 kg. The quality of element discretization obtained in the electric motorcycle frame design is 0,278 with the size of each element of 5,5 mm. The maximum von Misses stress obtained is 125,3 MPa with a maximum deformation of 0,08618 mm and the safety factor is 2,154. The results of this study provide a statement that the electric motor frame design is able to withstand the load during simulation.
Kekuatan pergelangan kaki prostetik pergelangan kaki dengan bahan baja dan aluminium Handoko, Handoko; Dwi Setyana, Lilik; Basuki, Budi; Hari Priambodo, Bambang; Isyroudin, M. Habib; Kurniawan, Yani
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v20i1.812

Abstract

Leg prosthetics as a device to increase the mobility of people with disabilities need to be supported in their development, especially in terms of comfort. Modifications to make prosthetics more comfortable to use are by utilizing the elastic properties of springs and base plate materials and dampers. This study analyzes the strength of steel and aluminium prosthetic base components in bearing the dynamic load of user's body. The analysis uses computational techniques with the finite element method. Computational results show that the most critical part of prosthetic, i.e. the base, is safe with maximum working stresses of 31,56 MPa for steel and 44,03 MPa for aluminium. Both materials are able to withstand the working stress.
Analisis Reverse Engineering L-Bracket dan Cross Member Pada Perisai Kolong Al Ihsan, Rozaan Faros; Pratama, Wisnu Bayu; Handoko, Handoko; Kurniawan, Wingky; Basuki, Budi; Wibowo, Setyawan Bekti
Journal of Mechanical Design and Testing Vol 7, No 1 (2025): Articles
Publisher : Department of Mechanical and Industrial Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jmdt.85959

Abstract

Komponen perisai kolong (side guard) pada truk komersial, merupakan komponen baru yang wajib harus dimiliki oleh truk yang beroperasi di Indonesia. Kewajiban ini harus dipenuhi oleh truk komersial, dan tercantum pada Peraturan Menteri Perhubungan Republik Indonesia nomor 74 Tahun 2021 tentang perlengkapan keselamatan kendaraan bermotor. Peraturan tersebut dilatarbelakangi oleh banyaknya kecelakaan tabrak kolong (Underride) yang terjadi. Side guard wajib dimiliki oleh seluruh kendaraan komersial dan terpasang dari perusahaan pembuat sampai dengan karoseri sebagai safety dan regulasi. Side guard dari perusahaan pembuat nantinya tidak digunakan kembali setelah kendaraan sampai karoseri. Perusahaan terkait mengeluarkan biaya yang tinggi untuk membuat side guard untuk komponen bracket dan crossmember. Maka dalam penelitian ini akan dilakukan optimalisasi desain bracket dan cross member sebagai komponen utama penyusun rangkaian komponen side guard untuk mengurangi biaya produksi. Optimasi desain akan dilakukan menggunakan metode analisis reverse engineering, metode analisis CAE (Computer Aided Engineering) dengan bantuan software CATIA, dan analisis cost reduction untuk melihat cost down yang terjadi. Pada penelitian ini akan menggunakan metode penelitian kualitatif dan kuantitatif pada pembahasan analisis CAE. Hasil penelitian dari aktual cases ini didapatkan desain baru hasil optimasi pada L-bracket, pengurangan thickness pada L-bracket dan cross member, hasil analisis CAE pada single part (L-bracket dan cross member) dan assembly part (ROH (Rear Overhang) dan Wheelbase Assy), dan cost down yang didapatkan dari hasil optimasi desain. Setelah dilakukan penelitian dan pembahasan maka disimpulkan bahwa optimasi desain yang dilakukan dapat memangkas biaya produksi perisai kolong sebesar 54,7% pada cross member. Pada L-bracket nomor 1 mengalami cost down sebesar 52,7%. Kemudian, pada L-bracket nomor 2 mengalami cost down sebesar 48,3%. Secara keseluruhan dari hasil penelitian ini dapat diimplementasikan atau referensi implementasi pada rangkaian side guard.
Co-Authors Al Ihsan, Rozaan Faros Dwi Setyana, Lilik Handoko Handoko Handoko, Handoko Hari Priambodo, Bambang Isyroudin, M. Habib Kurniawan, Wingky Leo Adi Saputra Lilik Dwi Setyana Nugroho Santoso Pratama, Wisnu Bayu Putra, Arya Pratama Setyawan Bekti Wibowo SUGIYANTO Yani Kurniawan, Yani