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All Journal Jurnal Rekayasa Mesin Jurnal Teknik Mesin Cakram Piston: Journal of Technical Engineering Jurnal Surya Teknika Tensile : Jurnal Pengabdian Kepada Masyarakat Jurnal Inovasi Teknologi Manufaktur, Energi dan Otomotif
Siregar, Ansor Salim
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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Pelatihan Peningkatan Kemampuan Siswa Smkn 1 Kragilan Pada Bidang Pengelasan Siregar, Ansor Salim; Rizal, Syaiful; Mudai, Ahmad; Putra, Bagas Andika; Ferdiansyah, Isa
Tensile : Jurnal Pengabdian Kepada Masyarakat Vol 1 No 2 (2023): Juli 2023
Publisher : Teknik Mesin ,Universitas Pamulang Serang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Data BPS (Badan Pusat Statistik) Kabupaten Serang menunjukkan bahwa setiap tahunnya jumlah penduduk terus bertambah dimana pada tahun 2020 penambahan jumlah tersebut 704618 Jiwa. Peningkatan jumlah kemiskinan di Kabupaten Serang juga terus meningkat yaitu 4.02% (2019), dan 4.94% (2020). Sehingga perlu sebuah metode untuk menghanbat hinnga menurunkan permasalahan yaitu mengurangi terjadinya pengangguran. Pembentukan kelompok – kelompok untuk dipersiapkan dengan memiliki basic soft skills and hard skills. Sebagaimana basic yang diterapkan yaitu melakukan pelatihan – pelatihan pengelasan di ruang lingkup Pendidikan salah satunya di SMKN 1 Kragilan dengan maksud agar setelah menjadi alumni dapat menghadapi dan berkolaborasi dengan dunia industri. Dari kegiatan pelatihan pengelasan yang dilaksanakan terlihat bahwa para siswa sangat antusias sebagaimana pada pelatihan ini secara pelaksanaan dibagi menjadi 3 yaitu teori, tanya jawab dan demonstrasi. Pencapaian target yang diterapkan pada pelatihan pengelasan sudah tercapai dimana para siswa telah memahami standarisasi safety welding engineering hingga bersedia membuat kelompok diskusi dengan mengaplikasikan hasil pelatihan yang dilaksanakan.
VARIASI KOMPOSISI SERAT BAMBU APUS DENGAN SERBUK AL, SiO2, DAN FLUOROCARBON UNTUK DASHBOARD MOBIL Wahyudin, Muhammad Ali; Siregar, Ansor Salim; Rohmat, Nur
Jurnal Teknik Mesin Cakram Vol. 6 No. 2 (2023)
Publisher : Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jtc.v6i2.40073

Abstract

Industri manufaktur komposit di Indonesia terus berkembang dalam hal peningkatan kualitas teknologi hingga produksi. Dalam industri penggunaan bahan komposit diguaakan dalam beberapa hal yaitu otomotif, kedirgantaraan, medis hingga alat olahraga olahraga. Bambu Apu apus merupakan tanaman mudah yang paling banyak manfaatnya dari segi alamiah maupun non alamiah sehingga pada penelitian ini memanfaatkannya serat bambu dan menambahkan silicon dioxide powder, alumunium powder, fluorocarbon powder diterapkan dalam persentase yang berbeda-beda dan sebagai metode yang digunakan Lay-Up. Menunjukkan hasil penelitian nilai rata-rata kekuatan tarik serat bambu apus yang tertinggi sebesar 106,34 N/mm2 variasi waktu 90 menit. Nilai tertinggi rata-rata pengujian tarik komposit terdapat pada spesimen 3 sebesar 79,751 N/cm2 jika menggunakan standar ASTM D 638 maka nilai minimumnya sebesar 20-40 N/cm2, maka pengujian ini memenuhi standar. Pengujian Impact nilai rata – rata keuletan terdapat pada komposisi spesimen 2 yaitu 20,39 Joule/m2, yang menggunakan standar ISO – 179 sebesar 13,48 Joule/m2 sehingga pengujian ini sudah memenuhi standar. Nilai rata-rata pada pengujian kekerasan paling optimal yaitu spesimen 3 dengan nilai 486,133 HL sebagai standar perbandingannya yang digunakan ISO 7619-1 dengan nilai 280 HL maka memenuhi standar. Nilai rata-rata tertinggi daya serap air di komposisi spesimen 2 dengan nilai sebesar 1,59%, Pada pengujian daya serap air standar yang digunakan ISO 62 yaitu 0,10%-0,50%.
Pemanfaatan Komposit Serat Bambu Jepang (Dracena Surculosa) dengan Penamban Material Powder Siregar, Ansor Salim; Ineza Putri, Sunny; Maulana, Indra; Abriandika, Venusa
JURNAL SURYA TEKNIKA Vol. 12 No. 1 (2025): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v12i1.9536

Abstract

The development of natural composites offers solutions to various material challenges, with bamboo being widely utilized as a reinforcement due to its economic value. This research investigates the influence of material mixture parameters by incorporating Japanese bamboo fibers as reinforcement, along with aluminum powder, silicon dioxide powder, fluorocarbon powder, and epoxy hardener. Bamboo fibers were extracted using a chemical method involving 5% NaOH at 70°C for varying durations. Composites were fabricated with different fiber volume fractions (26%, 32%, 38%). Impact tests on the composite materials revealed a maximum impact strength of 1.13 J/mm² with an absorbed energy of 152 Joules. The highest dd strength, 118.30 N/mm², was observed in composites with 26% fiber volume fraction. Hardness tests yielded a maximum value of 681.4 HLB for the 26% fiber variation while bending tests showed a peak result of 9.37 N/mm for the 32% fiber variation. Conversely, the water absorption test indicated the lowest absorption value of 0.56% in the 38% fiber variation.
Design of Helical Type Steam Generator for Experimental Power Reactor – Helium Side Putri, Sunny Ineza; Subekti, Mohammad; Martin, Awaludin; P, Brian Agung Cahyo; Hermanto, Jheri; Siregar, Ansor Salim
Piston: Journal of Technical Engineering Vol. 9 No. 1 (2025)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v9i1.51645

Abstract

Previous research has not analyzed the helium temperature distribution in the RDE steam generator shell. This study aims to fill that gap by analyzing these thermal characteristics with empirical calculations and Ansys Fluent simulations. The validity of the RDE steam generator design is reaffirmed, having been successfully analyzed from both the water-flow perspective in previous research and the helium-side perspective in the present study. The analytical methods used herein showed strong consistency, with empirical and numerical simulation results differing by less than 10% across all parameters. Although the calculated shell height of 5.73 m exceeds the RDE design's 4.97 m, the overall design's validity is confirmed.
Mechanical Contact Stress Analysis of Rollers at Various Hot Rolling Reductions Using Finite Element Approach Hanafi, Agung Fauzi; Siregar, Ansor Salim; Wisnu Wardhaanaa, Prabuditya Bhisma; Mega Lazuardi Umar
Jurnal Rekayasa Mesin Vol. 20 No. 3 (2025): Volume 20, Nomor 3, Desember 2025
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v20i3.7190

Abstract

Hot rolling is a fundamental process in metal manufacturing; however, the operational integrity of the rollers is frequently threatened by excessive stress, which can lead to premature fatigue failure. This study aims to quantitatively analyze the effect of the cross-sectional reduction percentage on the distribution and magnitude of equivalent (von Mises) stress in hot rolling rollers. The Finite Element Analysis (FEA) method was employed to simulate the rolling process on rollers made of Ductile Cast Iron and a Structural Steel billet at a temperature of 800°C. Eleven simulation scenarios were executed by varying the reduction from 22% (industry standard) to 44%. The results indicate that the standard 22% reduction yields a very safe stress level (157.36 MPa), which is only 46.5% of the roller material's fatigue strength (338 MPa). It was found that roller stress increases non-linearly with increasing reduction, with a significant stress surge observed after a 41% reduction. The maximum safe operational limit was identified at a 43% reduction, which produced a stress of 275.43 MPa (81.5% of the fatigue limit). At a 44% reduction, the roller stress (369.37 MPa) exceeded the safe limit, indicating a high risk of component failure. This study provides a practical quantitative guide for the industry to optimize production throughput by establishing 43% as the maximum theoretical reduction limit.
Analisis Komparatif Efektivitas Pahat Variable Helix Angle (VHA) dan Normal Helix Angle (NHA) untuk Pengendalian Regenerative Chatter pada Pemesinan CNC Milling Stainless Steel 304 Abriandika, Venusa; Siregar, Ansor Salim; Hanafi , Agung Fauzi; Saputra, Indra Adi
Jurnal Inovasi Teknologi Manufaktur, Energi dan Otomotif Vol. 4 No. 1 (2025): Jurnal Inovasi Teknologi Manufaktur, Energi, dan Otomotif
Publisher : Politeknik Negeri Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57203/jinggo.v4i2.2026.%p

Abstract

This study compares the effectiveness of Variable Helix Angle (VHA) and Normal Helix Angle (NHA) end mills in controlling regenerative chatter during CNC milling of stainless steel 304. Experiments were conducted across a range of cutting parameters, including cutting speed, feed per tooth, and axial depth of cut, using VHA and NHA tools with identical basic geometries except for the helix angle. Measurements were obtained for vibration signals using an accelerometer, machined surface roughness (Ra), and tool wear. Signal analyses, including Fast Fourier Transform (FFT) and Power Spectral Density (PSD), experimental construction of stability lobe diagrams, and statistical evaluation using ANOVA, were employed to assess the influence of helix angle on stability limits and surface quality. The results are expected to determine whether VHA tools offer significant improvements in chatter suppression and expand the stable cutting region compared to NHA tools, as well as their implications for productivity and tool life when machining SS304. The findings provide practical recommendations for selecting cutter geometry in industrial applications where regenerative chatter poses a critical challenge.
Co-Authors Abriandika, Venusa Awaludin Martin Ferdiansyah, Isa Hanafi , Agung Fauzi Hanafi, Agung Fauzi Indra Maulana, Indra Jheri Hermanto Mega Lazuardi Umar Mudai, Ahmad Nur Rohmat P, Brian Agung Cahyo Putra, Bagas Andika Saputra, Indra Adi Subekti, Mohammad Sunny Ineza Putri Syaiful Rizal Wahyudin, Muhammad Ali Wisnu Wardhaanaa, Prabuditya Bhisma