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All Journal Jurnal Energi Dan Manufaktur KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan AUSTENIT Jurnal Mechanical Turbo : Jurnal Program Studi Teknik Mesin Jurnal Teknik Mesin Jurnal Teknik Mesin Indonesia Sprocket : Journal of Mechanical Engineering Jurnal Pengabdian Kepada Masyarakat (JPKM) Tabikpun Journal of Integrated and Advanced Engineering (JIAE) Bhinneka Multidisiplin Journal Jurnal Polimesin Prosiding SNTTM Nemui Nyimah
Asnawi Lubis
Universitas Lampung
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Material selection for coal flow breaker plate based on fatigue life analysis using finite element method Lubis, Asnawi; Hadi, Kiagus Abdul; Akmal, Jamiatul; Badaruddin, Mohammad
Jurnal Polimesin Vol 23, No 2 (2025): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i2.5407

Abstract

Fatigue failure in the coal flow breaker plate of the CV507 screen at PT. Bukit Asam–Tarahan Port has led to production delays and increased maintenance requirements. This study investigates the optimal material selection for the coal flow breaker plate based on fatigue life under bulk impact loading. The structure, modelled as a fixed vertical plate, was analyzed using the Finite Element Method (FEM) with two material options: ST37 and ST52, each at thicknesses of 15 mm and 20 mm. Static structural and explicit dynamic simulations were performed in ANSYS, using an impact load of 15 kN measured from site conditions. The results indicate that ST52 with a 15 mm thickness experienced the highest von Mises stress (2,223.4 MPa) and deformation (14.41 mm). Increasing the thickness to 20 mm reduced stress to 1,465.4 MPa and deformation to 10.99 mm, extending fatigue life to 8.54 months, making it the most suitable option. These findings provide a basis for selecting materials that enhance durability and minimize downtime in coal processing operations.
Pentingnya Pemahaman tentang Suhu Ruangan dan Penggunaan Termostat Digital untuk Menghemat Energi Suudi, Ahmad; Lubis, Asnawi; Tantri, Novri; Hasymi, Zulhendri
Nemui Nyimah Vol. 3 No. 2 (2023): Nemui Nyimah Vol.3 No.2 2023
Publisher : FT Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/nm.v3i2.101

Abstract

Artikel pengabdian ini membahas pentingnya pemahaman tentang suhu ruangan dan penggunaan termostat digital untuk menghemat energi. Dalam kondisi di mana energi semakin terbatas dan mahal, meminimalkan penggunaan energi menjadi penting untuk mengurangi biaya dan menjaga lingkungan. Kegiatan pengabdian ini menyajikan metode praktis untuk menghemat energi dengan mengoptimalkan suhu ruangan melalui kombinasi penggunaan ventilasi tembus, exhaust fan dan termostat digital. Metode yang digunakan adalah ceramah kepada peserta kegiatan yaitu masyarakat dusun Penagan Jaya dilanjutkan dengan diskusi. Tim PKM juga melakukan demontrasi pemasangan ventilasi, exhaust fan dan termostat digital pada ruang kamar salah satu warga. Setelah dilakukan pengumpulan data hasil pre-test dan post-test dapat disimpulkan terjadi peningkatan pemahaman warga dusun Penagan Jaya peserta pengabdian sebesar 64% dari sebelumnya yang hanya 22% . Pemahaman warga peserta kegiatan berupa pentingnya pemasangan ventilasi udara yang benar dan tepat, serta penggunaan exhaust fan yang dikombinasikan dengan termostat digital sebagai upaya mendapatkan suhu ruangan yang nyaman dengan tetap menghemat energi
PERANCANGAN ALAT PENGUJIAN IMPAK METODE CHARPHY SKALA LAB MENGGUNAKAN ASTM E23 Dimas, Dimas Ega Setiawan; Lubis, Asnawi; Ansyori, Anang; Hartawan, Beny
Bhinneka Multidisiplin Journal Vol. 3 No. 1 (2026): Bhinneka Multidisiplin Journal
Publisher : Yayasan Education and Social Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53067/bmj.v3i1.95

Abstract

One of the basic construction requirements is material. The mechanical properties required by a material include ductility, hardness, strength, and toughness. To determine the mechanical properties of a metal, it must be tested, one of which is the impact test. Impact testing is a test that measures resistance to shock loads. This study aims to design and construct an impact testing machine using the Charpy method and conduct direct research to determine the strength and impact energy of a metal. The tools used include a measuring scale, bearings, a shaft, a frame, a pendulum, and brakes. The test specimens used the ASTM E23 standard, which has a square cross-sectional area (10 x 10 mm) and a V-notch of 45°, with a base radius of 0.25 mm and a depth of 2 mm, and a 10 mm rivet. This impact test equipment has a pendulum weight of 18 kg, a pendulum length of 700 mm, an initial knock position of 1450, has dimensions of 1500 mm in length, 350 mm in width, and 1200 mm in height. The first specimen has a cross-sectional area of 550 mm² at 0⁰C producing an impact energy of 212.131 J, and an impact value of 0.385 J/mm². The second specimen at 15 ⁰C produces an impact energy of 213.953 J and an impact value of 0.389 J/mm². The third specimen at 30 ⁰C produces an impact energy of 221.464 J and an impact value of 0.402 J/mm². The fourth specimen at 45 ⁰C produces an impact energy of 222.360 J and an impact value of 0.404 J/mm². The fifth specimen, at 60°C, produced an impact energy of 223.108 J, resulting in an impact value of 0.405 J/mm². Testing ASTM E23-standardized steel with varying temperatures revealed that steel becomes more brittle when exposed to low temperatures, and more ductile when exposed to high temperatures.
Limit Load Analysis with Finite Element Method in Two-Phase Separator Design According to Lazalde-Crabtree Prabowo, Bagas; Lubis, Asnawi; Akmal, Jamiatul Akmal; Pramono, Atik
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 7 No 2 (2026): Edisi Februari 2026
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36655/sprocket.v7i2.2151

Abstract

Penelitian ini menganalisis limit load pada desain separator dua fasa berdasarkan metode Lazalde-Crabtree menggunakan Metode Elemen Hingga (Finite Element Method/FEM). Separator dua fasa sebagai salah satu jenis bejana tekan sangat rentan mengalami kegagalan struktur akibat pengaruh tekanan internal. Studi dilakukan melalui pemodelan geometri separator tipe Bottom Outlet Cyclone (BOC), penentuan dimensi berdasarkan pendekatan Lazalde-Crabtree, penerapan material SA-106 Gr.B, serta analisis pembebanan nonlinier menggunakan ANSYS Mechanical APDL. Hasil penelitian menunjukkan bahwa batas elastis struktur separator terjadi pada tekanan 1,283 MPa (0,947 PD), sedangkan limit pressure tercapai pada tekanan 1,734 MPa (1,280 PD). Analisis juga mengungkap bahwa kegagalan struktur terjadi pada bagian inlet separator, sehingga diperlukan perkuatan khusus pada area tersebut untuk meningkatkan keamanan desain. Temuan ini memberikan dasar evaluasi penting untuk fabrikasi separator dua fasa pada aplikasi pembangkit listrik tenaga panas bumi.
Co-Authors A. Hadi, Kiagus Ahmad Su'udi Ahmad Su'udi Ahmad Su'udi Ahmad Suudi Ahmad Suudi Ahmad Suudi Ahmad Suudi Ahmad Su’udi Akmal, Jamiatul Akmal Alexander Sembiring An Nisa Magnolia Anang Ansyori anggi saputra Arisandi Arisandi Destarius Mahardhika Dewa Anom Pasmadi Dimas, Dimas Ega Setiawan Erwin Erwin Hadi, Kiagus Abdul Hartawan, Beny Hasymi, Zulhendfri Jamiatul Akmal Martinus, Martinus Muhammad Agus Muljanto Muhammad Rahardian Putra Murti, Adam Wisnu Novri Tanti Novri Tanti Novri Tanti Novri Tanti Novri Tanti Novri Tanti, Novri Nugraha, Nurcahya Nuryanto Nuryanto Panji Firmanul Hakim Prabowo, Bagas Pramono, Atik Riszal, Akhmad Tantri, Novri Wahyudi, Retno Yoki Surya Grahita Zaky Abyan Fahrain Zulhendri Hasymi