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Sukarno
Departement of Manufacturing Engineering, Politeknik Batulicin, South Kalimantan, 72273, Indonesia.
Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Analisis Kekuatan Lengkungan Material Baja Karbon Rendah Pada Lambung Kapal Sukarno, Sukarno; Bastomi, Mochamad; Asrul, Asrul; Tahir, M Ashar
Jurnal Ilmiah Teknik Mesin Vol 12 No 1 (2024): JURNAL ILMIAH TEKNIK MESIN
Publisher : Universitas Islam 45 Bekasi, Fakultas Teknik, Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/jitm.v12i1.8099

Abstract

Kekuatan lengkung material merupakan kemampuan suatu material untuk menerimah tegangan tanpa menyebabkan material menjadi patah.. Untuk mengetahui lengkungan material lambung kapal melalui proses penekukan dan untuk mengetahui kekuatan lengkung maksimum material pada lambung kapal yang sesuai dengan standar. Bahan material pada pengujian ini menggunakan plat baja ST.40 karbon rendah dengan ketebalan 8 mm. Spesimen menggunakan tandar ASTM baja ST 40 disebut dengan istilah AISI 420, Jenis pengujian ini menggunakan pengujian lengkung untuk mengetahui kekuatan baja. Hasil pengujian kekuatan lengkung ST.40 specimen A didapatkan rata-rata kekuatan lengkung maksimum sebesar 606 N/mm2, sedangkan spesimen B didapatkan rata-rata kekuatan lengkung maksimum sebesar 785 N/mm2. Kesimpulan Dari 2 (dua) pengujian spesimen nilai rata-rata kekuatan lengkung maksimum yang mendekati standar BKK yaitu specimen A.
Pengaruh Variasi Kampuh Pengelasan SMAW Terhadap Kekuatan Tarik Pada Baja Karbon S50C sukarno, sukarno
Jurnal Ilmiah Teknik Mesin Vol 12 No 2 (2024): JURNAL ILMIAH TEKNIK MESIN
Publisher : Universitas Islam 45 Bekasi, Fakultas Teknik, Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/jitm.v12i2.9901

Abstract

Pengelasan SMAW merupakan salah satu tenik penyambungan logam yang sederhana. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh kampuh V dan I terhadap kekuatan Tarik pada area sambungan baja karbon S50C sebagai bahan material uji. Dalam pembentukan specimen, setiap kampuh V dan I memiliki volume logam pengisi yang sama. Selanjutnya, specimen uji Tarik dibentuk dengan standar ASTM E8. Hasil dari penelitian ini menunjukkan bahwa jenis kampuh V dan I menghasilkan sifat mekanis yang berbeda. Tegangan Tarik tertingi terdapat pada jenis kampuh I dengan nilai sebesar 62,10 kg/mm2, untuk nilai regangan tertinggi terdapat padah kampuh V dengan nilai sebesar 14,2 %.
Prototype Sistem Anti Kriminal Menggunakan Open CV Pada Python Berbasis Mikrokontroller -, sukarno; amar, Ishak; Mariki, I Wayan Wawan
Jurnal Ilmiah Teknik Mesin Vol 13 No 1 (2025): JURNAL ILMIAH TEKNIK MESIN
Publisher : Universitas Islam 45 Bekasi, Fakultas Teknik, Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/jitm.v13i1.10670

Abstract

Security is the most important and primary thing in human life. It is generally known that security systems in the form of CCTV cameras and security guards have not been effective in providing a deterrent effect to criminals in carrying out their actions. So it takes a way to deal with this, the author created a prototype of an anti-crime security system using open CV on python based on a microcontroller. From the test results after conducting several experimental scenarios on the prototype that was created, it can function normally. The system created is able to identify or recognize facial samples at a distance of about 1.5 meters, with a minimum light intensity of 407 lux. The prototype is able to track the presence of target movements and can follow target movements from an angle of 0o-180o vertically and from an angle of 00-60o vertically, and can shoot targets in a stationary position within 5 seconds.
Mechanical and impact performance of oil palm trunk fiber composites for crash box applications Sukarno, Sukarno; Suci, Indah Melati
Jurnal Polimesin Vol 23, No 5 (2025): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i5.7818

Abstract

The increasing demand for lightweight and sustainable materials in automotive safety components has driven interest in natural fiber composites. Abundant oil palm trunk waste in South Kalimantan presents a promising, low-cost source for composite reinforcement. This study aims to analyze the crashworthiness performance of crash box structures using oil palm trunk fiber composites as an environmentally friendly alternative material. The research method involved the fabrication of composite specimens with fiber orientations of 30°, 60°, and 90°, using epoxy resin as the matrix. Mechanical testing included tensile tests based on ASTM D638-02 and Charpy impact tests based on ASTM D6110. The tensile test results showed that fiber orientation significantly affects the mechanical properties of the composites. The 60° orientation exhibited the highest tensile strength and elastic modulus, while the 30° orientation demonstrated the highest elongation, indicating better ductility. The 90° orientation showed intermediate performance but tended to be brittle. The impact test results revealed that the 60° fiber orientation had the highest toughness in absorbing impact energy, whereas the 30° and 90° orientations displayed lower toughness. Overall, the 60° fiber orientation of oil palm trunk composites shows potential for crash box applications, as it provides a balance between strength and toughness, although its brittleness still requires further consideration.
Longitudinal Strength Analysis of a Container Ship under Sagging and Hogging Conditions Using the Finite Element Method Indah Melati Suci; Sukarno; Muhammad Zubair Muis Alie
International Journal of Marine Engineering Innovation and Research Vol. 10 No. 4 (2025)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i4

Abstract

This study analyzes the longitudinal strength of a container ship under hogging and sagging conditions using the Nonlinear Finite Element Analysis (NLFEA) method. Numerical modeling was performed on a single frame spacing of the container ship to evaluate the stress and deformation distribution due to longitudinal bending loads. A three dimensional finite element model was developed using SHELL181 elements in ANSYS software, employing large displacement static analysis. The results show that under hogging conditions, the deck experiences a maximum tensile stress of 410.28 N/mm², while the bottom structure undergoes a compressive stress of -405.93 N/mm². Under sagging conditions, the deck experiences a compressive stress of 279.91 N/mm², and the bottom experiences a tensile stress of -387.80 N/mm². The ultimate bending moments were 1.42 × 10¹³ Nmm for hogging and -1.21 × 10¹³ Nmm for sagging, indicating that the ship is more susceptible to structural failure under sagging conditions. These findings highlight the importance of considering both loading conditions in the structural design of container ships to ensure safety and operational efficiency.
Co-Authors Amar, Ishak Asrul Asrul Indah Melati Suci M. Ashar Tahir Mariki, I Wayan Wawan Mochamad Bastomi Muhammad Zubair Muis Alie Suci, Indah Melati