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All Journal Jurnal Penelitian dan Pengembangan Pendidikan Jurnal Pendidikan Teknologi dan Kejuruan Penelitian Pendidikan INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Penelitian Pendidikan IPA (JPPIPA) Martabe : Jurnal Pengabdian Kepada Masyarakat JURNAL PENDIDIKAN TAMBUSAI Jurnal Ilmiah Pendidikan dan Pembelajaran Journal of Educational Research and Evaluation Mimbar Ilmu Jurnal Ilmiah Pendidikan Profesi Guru International Journal of Educational Dynamics (IJEDS) JETL (Journal Of Education, Teaching and Learning) EDUTEC : Journal of Education And Technology MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Jurnal Abdidas Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Teknomekanik ARSY : Jurnal Aplikasi Riset kepada Masyarakat Indonesian Gender and Society Journal Jurnal Vokasi Mekanika YASIN: Jurnal Pendidikan dan Sosial Budaya MASALIQ: Jurnal Pendidikan dan Sains CONSEN: Indonesian Journal of Community Services and Engagement Jurnal Teknik Mesin, Industri, Elektro dan Informatika Journal of Engineering Researcher and Lecturer Indonesian Journal of Innovation Science and Knowledge Venus: Jurnal Publikasi Rumpun Ilmu Teknik Journal of Golden Generation Education
Eko Indrawan
Universitas Negeri Padang
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Journal : Teknomekanik

 1 
Optimization of CNC Turning Parameters Using Taguchi Method Rifelino, Rifelino; Rahim, Bulkia; Indrawan, Eko
Teknomekanik Vol. 4 No. 1 (2021): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (272.356 KB) | DOI: 10.24036/teknomekanik.v4i1.11072

Abstract

The surface roughness quality of machining product plays important role when it contacted with other machine components. That quality depends on several parameters setting, such as material, cutting tool, cutting condition and operator skill. The aim of this study is to obtain the optimum setting of turning parameters by using Taguchi method. Three control factors: cutting speed, depth of cut, and feeding at three different levels are selected. A series CNC turning process on AISI 1045 material were performed using L9 (3)3 orthogonal array with cutting fluid. Insert carbide cutting tool is used in the experiment. In order to reveal the optimum machining parameter, smaller the better is quality characteristic selected for surface roughness examination of workpiece. Analysis of experiment results revealed that higher cutting speed, low feed, low depth of cut respectively, provides fine surface quality of machined workpiece. Moreover, feed f parameter was found most influence to the surface rougness quality with 53.73% contribution, cutting speed v provides 23.28% contribution, and depth of cut a provides 17.87% contribution. Confirmation experiment shows that level 3 of cutting speed, level 2 of cutting depth, and level 1 of feed deliver smoothest machined surface of Ra 0,46 µm.
Enhanced durability and tribological performance of polyvinyl alcohol/layered double hydroxide/tannic acid composites under repeated swelling cycles Rahmadiawan, Dieter; Shi, Shih-Chen; Zhuang, Wei-Ting; Indrawan, Eko; Fernanda, Yolli; Syahri, Budi; Irzal, Irzal
Teknomekanik Vol. 7 No. 2 (2024): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v7i2.32872

Abstract

In recent years, the exploration of polyvinyl alcohol (PVA) composites has garnered significant attention due to their versatility applications in aqueous environments. However, despite their promise, neat PVA exhibit limitations such as significant mechanical degradation under repeated swelling cycles. This study investigates the durability and tribological performance of polyvinyl alcohol (PVA) composites reinforced with nickel-iron layered double hydroxide (LDH) and tannic acid (TA) under repeated swelling cycles. Building on previous research that explored composite preparation and initial characterization, this research emphasizes the effects of cyclic swelling on wear resistance, friction behavior, and mechanical properties. Tribological tests were conducted to evaluate the coefficient of friction (COF) and wear rate before and after multiple swelling cycles, alongside tensile strength and strain measurements. The results revealed that the PVA/TA2/LDH2 composite, containing the highest additive content, exhibited the lowest wear rate of 11.52 × 10⁻⁵ mm³/Nm after 3 swelling cycles, demonstrating superior resistance to material degradation. Although PVA/TA2/LDH1 exhibited a slightly lower COF, its wear rate was higher due to reduced reinforcement. Compared to neat PVA, which showed a COF increase from 0.45 to 0.53, the PVA/LDH/TA composites retained their tribological stability, with only a marginal increase in COF and wear rate. Similarly, tensile strength of PVA/TA2/LDH2 decreased by only 11% after 3 cycles (from 33.3 MPa to 30 MPa), while neat PVA experienced a 25.5% reduction (from 30 MPa to 22.5 MPa). These findings highlight the potential of PVA/LDH/TA composites for applications in aqueous environments, offering significantly enhanced long-term performance and reliability.
Trends in anti-UV films or composites: A bibliometric study Rahmadiawan, Dieter; Santos, Thiago F.; Aslfattahi, Navid; Shi, Shih-Chen; Indrawan, Eko; Ramadhan, Athaya; Abadi, Zainal
Teknomekanik Vol. 8 No. 2 (2025): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v8i2.44072

Abstract

Anti-UV films and composites play a critical role in protecting materials from ultraviolet-induced degradation, which can weaken polymers, reduce product lifespan, and compromise performance in sectors such as food packaging, outdoor coatings, and biomedical devices. The growing emphasis on sustainability and the need for environmentally friendly protective materials have further accelerated research on UV-shielding technologies that incorporate biopolymers, multifunctional additives, and renewable resources. This study presents a comprehensive bibliometric analysis of global research on anti-UV films and composites over the period 2014–2024. Data were retrieved from the Scopus database and analyzed using Bibliometrix (R package) and VOSviewer were employed to analyze publication patterns, map keyword networks, and visualize thematic evolution, as these tools enable robust quantitative and structural mapping of large bibliographic datasets. Three dominant thematic clusters were identified: (i) nanoparticle-based UV shielding using inorganic fillers such as ZnO and TiO₂, (ii) multifunctional films integrating UV protection with antibacterial and antioxidant properties, and (iii) biopolymer-based matrices emphasizing mechanical durability and environmental sustainability. These clusters highlight the convergence of performance, sustainability, and multifunctionality as key drivers shaping current research directions. Despite significant progress, the analysis reveals limited attention to scalability, industrial compatibility, and long-term performance evaluation. The findings underscore the need for future research to incorporate pilot-scale processing, life-cycle assessments, and interdisciplinary collaboration to bridge the gap between laboratory formulations and commercial implementation. Overall, this bibliometric study provides a consolidated understanding of the evolution and research landscape of anti-UV films and composites.
Co-Authors - Primawati A.A. Ketut Agung Cahyawan W Abd Aziz Abdul Aziz Abdul Aziz Afriwandi Agung Agung Ahmad Firdaus Ahzaliza, Dian Alexsandra, Alexsandra Andre Kurniawan Andre Kurniawan Anggi Anggi Aprilla Fortuna Arafat, Andril Arwizet Arwizet, Arwizet Aslfattahi, Navid Bayu Fornandes Budi Syahri Bulkia Rahim Cici Andriani Daffa Raihan Senthot Dedy Irfan Defra Yones Delima Yanti Sari Dimas Aulia Saputra Dino Ardianto Dony Novaliendry Dori Yuvenda Eko Kurnia Saputra Elfi Tasrif Enggian Lubis Ericka Putra Evandel, Kervan Fauzan . Fauzan Fauzan Febri Prasetya Febrian, Muhammad Ivan Fenandes, Yose Fiki Efendi Fikri, Ikhsanul Firdaus, Afzanul Firmanto, Aldi Fitra Adhitya Fuadi, Muhammad Azis Galib Afdi, Alham Giatman, M Gifan Ainul Mukhrim Hafifurrezy, M. Hasan Maksum Hendri Nurdin Hendriani, Rita Hendriani Husnul Fiqri Ibnu Abid Al Rasyid Ikhsan Dani Nugraha Ilham Ilham Ilham Rinaldo Putra Indra Mandala Putra Irzal, Irzal Islamimahdi Islamimahdi Jasman Jasman Jasman Jasman Jasman Jasman Jhoni Andrianto Junil Adri Juri, Arfin Kassymova, Gulzhaina Kuralbayevna Khairul Andrivo Koto, Rahmat Desman Laksono Trisnantoro Makobul Pasaribu Mardi, Feldia Mayuliardi, Mayuliardi Muhammad Elfin Muhammad Iqbal Tawakal Muhammad Iqbal Tawakal Mulianti Mulya Melda Mulyanto Mulyanto Muzaki, Saepul Nabawi, Rahmat Azis Nabila Tasrif Nelvi Erizon Nofri Helmi Nofri Helmi Novajri, Kardimen Nur Ichsan Abdillah Nurdin Hendri Pratama, Raymon Pratama, Yuhanda Dicky Primawati , Primawati Primawati Primawati Primawati Primawati, Primawati Purwanto, Wawan Purwantono Purwantono Purwantono purwantono purwantono Putra, Alan Putra, Robby Eliga Putra, Setrihan Putra, Syafriade Rahmadiawan, Dieter Rahmadona, Tiwi Rahman Febrio Rahman Hasyim Rahmat Hidayat Raihan Ramadhan Rajul Halim Perdana Ismet Ramadhan, Athaya Randi Purnama Putra Ratna Yulia Refdinal Refdinal Refelino, Refelino Remon Lapisa Rifdarmon, Rifdarmon Rifelino Rifelino Rizky Ema Wulansari Rizky Ema Wulansari Rodesri Mulyadi Santos, Thiago F. Savitri, Wici Aan Septiawan, Dwi Ari Setia, Putri Bunga Shi, Shih-Chen Steven Thomas Anggriyanto Syahril Syahril Tasrif , Nabila Tiwi Rahmadona Venny Ventriolla Vikri Resvi Pratama Wagino Wakhinuddin Wakhinuddin, Wakhinuddin Wanda Afnison Wulansari, Rizky Ema Yoga Amanda Putra Yoga Volanda Saputra Yoga Zulnanda Yolli Fernanda Yose Fenandes Yufrizal A Yufrizal Yufrizal Yufrizal Yufrizal Yufrizal Yufrizal, Yufrizal Zainal Abadi Zhuang, Wei-Ting