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All Journal JOURNAL OF ELECTRICAL AND SYSTEM CONTROL ENGINEERING JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Jurnal Teknovasi : Jurnal Teknik dan Inovasi Mesin Otomotif, Komputer, Industri dan Elektronika Martabe : Jurnal Pengabdian Kepada Masyarakat Infotekmesin Journal of Applied Engineering and Technological Science (JAETS) Community Development Journal: Jurnal Pengabdian Masyarakat Teknomekanik Jurnal Anugerah: Jurnal Pengabdian Kepada Masyarakat Bidang Keguruan dan Ilmu Pendidikan Mejuajua IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) IRA Jurnal Pengabdian Kepada Masyarakat
Yopan Rahmad Aldori
Universitas Medan Area
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences Other

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PENERAPAN TEKNOLOGI TEPAT GUNA CHOPPER BLENDER PENGOLAHAN PAKAN TERNAK DI DESA KLAMBIR LIMA, KECAMATAN HAMPARAN PERAK Suprapto, Suprapto; Jubaidah, Jubaidah; Lisyanto, Lisyanto; Iskandar, Henry; Panjaitan, Binsar; Riadi, Selamat; Aldori, Yopan
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 8, No 8 (2025): MARTABE : JURNAL PENGABDIAN KEPADA MASYARAKAT
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v8i8.%p

Abstract

Pemanfaatan limbah pertanian dan perkebunan di pedesaan seringkali masih belum optimal, padahal memiliki potensi signifikan sebagai sumber pakan ternak alternatif. Permasalahan yang dihadapi mitra yaitu pakan hijau yang tidak tercacah sempurna  sering terbuang percuma, biaya pakan konsentrat tinggi, serta ketiadaan mesin pencacah. Pengabdian kepada masyarakat (PKM) ini bertujuan untuk meningkatkan efisiensi pengolahan pakan ternak melalui penerapan mesin Chopper Blender Teknologi Tepat Guna (MTTG-CB). Metode pelaksanaan kegiatan meliputi observasi, desain dan fabrikasi mesin, pelatihan operasional dan perawatan, uji coba lapangan, dan pendampingan teknis. Hasil implementasi MTTG-CB mampu mencacah 100 kg pakan hijauan dalam ±30 menit dengan ukuran 2-5 cm. Pelatihan dan pendampingan berhasil meningkatkan keterampilan mitra dalam penggunaan dan perawatan mesin. Melalui pemanfaatan limbah lokal, mitra dapat menghemat waktu dan menekan biaya pakan hingga 40%. Kegiatan ini terbukti meningkatkan efisiensi dan produktivitas peternak, serta berpotensi besar untuk direplikasi oleh peternak lain dalam mendukung ketahanan pangan berbasis lokal.
Analisa Tegangan dan Deformasi Pada Desain Kursi Menggunakan Finite Element Method Dengan Variasi Pembebanan Sugiono, Didik; Suprapto, Suprapto; Rahmad Aldori, Yopan; Supardi, Supardi
Infotekmesin Vol 16 No 2 (2025): Infotekmesin: Juli 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i2.2807

Abstract

The manufacturing process is an activity of processing raw materials into products to increase added value. One of these products is chair furniture; to reduce errors and failures in its manufacture, it is necessary to do prototype model experiments first. This research conducts a simulation study and analysis of the chair design on stress, deformation and safety factor using the Finite Element Method approach with the help of ANSYS ADPL 18.0 static structural software where the chair design is made of 304 stainless steel, aluminum-T6, HCP 30 polymer foam in one chair structure by simulating several static load loading scenarios, boundary conditions, and even distribution on the surface of the chair. The simulation results show that the highest maximum stress distribution (von misses stress) is 3.5 Mpa at a pressure of 175 kg.f, for the lowest value of 1.5 Mpa at a pressure of 5 Kg.f and a deformation (displacement) of 0.145x10ˉ4 mm occurs at a pressure of 175 Kg.f, while the lowest deformation value of 0.621x10ˉ5 occurs at a pressure of 75 Kg.f, This is due to the loading increasing along with the applied pressure force, but still in the minimum safety factor standard position for static loads, so as not to damage the geometric structure.
OPTIMALISASI PENGOLAHAN LIMBAH PLASTIK PADA KELOMPOK TANI JATI REJO-1 DI DESA PARTIMBALAN, BANDAR MASILAM, KABUPATEN SIMALUNGUN Jubaidah, Jubaidah; Suprapto, Suprapto; Iskandar, Henry; Puspita, Riana; Aldori, Yopan R.; Syahra, Assyfa; Aryanta Sembiring, Robi; Diansyah, Diansyah; Meidiansyah, Fadli
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 7, No 9 (2024): MARTABE : JURNAL PENGABDIAN MASYARAKAT
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v7i9.3544-3551

Abstract

Kegiatan Pengabdian Masyarakat (PKM) ini bertujuan untuk mengoptimalkan pengolahan limbah plastik di Kelompok Tani Jati Rejo-1, Desa Partimbalan, Bandar Masilam, Kabupaten Simalungun. Metode yang digunakan meliputi sosialisasi, pelatihan, dan pendampingan teknis dalam pengolahan limbah plastik menjadi produk yang bernilai ekonomis. Hasil menunjukkan adanya peningkatan pengetahuan dan keterampilan anggota kelompok tani dalam mengolah limbah plastik. Hasil kegiatan ini berhasil meningkatkan kesadaran lingkungan dan perekonomian masyarakat setempat.
KAJIAN TEKNOLOGI PEMBUATAN GULA SEMUT AREN ORGANIK PADA KELOMPOK TANI JATI REJO 1 DESA PARTIMBALAN Suprapto, Suprapto; Iskandar, Henry; Daryanto, Eka; Listiyanto, Listiyanto; Riadi, Selamat; Jubaidah, Jubaidah; R. Nurfazriah, Latifah; R. Aldori, Yopan; Giovan Panjaitan, Asido; Firmansyah Nasution, Taufik
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 7, No 8 (2024): MARTABE : JURNAL PENGABDIAN MASYARAKAT
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v7i8.3004-3012

Abstract

Produk Gula semut aren organik (GSAO) merupakan komoditi yang sangat diminati dipasar nasional dan insternasional. Pengembangan teknologi pengering sangat diperlukan untuk mendapatkan kualitas GSAO yang dapat memenuhi standar pasar. Mesin pengering jenis rak yang dimiliki mitra kelompok tani jati rejo-1 (KTJR-1) belum memenuhi standar teknis pengering. Kegiatan Pengabdian kepada Masyarakat (PKM) bertujuan penerapan ilmu dan ahli teknologi dalam pengembangan teknologi pengeringan rotary drying machine (RDM) untuk meningkatkan kuantitas dan kualitas produk GSAO. Metode pelaksanaan PKM mencakup survei, observasi, pelatihan dan pendampingan, serta analisis mesin pengering jenis rak yang ada di mitra. Hasil rancangan mesin dan perpindahan panas dapat dijadikan dasar oleh mitra dalam fabrikasi sebuah mesin pengering dengan menerapkan prinsip perpindahan panas yang effisien untuk meningkatkan kualitas dan efisiensi produksi GSAO.
Pemanfaatan Tungku Berbahan Bakar Oli Bekas untuk Peleburan Aluminium Daur Ulang dan Kajian Mikrostruktur serta Kekerasan Pasca Quenching Aldori, Yopan Rahmad; Suprapto, Suprapto; Idris, Muhammad; Prayoga, Muhammad Angga; Girsang, Evan Roland
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.313

Abstract

This study investigates the use of a Waste-Oil-Fueled Furnace (WOFF) as an alternative heat source in the melting process of recycled Al-3004 aluminum. The melting was carried out using the sand casting method at a pouring temperature of approximately 730 °C, while measurements indicated the furnace could reach ±900 °C, exceeding the melting point of Al-3004 (±660 °C). The cast specimens were subsequently quenched in three media: water, oil, and air. Microstructural observations revealed that the cooling rate significantly affected crack formation: water quenching produced the largest cracks, oil quenching produced medium-sized cracks, and air cooling produced the finest cracks. Micro Vickers hardness testing supported these findings, showing significant differences in hardness values across the quenching media. Overall, the study confirms that the waste-oil-fueled furnace is an effective alternative energy-based metal-melting technology, while the choice of cooling medium plays a crucial role in controlling the material's microstructural features and mechanical properties.
Analisis Kinerja Struktur Crane Monorel 8 Ton Menggunakan Analisis Rangka dan Evaluasi Sambungan Baut Handoko, Ari; Aldori, Yopan Rahmad; Mislan, Mislan; Farsa, Fadhli; Setyanto, Nova Arief; Masrajuddin, Masrajuddin
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.359

Abstract

This study analyzes the structural performance of an 8-ton monorail crane using frame analysis simulation in Autodesk Inventor Professional 2012. The structure is made of ASTM A36 carbon steel, and the applied load is calculated with a safety factor of 1.67, yielding a load of 131,061.6 N. The evaluated parameters include bending moment, shear force, normal stress, and displacement. The results show a maximum bending moment of 1,538,000 N·mm, a maximum shear force of 97,063 N, and a maximum stress of 151.6 MPa, which is below the allowable stress of 250 MPa. The maximum displacement of 29.95 mm is also lower than the allowable limit of 30.5 mm according to SNI 03-1729-2002. In addition, bolt-connection evaluation confirms safe performance under loading. Therefore, the monorail crane structure is considered safe and suitable for lifting 8 tons.
Pemanfaatan Limbah Cangkang Telur Sebagai Katalis Biodiesel Dari Minyak Goreng Limbah Pada UMKM Roti Pakcik Tanjung Morawa Idris, Muhammad; Hermawan, Indra; Jufrizal, Jufrizal; Aldori, Yopan Rahmad; Supriatno, Supriatno; Harahap, Uun Novalia
IRA Jurnal Pengabdian Kepada Masyarakat (IRAJPKM) Vol 3 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajpkm.v3i3.258

Abstract

This Community Service Program focuses on managing micro-business-scale food production waste. The activity was carried out at Pakcik Tanjung Morawa Roti MSMEs in the Tanjung Morawa area. These MSMEs produce used eggshell waste and cooking oil every day. The waste has not been managed systematically and could pollute the surrounding environment. This program aims to increase partners' awareness of the value of organic waste. The program also introduces the concept of waste utilization as an alternative energy source.  The activity's approach is educational and informative through field visits. The methods used include observation, interviews, and two-way discussions. The team conveyed the potential of eggshells as a source of calcium oxide.  Calcium oxide serves as a biodiesel catalyst from waste cooking oil. Activities do not yet include technical training or process demonstrations. The activity results showed an increase in the partners' initial understanding. Partners show interest in sustainable waste management. This program results in a mapping of potential waste and partner needs. The output of the activity is documented in reports and follow-up plans. This program is the foundation for the next stage of technology assistance. A simple approach is assessed based on the partner's capacity. Activities support waste reduction and community-based environmental education. 
Uniaxial and biaxial hot pressing of PVDF films: A pathway toward high-performance piezoelectric sensors and energy harvesters Suprapto, Suprapto; jubaidah, Jubaidah; Triono, Selamat; Gunawan, Harianto; Lisyanto, Lisyanto; Nugraha, Aditya Sukma; Aldori, Yopan rahmad
Teknomekanik Vol. 9 No. 1 (2026): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v9i1.44972

Abstract

The piezoelectric efficiency of Poly (vinylidene fluoride) (PVDF) membranes becomes restricted by the challenge of generating and stabilizing electroactive β-phase during processing. Stretching requires control of deformation parameter, while solvent-based methods bring environmental and occupational health risks. This research suggests hot-pressing as an alternative method for enhancing β-phase fraction, utilizing multidirectional stress without solvent or chemical exposure. This study systematically compares uniaxial hot-pressing (Uniaxial HP) and biaxial hot-pressing (Biaxial HP) setups to determine which stress distribution is more effective at promoting changes and improving piezoelectric properties in PVDF membranes. The main objective of this research is to systematically evaluate and compare the impacts of uniaxial and biaxial hot-pressing on the crystalline phase transformation and electromechanical performance, including the piezoelectric coefficient (d33) and output voltage response of PVDF membranes. PVDF pellets were hot-pressed at 220o C under a pressure of 60 MPa for 15 minutes followed by rapid quenching in ice water. X-Ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) confirmed phase composition, correlated with performance via the piezoelectric coefficient (d33), and assessed piezoelectric activity. Experimental results show that biaxial loading provides a higher b-phase fraction (50.47%) compared to untreated membranes (47.80%) and UHP samples (49.30%). The crystallinity and the piezoelectric coefficient also increased to 49% and 18.8 pC/N, respectively. Biaxial stress pattern during hot-pressing induces favourable thermodynamic and kinetic conditions for b-phase expansion. Beyond phase-related results, the approach delivers competitive piezoelectric effectiveness while maintaining simplicity and reducing solvent-dependent processing steps.
Co-Authors Abd Rahman Bin Dullah Adly Zulqarnain bin Mohamad Andri Herlambang Ardaha, Mhd. Taufik Ariyudha, Andhika Arya Rudi Nasution Aryanta Sembiring, Robi Binsar Panjaitan, Binsar Bobby Umroh Darianto, Darianto Darwin, Felix Derlini Diansyah, Diansyah Din Aswan Amran Ritonga Eka Daryanto, Eka Erni Yusnita Etanto Heiliano Wijayanto Faddillah, Fahmi Farsa, Fadhli Faruqi, Muhammad Dava Fider Lumbanbatu Firmansyah Nasution, Taufik Giovan Panjaitan, Asido Girsang, Evan Roland Gunawan, Harianto Habib Satria Handoko, Ari Harahap, Uun Novalia Hasibuan, Samsul Abdul Rahman Sidik HENRY ISKANDAR Hermansyah Hermasnyah Ida Royani Indra Hermawan INDRA HERMAWAN Iqbal, Mhd. Iswandi Iswandi Iswandi Iswandi Jubaidah Jubaidah Jubaidah, Jubaidah Jufrizal Jufrizal Jufrizal Jufrizal JUNAIDI Listiyanto, Listiyanto Lisyanto . Maghfirah Maghfirah Marwan Marwan Masrajuddin, Masrajuddin Meidiansyah, Fadli Mislan Moerni, Saufa Yardha Muhammad Abdul Rasyid Muhammad Idris Muhammad Idris Muhammad Irwanto Muhammad Yusuf Rahmansyah Siahaan Muhathir, Muhathir Pangestu, Reno Prabowo, Yoga Pranata, Hadi Pratiwi Putri Lestari Prayoga, Muhammad Angga R. Nurfazriah, Latifah Rambe, Yunita Syafitri Recsi Febian Adiansyah Riana Puspita, Riana Rizki Muliono Ruztamreen Bin Jenal Sandi Saputra Selamat Riadi Selamat Triono, Selamat Sembiring, Bagus Suranta Setyanto, Nova Arief Sianturi, Danial Jack Marbis Sinaga, Willyam Warikson Siswo Pranoto Sugiono, Didik Sukma Aditya Sukmawati Supardi Supardi Suprapto Suprapto Suprapto Suprapto Supriatno, Supriatno Susilawati, Susilawati Syahra, Assyfa Syurkarni Ali Taufik Wal Hidayat, Taufik Wal Tika Ermita Wulandari Tino Hermanto Tumangger, Theo Fredrik Zarmawan, Husri