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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 Teknomekanik Jurnal Vokasi Mekanika 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 Innovation in Engineering
Zainal Abadi
Universitas Negeri Padang
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Social Sciences Transportation Other

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Numerical Simulation of Natural Frequency on Shaft Using ANSYS Software Putra, Yopi Zekrri Jenizah; Sari, Delima Yanti; Waskito, Waskito; Abadi, Zainal
Jurnal Vokasi Mekanika (VoMek) Vol 7 No 3 (2025): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik 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.
Pelatihan Software Inventor Dalam Meningkatkan Kompetensi Guru Sekolah Menengah Kejuruan Di Sumatera Barat Karudin, Arwizet; Basri, Irma Yulia; Lapisa, Remon; Abadi, Zainal; Putra, Rido; Ananda, Opi
Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Vol 22, No 1 (2022): Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/sb.01970

Abstract

Salah satu kompetensi krusial yang harus dikuasai oleh guru di era digital saat ini adalah penguasaan aplikasi komputer sebagai alat bantu dalam menggambar teknik. Autodesk Inventor termasuk salah satu software yang paling banyak digunakan baik oleh praktisi industri, peneliti maupun untuk keperluan edukasi. Tujuan penelitian ini adalah melakukan analisis efektifitas pelatihan software Auto Desk Inventor bagi tenaga pengajar matakuliah mengambar teknik di Sekolah Menengah Kejuruan di Sumatera Barat. Pelatihan ini menggunakan metode klasikal-demonstrasi dengan kegiatan berbasis project. Peserta diberi materi secara tersistematis dan dilanjutkan dengan tugas perancangan komponen mesin. Hasil penelitian menunjukan bahwa pelatihan software Auto Desk Inventor ini memberikan kontribusi dalam peningkatan kompetensi guru dalam bidang menggambar Teknik secara digital. Disamping itu, pengukuran tingkat kepuassan peserta menunjukan bahwa manajemen pelaksanaan kegiatan dan fasilitas pelatihan masuk dalam kategori sangat baik. Melalui pelatihan ini, diharapkan kemampuan tenaga pengajar mengalami peningkatan yang signifikan untuk menciptakan lulusan yang berkualitas dan berdaya saing.
The Influence Of Infill Pattern, Layer Height, And Infill Density On Tensile Strength Of 3D Printed Polylactic Acid (PLA) Filament Muharam, Bananda; Rifelino, Rifelino; Yufrizal, Yufrizal; Abadi, Zainal
Jurnal Pendidikan Tambusai Vol. 8 No. 3 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

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Abstract

Perkembangan teknologi telah menawarkan kemudahan dalam berbagai bidang, salah satu teknologi yang mengalami kemajuan yang cukup pesat adalah teknologi 3D printing. Teknologi ini menawarkan kemudahan memproduksi benda dengan desain yang rumit dan beragam sesuai keinginan. Namun yang masih menjadi permasalahan penerapan 3D printing yaitu kualitas hasil cetakan yang dipengaruhi oleh pengaturan parameter proses seperti infill pattern, layer height, dan infill density. Pengetahuan tentang pengaruh yang diberikan oleh parameter proses yang digunakan sangat dibutuhkan untuk menghasilkan produk yang berkualitas. Maka penelitian ini bertujuan untuk mengetahui parameter proses yang paling berpengaruh terhadap kekuatan tarik material. Penelitian menggunakan jenis penelitian kuantitatif dengan metode eksperimen, spesimen dicetak sebanyak dua puluh tujuh buah dengan memvariasikan infill pattern, layer height, dan infill density dengan menggunakan material PLA. Penelitian ini menggunakan pengujian tarik, berdasarkan pengujian yang dilakukan nilai kekuatan tarik terendah yaitu 13.50 N/ dengan kombinasi parameter infill pattern triangles, layer height 0.10 mm, infill density 75%. Nilai kekuatan tarik tertinggi sebesar 25.76 N/ dengan kombinasi parameter infill pattern grid, layer height 0.30 mm, dan infill density 75% menjadi kombinasi parameter yang disarankan untuk mencetak produk 3D printing. Berdasarkan P-value pada ANOVA, menunjukkan bahwa ketiga parameter cetak secara signifikan berpengaruh terhadap kekuatan tarik produk, karena kecil dari 0.05 dengan kontribusi terbesar pada infill density 48.20%, diikuti layer height sebesar 30.49, dan infill pattern sebesar 7.62%.
Analisis Stabilitas Termal Dan Kekuatan Tarik Komposit Serat Menggunakan Unsaturated Polyester Resin Berpenguat Serat Ampas Tebu, Serat Daun Nanas, Dan Serat Pelepah Pisang Rozaki Yudha, Hatami; Abadi, Zainal; Arafat, Andril; Rifelino, Rifelino
Jurnal Pendidikan Tambusai Vol. 8 No. 3 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

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Abstract

Penelitian ini mengkaji stabilitas termal dan kekuatan tarik komposit hybrid yang menggunakan serat ampas tebu, daun nanas, dan pelepah pisang dengan matriks unsaturated polyester resin. Tujuannya adalah untuk mengevaluasi karakteristik mekanik dan termal material komposit sebagai alternatif ramah lingkungan pada komponen otomotif. Metode penelitian melibatkan proses *hand lay-up* dengan variasi fraksi volume serat (20%, 30%, 40%), dilanjutkan dengan uji tarik dan uji TGA sesuai standar ASTM D638 dan ASTM E1131-20. Hasilnya menunjukkan bahwa fraksi serat 40% menghasilkan kekuatan tarik tertinggi (24,78 MPa), sedangkan fraksi serat 30% mencapai stabilitas termal optimal pada suhu 435,9°C. Implikasi penelitian ini menunjukkan bahwa komposit hybrid tersebut dapat diaplikasikan sebagai bahan cover knalpot motor karena memenuhi persyaratan mekanik dan termal, sehingga berpotensi menggantikan bahan sintetis yang kurang ramah lingkungan.
Analisis Kekuatan Tarik Dan Bending Produk Caliper Bracket Motor Berbahan Limbah Aluminium Hasil Sand Casting Ahlal Fikri, Rivandy; Abadi, Zainal; Syahri, Budi; Afnison, Wanda
Jurnal Pendidikan Tambusai Vol. 8 No. 3 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

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Abstract

Penelitian ini bertujuan untuk menganalisis kekuatan tarik dan bending dari caliper bracket motor yang diproduksi menggunakan limbah aluminium melalui metode sand casting. Aluminium daur ulang digunakan sebagai bahan utama karena sifatnya yang ringan dan kemudahan dalam pembentukan ulang. Proses penelitian diawali dengan peleburan aluminium dan pengecoran ke dalam cetakan pasir yang dipadatkan menggunakan bentonite sebagai pengikat. Setelah produk caliper bracket terbentuk, pengujian dilakukan melalui uji tarik dan uji bending menggunakan Universal Testing Machine (UTM). Uji tarik digunakan untuk menentukan tegangan dan modulus elastisitas, sedangkan uji bending menilai kemampuan material menahan beban lentur hingga terjadi deformasi permanen. Hasil pengujian menunjukkan bahwa caliper bracket hasil sand casting memiliki nilai kekuatan tarik rata-rata sebesar 10,53 MPa, lebih tinggi dibandingkan produk standar pabrik sebesar 6,44 MPa. Untuk uji bending, rata-rata kekuatan bending pada produk hasil casting mencapai 149,994 MPa, yang juga lebih tinggi dari produk standar sebesar 135,673 MPa. Temuan ini menunjukkan bahwa pemanfaatan limbah aluminium dengan metode sand casting dapat menghasilkan produk dengan kekuatan yang memadai dan layak untuk digunakan dalam komponen otomotif.
Studi Eksperimental Kekerasan Dan Tarik Pada Produk Handle Rem Berbahan Limbah Aluminium Hasil Sand Casting Ramadhan, Qadri; Abadi, Zainal; Niska Fauza, Anna; Irzal, Irzal
Jurnal Pendidikan Tambusai Vol. 8 No. 3 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

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Abstract

Penelitian ini bertujuan mengevaluasi potensi limbah aluminium sebagai bahan baku pembuatan produk handle rem sepeda motor melalui metode sand casting. Penelitian dilakukan dengan pendekatan eksperimental, menganalisis sifat mekanik, termasuk kekerasan dan kekuatan tarik produk. Limbah aluminium dari kampas rem dan kaleng minuman didaur ulang, diuji menggunakan alat uji Rockwell untuk kekerasan dan Universal Tensile Machine untuk kekuatan tarik. Hasil menunjukkan bahwa produk handle rem dari limbah aluminium memiliki nilai rata-rata kekerasan 34,6 HRA, lebih tinggi dibandingkan standar variasi sebesar 21,65 HRA. Nilai kekuatan tarik produk hasil casting mencapai rata-rata 7,66 MPa, mengungguli produk standar dengan rata-rata 6,44 MPa. Penelitian ini menunjukkan bahwa pemanfaatan limbah aluminium dapat menghasilkan produk berkualitas tinggi sekaligus mengurangi dampak lingkungan. Implikasi penelitian mencakup potensi inovasi bahan daur ulang dalam industri otomotif.  
Study of the effective fraction of areca nut husk fibre composites based on mechanical properties Akbar, Irfan Muhammad; Fauza, Anna Niska; Abadi, Zainal; Rahmadiawan, Dieter
Journal of Engineering Researcher and Lecturer Vol. 3 No. 1 (2024): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v3i1.126

Abstract

Areca nut husk fibers have the potential to be used as reinforcement in polymer composites as a substitute for synthetic fibres. In the manufacture of fibre composites, one of the important factors in determining the strength is the matrix to fibre ratio. This study aims to determine the effective ratio or fraction between areca nut husk fibre and orthophthalic polyester resin. Before using areca nut husk fibre, it was chemically treated so that only cellulose remained in the fibre. The areca nut husk fibre was processed into sheets. The composite was manufactured using the hand lay-up technique. Tensile and flexural tests were carried out to determine the mechanical properties. Based on the results of the tests conducted, there are differences in the mechanical properties of the composites. The tensile test results show that the 40% fibre fraction has the highest tensile strength and modulus values. On the other hand, in the flexure tests, the highest tensile strength and modulus values are found in the 30% fibre fraction.
Analysis and control of occupational safety risks using the HIRARC method in the Machining Workshop Anwar, Roki Putra; Kurniawan, Andre; Mulianti; Abadi, Zainal
Journal of Engineering Researcher and Lecturer Vol. 3 No. 2 (2024): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v3i2.142

Abstract

This qualitative study focuses on occupational safety and health in vocational school machining workshops to identify significant risks related to training practices. Workplace accidents are considered a serious threat to workers and equipment, potentially affecting productivity and environmental safety. Observations at several vocational schools, especially at SMK Negeri 1 Batipuh, showed low student awareness and compliance with OHS regulations, increasing the risk of risky behaviour and accidents. To address this, the research used the Hazard Identification, Risk Assessment, and Risk Control (HIRARC) method, which systematically identifies hazards, evaluates risks based on severity and likelihood, and proposes control measures. The research at SMK Negeri 1 Batipuh involved direct observation, interviews, and analysis of SOPs in the workshop, finding significant risk variations in workshop conditions, lathe operations, welding, material handling, hand tool use, and machine protection. The results highlighted the predominance of intermediate risks in all-hazards analyzed, emphasizing the importance of developing more effective risk management strategies. This research aims to reduce accidents and improve student safety during training by addressing existing OHS implementation gaps and implementing appropriate risk controls. In addition to filling a gap in the literature, this study provides practical insights for improving OHS practices in vocational schools.
Tensile strength study of mensiang (scirpuss grossus) fibre composites with unsaturated polyester resin matrix Hakiim, Evan; Nurdin, Hendri; Abadi, Zainal; Zhuang, Wei-Ting
Journal of Engineering Researcher and Lecturer Vol. 4 No. 1 (2025): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v3i3.164

Abstract

The mensiang (scirpuss grossus) is a plant that grows on moist and watery land. Mensiang plants are commonly used by the society to produce mats or bags that have a strong and durable texture. This mensiang plant has fibres that can be used as reinforcement in polymer composites as a substitute for synthetic fibres. In composite manufacturing, one of the important factors in determining strength is the fraction between fibre and matrix. This study was conducted to determine the effect of different volume fractions of composites on the tensile strength of mensiang fibre reinforcement. Extraction of fibre from the stem of the mensiang plant was done manually by combing, so that the fibre was obtained. The fibres were then naturally dried by the sun for 2-3 days. The composite manufacturing process was carried out by using the hand lay-up method. Specimens and tensile testing procedures refer to the ASTM D638 standard. Several specimens were made by varying the fibre and matrix fractions. The test results showed that the 12.5% fibre volume fraction had the highest tensile strength. In this study there was no chemical treatment on the fibres before the lamination process, thus, this can be suggested for future researchers to study on the effect of chemical treatment on mensiang fibres on fibre bonding with the matrix.
The effectiveness of the STAD Cooperative Learning Method assisted by Flashcard Media in improving students’ learning outcomes Indra, Yoan Alfarezy; Prasetya, Febri; Primawati, Primawati; Abadi, Zainal
Journal of Engineering Researcher and Lecturer Vol. 4 No. 2 (2025): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v4i2.187

Abstract

This study explores the effectiveness of the Student Teams Achievement Divisions (STAD) cooperative learning model, supported by flashcard media, in enhancing student learning outcomes in Manufacturing Technical Drawing at SMK Negeri 1 West Sumatra. A quasi-experimental control group design was employed, where the experimental group used the STAD method integrated with flashcards, and the control group received traditional lecture-based instruction. Post-test results showed that the experimental group significantly outperformed the control group, achieving a higher mean score of 79.68 compared to 63.84, with an N-Gain score of 50.81%, indicating moderate improvement. The study found that the STAD model, combined with flashcards, boosted academic achievement and promoted more consistent and equitable learning outcomes. Flashcards played a vital role by simplifying complex concepts and enhancing student engagement. This study fills a gap in vocational education by demonstrating the effectiveness of combining cooperative learning and visual aids in technical education. The research offers valuable insights for educators in similar contexts, proposing a cost-effective and scalable instructional method that can be applied across various technical disciplines. However, the study’s limitation lies in its short-term implementation, and further research is needed to explore the long-term effects of this combined learning strategy.
Co-Authors Afriza Media Ahlal Fikri, Rivandy Akbar, Irfan Muhammad Akbar, M. William Ambyar, Ambyar Ananda, Opi Andre Kurniawan Andre Kurniawan Andrian Saputra Anggara, Diki Anwar, Roki Putra Arafat, Andril Ardianto, Riki ARIF RACHMAN HAKIM Arifin Jannuar Arwizet Arwizet, Arwizet Aslfattahi, Navid Berry Delfi Andra Budi Syahri Bulkia Rahim Daffa Raihan Senthot Daffa Raihan Senthot Delima Yanti Sari Dori Yuvenda Eko Indrawan Enggian Lubis Erizon, Nelvi Fathur Rahman fatur Rahman, fatur Fauza, Anna Niska Febri Prasetya Fernando, Dicky Pratama Fiki Efendi Fikriyyah Hilmy Ardana Firdaus Firdaus Fitra, Dinul Fonny Maswija Priscilla Ghozali, Rahmatul Gifan Ainul Mukhrim Habibie Habibie Hakiim, Evan Hamid, Taufiqul Hendri Nurdin Ibnu Hafiz Wardhana Indra, Yoan Alfarezy Iqrha, Muhammad Irma Yulia Basri Irzal Irzal Irzal, Irzal Jasman Jasman Jasman Jasman Kurniawan, Muhammad Ridwan Laksono Trisnantoro Marisa, Susi Muhammad Aulia Anugrah Muhammad Riski Hidayat Muharam, Bananda Mulianti Mulianti Mustaqin, Iqbal Nabawi, Rahmat Azis Nanang Qosim Nelvi Erizon Nensy Aryasandy Nofri Pratama Putra nst, Hafizd Syahiran Nur Ichsan Abdillah Nurdin Hendri Nurwijayanti Pratama, Yuhanda Dicky Primawati Primawati Primawati Primawati, Primawati purwantono purwantono Purwantono, Purwantono Putra, Alan Putra, Rahmat Mardiansyah Putra, Randi Purnama Putra, Rido Putra, Yopi Zekrri Jenizah Rahmad Robby Alzam Rahmadiawan, Dieter Ramadhan, Athaya Ramadhan, Qadri Refdinal Refdinal Refelino, Refelino Remon Lapisa Ressi Novia Windri Rifai Adlani, M. Rifaldo Novembli Rifelino Rifelino Rilgy Aulia Rozaki Yudha, Hatami Salwa Chairani Sanjaya, Gilang Santos, Thiago F. Saputra, Muhammad Pandi Satrianto, Habib Indra Shi, Shih-Chen Subakti, Muhammad Syahril Syahril Syaputra, Afzan Syauqi Arjunanda Tasyah Tasyah Teki Haryono Wahyu Ivan Pramana Wahyu Pratama Wahyudi Wahyudi Wanda Afnison Waskito Waskito Waskito Waskito Waskito, Waskito Wulansari, Rizky Ema yahril yahril Yandi Saputra Yolli Fernanda Yopi Zekri Jenizah Putra Yufrizal A Yufrizal Yufrizal, Yufrizal Zhuang, Wei-Ting