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All Journal INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Martabe : Jurnal Pengabdian Kepada Masyarakat JURNAL PENDIDIKAN TAMBUSAI Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Jurnal Pengabdian Masyarakat Multidisiplin Teknomekanik Jurnal Vokasi Mekanika Tsaqofah: Jurnal Penelitian Guru Indonesia ALSYS : Jurnal Keislaman dan Ilmu Pendidikan MASALIQ: Jurnal Pendidikan dan Sains Al-DYAS : Jurnal Inovasi dan Pengabdian kepada Masyarakat Journal of Engineering Researcher and Lecturer Journal of Innovative and Creativity
Zainal Abadi
Universitas Negeri Padang
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Transportation Other

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Analisis Komparatif Metode Rayleigh dan Dunkerley terhadap Hasil Simulasi Numerik Sistem Poros Dua Disk Berbasis ANSYS Yopi Zekri Jenizah Putra; Delima Yanti Sari; Waskito Waskito; Zainal Abadi
Journal of Innovative and Creativity Vol. 5 No. 2 (2025)
Publisher : Fakultas Ilmu Pendidikan Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joecy.v5i2.2699

Abstract

Penelitian ini bertujuan untuk melakukan analisis komparatif terhadap dua pendekatan analitik klasik, yaitu metode Rayleigh dan Dunkerley, dalam berasumsi frekuensi alami sistem poros berputar dengan dua cakram simetris. Evaluasi dilakukan untuk menilai seberapa akurat kedua metode tersebut jika dibandingkan dengan hasil simulasi numerik berdasarkan metode elemen hingga. Perhitungan analitik dilakukan berdasarkan parameter geometri dan sifat mekanik poros baja AISI 4140, serta konfigurasi massa cakram yang umum digunakan pada alat praktikum putaran kritis. Selanjutnya, hasil estimasi frekuensi alami dari masing-masing metode divalidasi melalui simulasi numerik menggunakan perangkat lunak ANSYS Workbench dengan prosedur modal analysis . Hasil menunjukkan bahwa metode Rayleigh memberikan estimasi frekuensi alami sebesar 80,58 Hz, dengan deviasi kurang dari 0,1% terhadap hasil simulasi numerik sebesar 80,495 Hz. Sementara itu, metode Dunkerley menghasilkan estimasi sebesar 79,11 Hz, yang menunjukkan deviasi lebih besar. Temuan ini menunjukkan bahwa metode Rayleigh memiliki tingkat akurasi yang lebih tinggi dan dapat dijadikan sebagai pendekatan awal yang Andal dalam proses perancangan sistem poros dinamis, khususnya pada tahap awal analisis sebelum dilakukan simulasi numerik lanjutan.
Analisis Benturan Depan dan Benturan Samping terhadap Kinerja Struktur Rangka Tubular mobil Buggy Menggunakan Metode Elemen Hingga Muhammad Aulia Anugrah; Zainal Abadi; Waskito Waskito; Delima Yanti Sari
Journal of Innovative and Creativity Vol. 5 No. 3 (2025)
Publisher : Fakultas Ilmu Pendidikan Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joecy.v5i3.4309

Abstract

Rangka tubular merupakan komponen utama pada kendaraan off-road tipe buggy yang berfungsi sebagai penopang beban statis dan dinamis serta menentukan keselamatan pengemudi dan performa kendaraan. Penelitian ini bertujuan untuk menganalisis pengaruh beban benturan depan (frontal) dan benturan samping (lateral) terhadap kinerja struktural rangka tubular buggy menggunakan Metode Elemen Hingga (Finite Element Method/FEM) dengan bantuan perangkat lunak ANSYS Workbench. Variasi material yang digunakan meliputi baja karbon AISI 1018, baja ASTM A572 Grade 50, dan aluminium 6061 dengan variasi geometri diameter dan ketebalan pipa. Parameter yang dianalisis meliputi deformasi total, tegangan Von Mises, dan faktor keamanan (safety factor). Hasil simulasi menunjukkan bahwa benturan samping menghasilkan deformasi dan tegangan maksimum yang lebih tinggi dibandingkan benturan depan, terutama pada material dengan ketebalan pipa yang lebih kecil. Aluminium 6061 memberikan performa terbaik dilihat dari faktor keamanan tertinggi dan tegangan terendah, menandakan potensi penggunaannya sebagai material optimal untuk rangka buggy. Penelitian ini menyimpulkan bahwa pemilihan material dan desain geometri yang tepat sangat krusial dalam meningkatkan kekuatan dan keselamatan rangka tubular untuk aplikasi off-road di medan ekstrem. Temuan ini dapat menjadi acuan dalam pengembangan desain rangka kendaraan off-road yang ringan, kuat, dan aman.
Analisis Numerik Kekuatan Reaktor Pirolisis Menggunakan Software Ansys Tasyah Tasyah; Dori Yuvenda; Delima Yanti Sari; Zainal Abadi
Journal of Innovative and Creativity Vol. 5 No. 3 (2025)
Publisher : Fakultas Ilmu Pendidikan Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joecy.v5i3.4479

Abstract

Permasalahan limbah plastik di Indonesia yang terus meningkat menjadi ancaman lingkungan serius karena sifatnya yangsulit terurai. Salah satu solusi yang dapat diterapkan adalah teknologi pirolisis, yaitu proses konversi limbah plastik menjadibahan bakar cair melalui pemanasan tanpa oksigen. Kinerja reaktor pirolisis sangat dipengaruhi oleh kemampuanstrukturnya dalam menahan beban termal dan tekanan internal selama proses berlangsung. Penelitian ini bertujuan untukmenganalisis distribusi tegangan Von Mises pada reaktor pirolisis dengan ketebalan dinding 3 mm menggunakan metodeFinite Element Analysis (FEA) berbasis simulasi ANSYS. Dua jenis material digunakan dalam analisis, yaitu Stainless Steel304 dan Baja Karbon AISI 1045. Reaktor diberikan beban tekanan internal sebesar 0,1 MPa dengan suhu operasi 462°C.Hasil simulasi menunjukkan bahwa tegangan Von Mises tertinggi terjadi pada area sambungan antara silinder utama danpenutup reaktor. Nilai maksimum tegangan Von Mises untuk Stainless Steel 304 sebesar 139,72 MPa dan faktor keamanandengan nilai 1.4672, sedangkan untuk Baja Karbon AISI 1045 mencapai 2277,8 MPa dengan faktor keamanan sebesar0,1361. Dengan demikian, Stainless Steel 304 memiliki performa yang lebih baik karena nilai tegangannya masih di bawahbatas kekuatan luluh material, sehingga lebih aman untuk digunakan dalam operasi reaktor pirolisis skala kecil hinggamenengah.
Analisis Cacat Pengelasan SMAW pada Baja AISI 1040 dengan Metode Bending Test Ibnu Hafiz Wardhana; Zainal Abadi; Waskito Waskito; yahril yahril
Journal of Innovative and Creativity Vol. 5 No. 3 (2025)
Publisher : Fakultas Ilmu Pendidikan Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joecy.v5i3.4553

Abstract

This study aims to evaluate the quality of AISI 1040 medium carbon steel welds using the Shielded Metal Arc Welding (SMAW) method with a V-groove through bending tests. The tests were conducted to assess the weld's ability to withstand plastic deformation due to bending loads and the effect of defects on weld integrity. The testing procedure refers to the ASTM E290 and AWS D1.1 standards. Of the seven specimens tested, four of them—Face 3, Root 1, Root 2, and Root 3—passed the test without defects, indicating good fusion between the weld metal and the base metal. Meanwhile, Face 1, Face 2, and Face 4 experienced small cracks in the Heat Affected Zone (HAZ) due to undercut and slag inclusion. The Root 1 specimen recorded the highest maximum load of 16,343.46 N. Overall, the SMAW weld joint with a V groove on AISI 1040 steel showed good flexural strength and met structural feasibility standards.
WORKSHOP TEKNOLOGI 3D PRINTING BAGI GURU KEJURUAN DI SMK NEGERI 1 BATIPUH Rifelino Rifelino; Eko Indrawan; Zainal Abadi
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 5, No 4 (2022): Martabe : Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v5i4.1560-1566

Abstract

Additive Manufacturing adalah salah satu teknologi yang sedang berkembang untuk membuat produk-produk prototipe dengan memanfaatkan badan aditif tertentu. Fused Deposition Modelling merupakan jenis mesin 3D printing yang populer dengan menggunakan filamen PLA (polylactid acid) atau ABS (acrylonitrile butadiene styrene) sebagai bahan tambahan untuk membuat objek dalam bentuk 3 dimensi. Teknologi ini sangat berguna dalam membuat media pembelajaran purwarupa bagi siswa di sekolah kejuruan. Workshop pengenalan teknologi ini serta prosedur operasionalnya diperkenalkan kepada bagi guru-guru kejuruan di SMK Negeri 1 Batipuh, Kabupaten Tanah Datar, Sumatera Barat. Tahapan dimulai dengan desain objek 3 dimensi menggunakan aplikasi CAD (Computer Aided Design), selanjutnya pengaturan parameter cetak pada perangkat lunak slicer CURA dan finalisasi proses cetak pada mesin 3D printing. Hasil cetak berupa prototype kombinasi roda gigi dan objek label nama sekolah dihasilkan pada sesi akhir pelatihan. Dengan prosedur yang tepat dan kombinasi kreatifitas desain objek, alat ini mampu memberikan alternatif solusi dalam menciptakan media-media pembelajaran purwarupa bagi guru dan siswa di sekolah.
Hubungan Pemahaman Teori dan Fasilitas Kerja terhadap Prestasi Praktek Pengefraisan Kelas XI Teknik Permesinan SMK Negeri 1 Lembah Melintang Rizaldi, Ahmad; Purwantono, Purwantono; Syahri, Budi; Abadi, Zainal
TSAQOFAH Vol 5 No 3 (2025): MEI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/tsaqofah.v5i3.5619

Abstract

This study aims to determine the relationship between the understanding of milling machining theory and work facilities on the practical performance of eleventh-grade students in the Machining Engineering program at SMK Negeri 1 Lembah Melintang. The method used in this study is quantitative with a correlational approach. Data were collected through observation, documentation, and the distribution of questionnaires, then analyzed using simple regression and multiple regression. The results indicate a positive relationship between the understanding of milling machining theory and practical performance in milling machining, with a correlation coefficient of 0.357. Work facilities also show a positive relationship with practical performance, with a correlation coefficient of 0.242. Additionally, the results of the multiple regression analysis indicate that the understanding of milling machining theory and work facilities together positively relate to practical performance in milling machining, with a correlation coefficient of 0.402. The effective contribution of both variables to practical performance is 16%, with a relative contribution of understanding theory at 11.5% and work facilities at 4.5%. These findings suggest that improving theoretical understanding and providing adequate work facilities can enhance students' practical performance in milling.
Persepsi Siswa tentang Kompetensi Mengajar Mahasiswa Program Pengalaman Lapangan Kependidikan (PPLK) di Kelas XI SMK Negeri 1 Sumatera Barat Putra, Kevinda; Fernanda, Yolli; Abadi, Zainal; Andri, Junil
TSAQOFAH Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/tsaqofah.v5i4.6661

Abstract

This study is motivated by the importance of evaluating the teaching competencies of students participating in the Teaching Practice Field Experience Program (PPLK) as an integral component in enhancing the quality of future educators. The purpose of this research is to describe students’ perceptions of the teaching competencies of PPLK students from the Faculty of Engineering, Universitas Negeri Padang, who conducted teaching practice in Grade XI at SMK Negeri 1, West Sumatra. A descriptive method with a quantitative approach was used. Data were collected through a closed-ended questionnaire using a four-point Likert scale, covering a single variable: student perception. This variable was measured through four indicators: teaching skills, knowledge, physical condition, and personality of the PPLK students. The research population consisted of all students in the Mechanical Engineering department, with simple random sampling employed for sample selection. Validity testing was conducted using the Product Moment correlation, and reliability was tested using Cronbach’s Alpha, assisted by SPSS version 25. Data were analyzed descriptively and presented as percentages. The results indicate that students’ perceptions of PPLK students’ teaching competencies fall within the "very good" category, with a percentage of 77.66%. These findings suggest that PPLK students were able to conduct the teaching and learning process effectively and were positively received by students. The implications of this study are expected to contribute to the development of a more systematic and high-quality PPLK program.
Numerical Simulation of Natural Frequency on Shaft Using ANSYS Software Yopi Zekrri Jenizah Putra; Delima Yanti Sari; Waskito Waskito; Zainal Abadi
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 3 (2025): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v7i3.883

Abstract

This descriptive study aims to analyze the effect of shaft diameter on the natural frequency and maximum deformation of a rotating shaft system. The analysis was conducted through numerical simulation using ANSYS Workbench software. The shaft and two symmetrically positioned disks were modeled, and a modal analysis was performed using the Finite Element Method (FEM) to determine the system’s first ten vibration modes. Simulation results showed that the natural frequencies ranged from 80.495 Hz to 280.4 Hz, with a maximum deformation of 58.903 mm occurring in the 9th mode. The lower modes (modes 1–6) exhibited lower frequencies but higher deformation, while higher modes (modes 7–10) showed more complex vibration patterns with consistently significant deformation values. This indicates that higher frequency does not necessarily result in lower deformation, and the system may still experience critical vibration. These findings demonstrate that the shaft's geometric configuration, including diameter and mass distribution of the disks, significantly affects its dynamic behavior. The simulation provides deeper insight into the vibration characteristics of the critical speed shaft apparatus used in practical experiments and serves as a reference for validating theoretical approaches such as the Dunkerley and Rayleigh methods.
Analysis of the Effect of Feed Rate, Spindle Speed and Coolant on Surface the Roughness of ST 37 Steel in the Turning Process Rahmatul Fauzan Mulyadi; Syahril; Rifelino; Zainal Abadi
Jurnal Vokasi Mekanika (VoMek) Vol 8 No 2 (2026): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/epr1f741

Abstract

Surface roughness is an important parameter in turning processes, as it directly affects the performance and service life of mechanical components. This study aims to examine the influence of feed rate, spindle speed, and coolant application on the estimated surface roughness (Raest) of ST 37 steel under conventional turning conditions. A 2³ full factorial experimental design was employed, involving eight treatment combinations consisting of two feed rate levels (0.040 and 0.100 mm/rev), two spindle speed levels (315 and 400 rpm), and two cooling conditions (with and without coolant). Surface roughness estimation was carried out using digital image analysis with ImageJ software based on optical microscope images. The analysis utilized gray-level intensity distributions, which were then converted into roughness values using an empirical scaling approach. The results indicate that increasing the feed rate led to a rise in Raest ranging from 1.74% to 7.11%, while higher spindle speeds contributed to an increase in surface roughness between 4.54% and 11.91%. In contrast, the use of coolant reduced surface roughness by an average of 9.20%, mainly due to its role in minimizing heat and friction during machining. The optimal parameter combination was obtained at a spindle speed of 315 rpm and a feed rate of 0.040 mm/rev with coolant, producing an Raest value of 1.495 µm, which falls within ISO roughness class N7. Overall, all specimens were classified within ISO N7, indicating a semi-finishing surface quality.
Effect of Rice Husk Ash and Clay Powder as Cooling Media in Post Weld Heat Treatment (PWHT) on The Impact Toughness of SMAW-Welded SS400 Steel Angga Hermawansyah; Zainal Abadi; Delima Yanti Sari; Rifelino
Jurnal Vokasi Mekanika (VoMek) Vol 8 No 2 (2026): Jurnal Vokasi Mekanika
Publisher : Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/f6gkaq38

Abstract

This study investigates the effect of variations in cooling media during Post Weld Heat Treatment (PWHT) on the impact toughness of low carbon steel SS400. The main problem addressed in this research is how differences in cooling medium characteristics influence the cooling rate, which subsequently affects the impact toughness of welded material. The objective of this study is to determine the effect of using rice husk ash, clay, and air as cooling media on the impact toughness value of SS400 steel. The experimental method was employed by applying PWHT to SMAW-welded specimens, followed by Charpy impact testing to obtain the final deflection angle, which was then converted into impact energy and impact value (HI). The results show that clay cooling medium provides the highest average impact toughness value of 1.175 J/mm², followed by rice husk ash at 1.107 J/mm², while air cooling yields the lowest value of 0.845 J/mm². These differences indicate that the thermal characteristics of the cooling media significantly influence the material’s ability to absorb energy before fracture, which is related to the stability of the cooling rate during the PWHT process. It can be concluded that variations in cooling media affect the impact toughness of SS400 steel, where more stable cooling conditions lead to higher toughness values.
Co-Authors - Primawati Afriza Media Ahlal Fikri, Rivandy Akbar, Irfan Muhammad Akbar, M. William Alan Putra Ambyar Ambyar Ananda, Opi Andre Kurniawan Andre Kurniawan Andri, Junil Andrian Saputra Angga Hermawansyah Anggara, Diki Anwar, Roki Putra Arafat, Andril Arif Rachman Hakim Arifin Jannuar Arwizet Arwizet, Arwizet Aslfattahi, Navid Berry Delfi Andra Budi Syahri Bulkia Rahim Daffa Raihan Senthot Delima Yanti Sari Dicky Pratama Fernando Dori Yuvenda Eko Indrawan Enggian Lubis Erizon, Nelvi Fathur Rahman fatur Rahman, fatur Fauza, Anna Niska Febri Prasetya Fiki Efendi Fikriyyah Hilmy Ardana Firdaus Firdaus Fitra, Dinul Fonny Maswija Priscilla Ghozali, Rahmatul Gifan Ainul Mukhrim Gilang Sanjaya Habib Indra Satrianto Habibie Habibie Hafizd Syahiran nst Hakiim, Evan Ibnu Hafiz Wardhana Imam Qulugqin Azhim Indra, Yoan Alfarezy Irma Yulia Basri Irzal Irzal Irzal, Irzal Jasman Jasman Jasman Kurniawan, Muhammad Ridwan Miswar Miswar Muhammad Aulia Anugrah Muhammad Iqbal Muhammad Iqrha Muhammad Riski Hidayat Muhammad Subakti Muharam, Bananda Mulianti Mulianti Mustaqin, Iqbal Nabawi, Rahmat Azis Nanang Qosim Nelvi Erizon Nensy Aryasandy Nofri Pratama Putra Nur Ichsan Abdillah Nurdin Hendri Pratama, Yuhanda Dicky Primawati Primawati, Primawati Purwantono Purwantono purwantono purwantono Purwantono, Purwantono Putra, Kevinda Putra, Randi Purnama Putra, Rido Rahmad Robby Alzam Rahmadiawan, Dieter Rahmat Mardiansyah Putra Rahmatul Fauzan Mulyadi Ramadhan, Athaya Ramadhan, Qadri Refdinal, Refdinal Refelino, Refelino Remon Lapisa Ressi Novia Windri Rifai Adlani, M. Rifaldo Novembli Rifelino Rifelino Rifelino Rifelino Rifelino Riki Ardianto Rilgy Aulia Rizaldi, Ahmad Rizky Ema Wulansari Rozaki Yudha, Hatami Salwa Chairani Santos, Thiago F. Saputra, Muhammad Pandi Shi, Shih-Chen Susi Marisa Syahril Syahril Syahril Syaputra, Afzan Syauqi Arjunanda Tasyah Tasyah Taufiqul Hamid Teki Haryono Wahyu Ivan Pramana Wahyu Pratama Wahyudi Wahyudi Wanda Afnison Waskito Waskito Waskito Waskito Waskito, Waskito yahril yahril Yandi Saputra Yolli Fernanda Yopi Zekri Jenizah Putra Yopi Zekrri Jenizah Putra Yufrizal Yufrizal Yufrizal Yufrizal, Yufrizal Zhuang, Wei-Ting