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All Journal Dinamika Hukum Sinergi ROTOR: JURNAL ILMIAH TEKNIK MESIN Indonesian Journal of Science and Technology R.E.M (Rekyasa Energi Manufaktur) Jurnal Jurnal Rekayasa Mesin Journal of Mechanical Engineering Science and Technology Jurnal Ilmiah Kebijakan Hukum Animal Production : Indonesian Journal of Animal Production JEPA (Jurnal Ekonomi Pertanian dan Agribisnis) SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Agrisocionomics: Jurnal Sosial Ekonomi Pertanian Ta`Limuna : Jurnal Pendidikan Islam ComTech: Computer, Mathematics and Engineering Applications Jurnal Ilmiah Fillia Cendekia Revitalisasi : Jurnal Ilmu Manajemen INTEGRITAS : Jurnal Pengabdian Manajemen Agribisnis: Jurnal Agribisnis Jurnal Abdi Insani Jurnal Dinamika Sosial Ekonomi Otonomi Jurnal Ilmiah Pendidikan Visioner (JIPV) ARMATUR : Artikel Teknik Mesin dan Manufaktur CITIZEN: Jurnal Ilmiah Mulitidisiplin Indonesia JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI Jurnal Manajemen Pesisir dan Laut Jurnal Polimesin Indonesian Journal of Maritime Technology or abbreviated (ISMATECH) INTERACTION: Jurnal Pendidikan Bahasa
Sumarji
Universitas Jember
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Veterinary Other

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Strength Analysis of Deck A KM. Dharma Kencana V Due to The Addition of Construction With The Finite Element Method Rizki, Muhammad Khoirur; Arianto, Pratama Yuli; Sumarji, Sumarji; Rudianto, Rudianto
Indonesian Journal of Maritime Technology Vol. 3 No. 2 (2025): Volume 3 Issue 2, December 2025
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v3i2.8481374

Abstract

The Dharma Kencana V passenger ship is a type of crossing ship owned by a Japanese shipping company which was later acquired by an Indonesia shipping company whose planned shipping route crosses from Surabaya to Makassar. With the transfer of the ship’s shipping route, repairs and the addition of new construction in the deck A area were carried out so that the addition of the new construction increased the load the ship received. This study aims to determine the allowable stress allowed by the Indonesian Classification Bureau (BKI) Rules for Hull 2022 [1] from the stress results due to new construction on the deck. The analysis was carried out using the finite element method with numerical modeling using Ansys Static Structure student version software with a division of elements (meshing) size 200 mm on deck A frame 13 to 85. Based on the results of the element division of deck KM. Dharma Kencana V into 44767 elements at nodes 45384 and the maximum stress at 77.41 MPa. The allowable stress limit based on the BKI standard does not exceed 230 MPa, [1] so a safety factor of 2.97 is obtained so it can be concluded that the strength of the construction of deck A KM. Dharma Kencana V is still a safe category.
Analisa Bauran Pemasaran Dalam Meningkatkan Volume Penjualan Dan Loyalitas Benih Cabai Rawit Ori 212 Pada CV. Aura Seed Indonesia Rochman, Abdul; Sumarji, Sumarji
Manajemen Agribisnis: Jurnal Agribisnis Vol 26 No 1 (2026): Manajemen Agribisnis: Jurnal Agribisnis
Publisher : Universitas Islam Kadiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32503/agribisnis.v26i1.8595

Abstract

Banyak faktor yang dapat mempengaruhi keputusan pembelian konsumen terhadap suatu produk. Bauran pemasaran merupakan salah satu aspek strategi dalam pemasaran produk benih cabai rawit ORI 212. Tujuan dari penelitian ini untuk menganalisa bauran pemasaran untuk meningkatkan volume penjualan dan loyalitas pengguna benih cabai rawit ORI 212 di CV. Aura Seed Indonesia. Penelitian ini menggunakan metode penelitian kualitatif yang menghasilkan data deskriptif tertulis atau lisan dan perilaku yang diamati. Hasilnya CV Aura Seed Indonesia melaksanakan bauran pemasaran 4P (produk, harga, tempat, promosi) dalam menjual produk benih cabai rawit ORI 212
Eksplorasi Komposit Sandwich Berbasis Polyurethane sebagai Alternatif Material Struktural dalam Industri Kelautan R. Puranggo Ganjar Widityo Widityo; Sumarji; Dani Hari Tunggal Prasetiyo; Subhannaan Alif Rezeki
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 1 (2026): Jurnal Armatur
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i1.9461

Abstract

The use of lightweight structural materials, high mechanical strength, and resistance to corrosive marine conditions is very important for the marine industry. The properties of lightweight, strong, and corrosion-resistant materials can be fulfilled by one of the materials, namely polyurethane sandwich composites. The purpose of this study is to study how sandwich composites function mechanically with various types of reinforcing layers (skins), including Chop Strand Mat (CSM), Woven Roving (WR), and a mixture (CSM + WR) and two types of cores, namely polyurethane sheet and polyurethane foam. This study uses a hand lay-up technique to make sandwich composite specimens. Then, the specimens were tested with flexural and impact tests to measure the mechanical properties of the material. The flexural test results showed that the specimen with WR skin and polyurethane sheet core had the highest flexural strength of 94.78 MPa. On the other hand, the impact test, the WR composition also showed the best value, with an impact value of up to 0.34 J/mm² in the polyurethane foam core configuration. The results showed that the sandwich composite consisting of a WR skin and a polyurethane foam core had the best mechanical performance in terms of flexural strength and impact toughness. Therefore, this composite can be used as an alternative structural material in marine industry applications.
Optimisation of Preheating Temperature for Mechanical Performance of SMAW Welded ASTM A36 Steel Sumarji, Sumarji; Hariyanto, Agus; Wahyudianto, FX. Arif; Suprihanto, Agus
Jurnal Rekayasa Mesin Vol. 21 No. 1 (2026): Volume 21, Nomor 1, April 2026
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v21i1.7356

Abstract

The Shielded Metal Arc Welding (SMAW) process applied to ASTM A36 structural steel generates thermal cycles that influence the mechanical behaviour of welded joints. This study investigates the effect of preheating temperature on tensile properties and hardness distribution of SMAW-welded ASTM A36 steel plates with a thickness of 10 mm. Preheating temperatures of none, 150 °C, 250 °C, and 350 °C were applied prior to welding in the 1G position using AWS A5.1 E7016 and E7018 electrodes. Tensile testing was conducted according to ASTM E8, while Vickers hardness measurements were performed across the base metal (BM), heat-affected zone (HAZ), and weld metal (WM). The results show a consistent hardness distribution of WM > HAZ > BM for all preheating conditions, with average hardness values ranging from 190–210 HV in the WM, 179–186 HV in the HAZ, and 164–173 HV in the BM. The yield strength increased from 301.69 MPa (without preheating) to 315.68 MPa at 250 °C, followed by a decrease to 298.70 MPa at 350 °C, which is associated with microstructural softening. In contrast, the ultimate tensile strength remained relatively stable within the range of 443–446 MPa. Based on these results, preheating at 250 °C tends to provide a more homogeneous hardness distribution and higher yield strength, suggesting a more favourable thermal condition for improving the mechanical performance of SMAW-welded ASTM A36 steel. .
Co-Authors Abdul Rochman Abu Talkah Adi Purnomo Adi Purnomo Agus Hariyanto Agus Suprihanto Ahmad Jukliv Pandu Yoedhawan Ahmad Jukliv Pandu Yoedhawan, Ahmad Jukliv Pandu Ahmad Syuhri Ales, Steve Korakan Aman Sentosa Aman Sentosa, Aman Amirur Ridho Muhammad Andi Sanata Angger Sudrajat Angger Sudrajat, Angger Ardiansah, Nugroho Jarot Dwi Aris Zainul Muttaqin Arisyahidin, Arisyahidin Aulia, Kunti Rachma Chamim Rosyidin Danang Yudistiro Dani Hari Tunggal Prasetiyo Danny Febriansyah Daroini, Ahsin Daroni, Ahsin Dedi Dwi Laksana Dedi Dwi Laksana Dedi Dwilaksana Digdo Listyadi, Digdo Dwi Djumhariyanto Dwi Suryanningdyah Heni Untari Esti Widasih Gaguk Jatisukamto Gumira, Seno Wibowo Haidzar Nurdiansyah Hari Arbiantara Hari Arbiantara Basuki Hary Sutjahjono Heni Untari, Dwi Suryanningdyah Imam Sholahuddin Intan Hardiatama Istiyowati, Nuning Iwan Faisal Hidayat Karina, Asa khoirul fahmi aziz Lutfi, Dwiki Alfikriyadi M Asrofi Mahros Darsin Masfeya Eka Hermiansyah Masruri Wardhana Mega Hastuti, Sri Wahyuni Melany Pilatusalim Mochamad Asrofi Mochamad Edoward Ramadhan Muhammad Abduh Muhammad Trifiananto Mulyani, Novilia Mulyaningtyas, Ratna Dewi Mustofa, M. Rowi Naafi' ul Amri Nasrul Ilminnafik Naufal Fardio Albajili Naufan Arviansyah Ningsih, Dwi Aminawati Nopitasari, Dewi Nova Monica Aulia Safitri Novel Bagas Satrio Wibowo Nurteteng, Nurteteng Nurul Huda Oktaviyanti, Milla Pratama Yuli Arianto Prayogo Alim Pangestu Puanggo Ganjar Widityo Puranggo Ganjar Widityo R. Puranggo Ganjar Widityo Widityo Rahma Rei Sakura Rahmatullah Rahmatullah Raihaan, Raihaan Rama Wira Drana Wasistha Ramadhan, Ivan Fadilla Ramli Firdaus Kusnadi Ratna Dewi Mulyaningtiyas Ratna Dewi Mulyaningtiyas Ratna Dewi Mulyaningtiyas Ridha, Fabrobi Rizka Febby Rofi'ah Rizki, Muhammad Khoirur Robertoes Koekoeh KW Robertus Sidartawan Rony Agista Apriansyah Rudianto Rudianto Rusandy, Deby Santyo Saefuddin, Yusuf Saifurridzal, Saifurridzal Salahuddin Junus Setyani, Adika Desi Silvia Andress Andress Subhannaan Alif Rezeki Suci, Ririn Kurnia Suparno Suparno Supriyono Supriyono Susanti, Rizqa Putri Suwasono, Edi Syahriza, Mochamad Rifki W.C.S, I Made Ivan Wahyudianto, FX. Arif Wazirotus Sakinah Wibowo, Robertoes Koekoeh Koentjoro Widityo, R. Puranggo Ganjar Widityo Yanuar Alditya Nugraha Yasim, Ahmad Yulio, Agit Yoga Yusuf Nur Afandi Yusuf Nur Afandi, Yusuf Zainul Arifin