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All Journal Rekayasa Mesin Jurnal Rekayasa Mesin JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY KACANEGARA Jurnal Pengabdian pada Masyarakat Piston: Journal of Technical Engineering STEAM Engineering : Journal of Science, Technology, Education And Mechanical Engineering Jurnal Pendidikan dan Teknologi Indonesia Jurnal Ilmiah Wahana Pendidikan Society: Jurnal Pengabdian Masyarakat Sinergi Polmed : Jurnal Ilmiah Teknik Mesin Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan
Darsono, Febri Budi
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Characteristics of SKD 61 and Aluminium 7075 Tools in High Density Polyethylene (HDPE) and Polypropylene (PP) Welding in Terms of Tensile Strength and Bending strength Alkafi, Abu Faqih; Darsono, Febri Budi; Kriswanto; Rochim, Mohammad Nur
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 9 No. 2 (2025): December 2025 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v9i2.15550

Abstract

Effective welding procedures are necessary to preserve structural integrity due to the growing usage of lightweight polymers in industry, such as polypropylene (PP) and high density polyethylene (HDPE). This study sought to determine how the tool materials, SKD 61 and Aluminum 7075, affected the tensile and bending strength of HDPE and PP friction stir welded (FSW) joints. A quantitative comparative design was used in the experiment, and the FSW tool was modified milling equipment with screw cylindrical pin tools. Temperature control was observed using a thermogun and no preheating was used to guarantee process stability. Based on the results, SKD 61 generated higher weld quality, which was characterized by fewer flaws, regulated heat input, and more consistent material flow. SKD 61 outperformed than aluminium 7075, which had an average tensile strength of 11.09 MPa and bending strength of 19.11 MPa, while aluminium 7075 had an average tensile strength of 7.8 MPa and bending strengths of 16.28 MPa. This discrepancy is explained by SKD 61's higher heat conductivity and stability, whereas tool geometry had little effect because the screw cylindrical pin profile was the same. SKD 61 is more suited for FSW of HDPE-PP dissimilar joints, according to the study's findings, offering higher joint quality and stronger mechanical performance.
Characteristics of Tool Tilt Variation in Friction Stir Welding HDPE with Tool Made of 7075 Aluminum on Tensile and Bending Strengths Nur Rochim, Mohammad; Darsono, Febri Budi; Kriswanto; Alkafi, Abu Faqih
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 9 No. 2 (2025): December 2025 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v9i2.15551

Abstract

High-Density Polyethylene's (HDPE) potential is highlighted by the growing need for lightweight, high-strength materials in the automotive and aerospace industries. Friction Stir Welding (FSW) provides a solid-state joining method with low thermal degradation for producing high-quality joints in this thermoplastic material. With an emphasis on tensile and bending strength, this study attempts to examine how tool tilt angle variation affects HDPE joint quality. Three different tilt angle variations—0°, 1°, and 1.5°—were used in the experiment, which was carried out using an aluminum 7075 tool that was shaped like a grooved conical pin. A modified milling machine was used for welding, and ASTM D638 for tensile and ASTM D790 for bending mechanical tests were conducted. The findings show that the tilt angle has a major impact on the quality of the weld. With a tensile strength of 13 MPa (68.4% of raw HDPE), a bending strength of 16.5 MPa (70.5%), and a dense stir zone with few voids, the best weld was produced at a 1.5° angle. On the other hand, the weakest joint with obvious structural flaws was produced by the 0° angle. Overall, it is determined that the best tilt angle for improving the mechanical and aesthetic performance of FSW joints in HDPE is 1.5°.
Strengthening 3D Model Design Learning by Utilizing Website-Based Onshape 3D to Improve the Competence of Students at SMKN Jateng in Semarang Bahatmaka, Aldias; Darsono, Febri Budi; Irawaty; Prasdika, Tegar Oki; Laksono, Aryo; Habibullah, Muhammad; Muclisin, Choirul Anton
Society : Jurnal Pengabdian Masyarakat Vol. 5 No. 1 (2026): Januari
Publisher : Edumedia Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55824/fm0xbg40

Abstract

This community service is an implementation of science in the field of Design / Engineering, especially 3D object design. The Indonesian creative industry sees great opportunities with 3D design. This is closely related to the development of information technology that is increasing every year. Knowing how to create 3D objects will open up job opportunities for the current generation. In addition, it is also one way to attract scientific interests to the University level, especially in the Mechanical Engineering Department. In facing increasingly fierce global competition, it is very necessary The purpose of this community service program is to provide training in creating 3D objects to vocational school students because there is no comprehensive training on the process of creating 3D objects and their supporting tools. as an effort to improve design skills and also at the same time capture students' interests and talents to be able to learn early about one of the sciences in the Mechanical Engineering Department. 3D object design begins with how to create 3D objects with website-based Onshape3d. Onshape3d with a website was chosen because it is open source or free. Onshape3d's ability to create 3D objects and create 3D animations has long been recognized, because it is open source. To prevent creativity support from becoming a burden, it is hoped that this will become a source of innovation for participants. To assess the effectiveness of the training, student understanding was evaluated through Quizizz before the pre-test and after the post-test of the activity. The pre-test results showed that students' initial understanding of 3D design concepts and CAD software was still relatively low, with an average score of 45%. Their knowledge was still limited to the basic functions of modeling software. After the training, the post-test evaluation showed a significant improvement: the average score jumped to 76%, reflecting a better understanding of 3D design concepts and skills in using OnShape 3D.
Co-Authors Ahda, Zahrah Zakiya Aldias Bahatmaka Alkafi, Abu Faqih Buana, Lanang Puspa Eko Pujiyulianto Fahmi, Fiqri Fadillah Fitriana, Deni Fajar Fitriyana, Deni Fajar Ghyferi, Andi Abdullah Harsandi, Zaidan Priya Hidayat, Hanif Hidayat, Indra Nurul Irawaty Iskandar, Ranu Khoirul Huda Kriswanto Kriswanto Kriswanto, Kriswanto Laksono, Aryo Malisi, Muhammad Sibro Masruhan, Fahmi Irsad Muclisin, Choirul Anton Muhammad Habibullah Muhyi, Abdul Nur Rochim, Mohammad Nurdin, Akhmad Nuryanta, Muhammad Irfan Paundra, Fajar Prasdika, Tegar Oki Ramadhani, Risky Ridwan Afandi Rochim, Mohammad Nur Rochim, Muhammad Nur Rusiyanto Rusiyanto, Rusiyanto Sri Hastuti Sutanto, Herry SYANUR, FARID NANDA Wibowo, Muhammad Yusuf Yudanta, Faturrizky Rakha