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All Journal LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Jurnal Teknik Mesin International Journal of Industrial Innovation and Mechanical Engineering
Adri Fato
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Astronomy Automotive Engineering Computer Science & IT Energy Engineering Materials Science & Nanotechnology Mechanical Engineering

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Rancang Bangun Dan Validasi Alat Uji Kekerasan Brinell Sederhana Menggunakan Dongkrak Botol Nurul Jamalulail; Ari Supriyanto; wisnu fajar pratama; Adri Fato
LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Vol 12 No 02 (2025): Oktober 2025
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/ljtmu.v12i02.24393

Abstract

Penelitian ini membahas perancangan, pembuatan, dan validasi alat uji kekerasan Brinell sederhana dengan menggunakan dongkrak botol hidrolik sebagai beban utama. Tujuan penelitian ini adalah menghasilkan alat uji yang lebih ekonomis, mudah dibuat, dan praktis untuk keperluan pendidikan dan praktik di Universitas Dian Nusantara. Proses penelitian meliputi perancangan menggunakan perangkat lunak Autodesk Inventor 2021, pembuatan komponen utama, dan validasi alat. Material utama yang digunakan untuk rangka antara lain baja UNP, IWF, pelat baja A36, dan baja S45C. Hasil validasi menunjukkan bahwa rangka mampu menahan beban hingga 3000 kgf tanpa mengalami deformasi yang berarti dengan toleransi yang dapat diterima. Pengujian menggunakan material aluminium 5052 menghasilkan indentasi yang konsisten sebesar 7,1 mm, sesuai dengan standar kekerasan 60-65 HB. Hasil penelitian ini menunjukkan bahwa alat yang dirancang memiliki akurasi yang cukup untuk digunakan sebagai alat pembelajaran dan praktik.
Analisis Kekuatan Sambungan Las Butt joint pada Struktur Logam Baja A36 Menggunakan Simulasi SolidWorks Septiadi Lukmawan; Adri Fato
Jurnal Teknik Mesin Vol. 18 No. 2 (2025): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.18.2.1957

Abstract

This research evaluates the mechanical strength of butt joint welds on ASTM A36 steel by comparing outcomes from laboratory testing and numerical simulations using SolidWorks. Physical experiments consisted of tensile and bending tests, while the simulation utilized the Finite Element Method (FEM). The tensile test produced an ultimate tensile strength of 498.4 MPa and a yield strength of 361.4 MPa, whereas the simulation yielded 475 MPa and 250 MPa, respectively. The bending test results indicated that the welded specimens exhibited good ductility without visible surface flaws. Differences between simulation and experimental data were mainly due to the idealized material properties in the software compared to the variability found in real specimens. These findings suggest that SolidWorks-based FEM simulation can serve as an effective preliminary tool for predicting weld joint performance, but physical testing remains necessary to validate and ensure reliability.
Analysis of The Effect of Variations in Smaw Welding Current on Indications of Surface Defects Using The Penetrant Test (PT) and Magnetic Particle Test (MT) on ASTM A106 GR. B Pipes Based on Asme B31.3 Acceptance Criteria Ugih Sugiarto; Adri Fato
International Journal of Industrial Innovation and Mechanical Engineering Vol. 3 No. 3 (2026): August: International Journal of Industrial Innovation and Mechanical Engineeri
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/ijiime.v3i3.448

Abstract

Shielded Metal Arc Welding (SMAW) is one of the most widely used metal joining processes in the piping industry because it is capable of producing weld joints with good quality and mechanical strength. One of the welding parameters that significantly affects weld quality is the welding current. An inappropriate current setting may increase the occurrence of surface discontinuities, which can reduce the quality of the welded joint. This study aimed to analyze the effect of SMAW welding current variations on surface discontinuity indications in ASTM A106 Grade B pipe using the Penetrant Test (PT) and Magnetic Particle Test (MT) methods based on the Acceptance Criteria of ASME B31.3. The research was conducted using an experimental method on ASTM A106 Grade B pipe welded with an E7018 electrode of 3.2 mm diameter in the 1G welding position. The welding current variations applied were 46 A, 65 A, 88 A, 115 A, 160 A, and 210 A. Each specimen was initially examined through Visual Inspection, followed by Penetrant Test (PT) and Magnetic Particle Test (MT) to identify surface discontinuity indications. The inspection results were subsequently evaluated according to the Acceptance Criteria of ASME B31.3. The results showed that variations in welding current affected the surface quality of the welded joints. At welding currents of 46 A and 65 A, porosity and incomplete fill indications were still observed, while undercut indications were identified at 160 A and 210 A. In contrast, the specimens welded at 88 A and 115 A showed no discontinuity indications exceeding the acceptance limits and were therefore classified as acceptable. Based on the evaluation in accordance with the Acceptance Criteria of ASME B31.3, it can be concluded that the welding current range of 88 A to 115 A produced the best weld surface quality under the conditions of this study.
Co-Authors ari supriyanto Nurul Jamalulail Septiadi Lukmawan Ugih Sugiarto wisnu fajar pratama