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All Journal MERDEKA: Jurnal Ilmiah Multidisiplin Jurnal Polimesin Nozel : Jurnal Pendididikan Teknik Mesin
Yahya, Muhammad Yusri Dzal
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Automotive Engineering Control & Systems Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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PERANCANGAN LAYOUT TRIAL ENGINEER ROOM MENGGUNAKAN SOLIDWORKS DI PT ARAI RUBBER SEAL INDONESIA Yusuf, Arya; Yahya, Muhammad Yusri Dzal
MERDEKA : Jurnal Ilmiah Multidisiplin Vol. 2 No. 1 (2024): Oktober
Publisher : PT PUBLIKASI INSPIRASI INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62017/merdeka.v2i1.2080

Abstract

Program Magang dan Studi Independen Bersertifikat (MSIB) merupakan program persiapan karier yang komprehensif dan memberikan kesempatan bagi mahasiswa untuk belajar di baik sesuai atau diluar program studi. MSIB adalah salah satu program yang diseleggarakan oleh Kementerian Riset, Teknologi, Pendidikan Tinggi (Kemenristekdikti) melalui Merdeka Belajar Kampus Merdeka (MBKM). Program ini memiliki tujuan untuk meningkatkan kompetensi mahasiswa Indonesia melalui kemampuan dan pengetahuan kuat di bidang Industri. Pada kegiatan ini, Kampus Merdeka bermitra dengan berbagai perusahaan di seluruh Indonesia dengan kesempatan bagi mahasiswa untuk mendaftarnya terbuka sangat lebar. Salah satunya dengan bermitra bersama PT. Arai Rubber Seal Indonesia (ARSI). Lingkup pekerjaan dalam program Magang MSIB pada Departemen Research and Development yakni mahasiswa diberikan penugasan berupa studi kasus atau proyek yang menunjang kebutuhan perusahaan. Proyek tersebut lebih rinci yaitu perancangan layout ruangan produksi. Pada artikel yang dibuat penulis, dapat disimpulkan bahwa pengembangan tata letak ruang produksi ini dapat memberikan kontribusi positif terhadap efektivitas produksi perusahaan.
Numerical and experimental investigation of scaling laws in PLA octet-truss lattice structures under compression load Yahya, Muhammad Yusri Dzal; Pramono, Agus Sigit
Jurnal Polimesin Vol 23, No 6 (2025): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i6.8353

Abstract

The demand for lightweight materials with superior strength-to-weight ratios in modern industry has driven innovation in architectural materials. Lattice structures, enabled by advances in Additive Manufacturing (AM), present a promising solution. However, their mechanical performance often deviates from theoretical predictions due to the complexity of the fabrication process, particularly in Fused Deposition Modeling (FDM) technology, which is prone to process defects and size effects. This study aims to address the discrepancy between scaling-law predictions and the actual mechanical response of an Octet-Truss lattice structure fabricated from Polylactic Acid (PLA) using FDM. This study specifically investigates the effects of geometric scaling up/down (0.75x, 1x, and, 1.25x) and the number of periodic unit cells (1 - 8) on compressive response up to the yield limit. To validate the compression behavior, this study combined Finite Element Analysis (FEA) with experimental compression testing of FDM-fabricated PLA specimens. A highly accurate linear regression model (R² 99.7%) was formulated, relating maximum compression force (Fmax) to the number of unitcells (ncell), with FEA predictions aligning with experimental results within a 1.70% error margin. This empirical scaling law facilitates accurate predictions of load-bearing capacity across a range of lattice configurations (with cell sizes ranging from 15 to 25 mm cell sizes ) and load predictions ranging from 312 to 2,847 N for all tested configurations. This contributes to the development of a practical and reliable predictive design tool for lightweight structural engineering applications.
EFEKTIVITAS TUTOR TEMAN SEBAYA DALAM PENCAPAIAN PEMAHAMAN SISWA PADA MATA PELAJARAN GAMBAR TEKNIK MANUFAKTUR Yahya, Muhammad Yusri Dzal; Shaddiq, Syahrial; Yusuf, Arya; Wulida, Siti Nursipa
Nozel : Jurnal Pendididikan Teknik Mesin Vol 7, No 2 (2025)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v7i2.93028

Abstract

Individual differences in understanding are crucial in education, requiring teachers to tailor learning activities to meet students' needs. This study conducted as a quasi-experiment, involved 72 students from two classes (XI TM A and XI TM B) at SMK Negeri 1 Magelang during the 2023/2024 academic year. The research utilized a post-test only control group design to assess the effectiveness of peer tutoring. The experimental group had an average score of 96.90, while the control group averaged 94.29. The experimental group's scores ranged from 90.5 to 100 and the control group's scores ranged from 77.5 to 97. Statistical analysis using levene's test showed homogeneous data (Pvalue = 0.189 > α = 0.05). The t-test indicated a significant effect of peer tutoring on students' understanding of technical drawing (Tcount = 4.003 > Ttable = 2.000). The study concluded that peer tutoring significantly improves student performance in the manufacturing engineering drawing subject, recommending further research on its effectiveness in other subjects and educational levels.
Co-Authors Agus Sigit Pramono Syahrial Shaddiq Wulida, Siti Nursipa Yusuf, Arya