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All Journal Turbo : Jurnal Program Studi Teknik Mesin Jurnal Teknologi Terapan Infotekmesin Jurnal Pendidikan Teknik Mesin Undiksha Jurnal Vokasi Mekanika AMMA : Jurnal Pengabdian Masyarakat Majalah Teknik Mesin Jurnal Pendidikan Teknik Mesin J-Proteksion : Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin Journal of Industrial and Mechanical Engineering
Pujiyulianto, Eko
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Humanities Automotive Engineering Chemistry Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing

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Pengaruh Penggunaan Magnet Eksternal dan variasi arus Pada Pengelasan TIG Terhadap Struktur Mikro, Kekerasan dan Kekuatan Tarik Baja Karbon Rendah : The Effect of Using External Magnets and Current Variations in TIG Welding on the Microstructure, Hardness and Tensile Strength of Low Carbon Steel Paundra, Fajar; Rakha Yudanta, Faturrizky; muhyi, andul; Pujiyulianto, Eko; Budi Darsono, Febri
Jurnal Pendidikan Teknik Mesin Undiksha Vol. 13 No. 1 (2025)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jptm.v13i1.73571

Abstract

External magnetic fields can improve the quality of TIG welding results. This research aims to determine the effect of external magnetic fields in the TIG welding process. The material used in this research is SS400 steel. The welding process uses TIG (Tungsten Inert Gas) with varying currents of 70 A, 80 A, 90 A and 100 A and uses additional 2 Neodymium external magnets. Testing of welding results in the form of macro, micro structure, Vickers hardness test and tensile test. The macro structure test results show several welding defects such as porosity, incomplete penetration, underfill and distortion. Meanwhile, the results of microstructure testing show that the base metal contains ferrite and pearlite structures. The HAZ section contains ferrite, pearlite and martensite types of structures. The highest tensile test results were found in TIG welding connections without using a magnet with a current of 100 A, namely 368.234 MPa. The highest hardness test results were found in TIG welding joints using a magnet with a current of 100 A, namely 176,712 HVN. The use of external magnets can produce large penetration during the welding process and produce good welded joints. On the other hand, this can have a negative impact on the welding results if the distance between the electric arc and the material is not correct, and the torch does not move according to the welding path.
EVALUASI KINERJA GENERATOR AC SEDERHANA SECARA EKSPERIMEN BERDASARKAN VARIASI KECEPATAN PUTARAN DAN DIAMETER KAWAT Syaukani, Muhammad; Syah, Muhammad Aksel; Arirohman, Ilham Dwi; Afisna, Lathifa Putri; Pujiyulianto, Eko
Jurnal Teknologi Terapan Vol 11, No 1 (2025): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v11i1.786

Abstract

Small-scale renewable energy use is crucial for supplying the world's electrical needs. Utilizing these renewable energy sources requires a device that can transform mechanical power into electrical power. The purpose of this research is to construct a simple AC generator by converting mechanical power into electricity by varying the copper wire's diameter and rotational speed. The outcomes of the investigation include information on the electrical power, torque, mechanical power, and efficiency of the generator. The technical details of the generator employed are 12 poles, a rotor diameter of 9.25 cm, and a stator diameter of 9 cm. The results of the investigation reveal that the generator with the 0.15 mm variation in copper wire diameter performs better than the generators with the 0.75 mm variation in wire diameter. It can generate 80,6 watts of electric power, 1,231 N.m. of torque, 193,468 watts of mechanical force, and 41.66% of efficiency at a rotational speed of 1500 rpm. The result shows that the generator's performance will vary depending on the diameter of the wire at different rotating speeds.
THE EFFECT OF VARIATIONS IN PVC FOAM CORE THICKNESS ON THE FAILURE ANALYSIS OF BENDING TEST IN SANDWICH COMPOSITE Rodian, Afiko; Paundra, Fajar; Afisna, Lathifa Putri; Nurullah, Fajar Perdana; Pujiyulianto, Eko
Media Mesin: Majalah Teknik Mesin Vol. 26 No. 1 (2025)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v26i1.6108

Abstract

The composite sandwich core is one of the parts that act as an additional material. Despite the thinner core, it should produce a stiff, strong, and lightweight composite, and the higher the bending strength value obtained. This study aims to observe and analyze the influence of core thickness on bending strength and obtain elastic modulus as well as analyze the results of sandwich composite fracture after bending testing. The materials used are polyester resin, 240 gsm twill carbon fiber and core PVC foam. Variations in core thickness of 2 mm, 3 mm, 5 mm, 8 mm, and 10 mm. The method used is vacuum bagging. The tests carried out are bending tests using the ASTM C393 standard. The bending strength value of sandwich composite was obtained at a core thickness variation of 2 mm, which was 81.34 MPa, while the lowest bending strength value was found in a core thickness variation of 10 mm, which was 13.08 MPa.
ANALYSIS OF THE EFFECT OF NaOH PERCENTAGE ON THE TENSILE STRENGTH OF SISAL FIBER (AGAVE SISALANA) AND POLYURETHANE COMPOSITES USING THE COMPRESSION MOLDING METHOD paundra, fajar; Sidik, M. Farhan; Muhyi, Abdul; Nurullah, Fajar Perdana; Pujiyulianto, Eko; Syanur, Farid Nanda
Jurnal Pendidikan Teknik Mesin Vol. 24 No. 1 (2024): June 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/vbwm5m25

Abstract

The percentage of NaOH is one of the parameters that greatly affects the sisal fiber composite (Agave Sisalana). The purpose of this study was to observe and analyze the effect of the percentage of NaOH on the tensile strength of sisal fiber composites (Agave Sisalana). The materials used are sisal fiber (Agave Sisalana) and polyurethane resin at various percentages of NaOH, namely without treatment (0%), 4%, 7%, and 10% with soaking time for 2 hours and drying in the sun for a maximum of three days or until the fiber is completely dry. Composite manufacturing was carried out using the compression molding method for 24 hours at a pressure of 50 bar. The tests carried out in this study were tensile tests referring to the ASTM D 638 standard. The percentage of NaOH without treatment (0%) has the lowest maximum tensile value of 6.688 MPa, while the percentage of 7% NaOH has the highest maximum tensile strength value of 11.821 MPa. Then, the percentage of NaOH without treatment (0%) has the lowest maximum elastic modulus value of 0.072 GPa, and the highest maximum elastic modulus value of 0.152 GPa is also found at 7% NaOH percentage.
THE EFFECT OF VARIATIONS IN CURING TEMPERATURE OF CARBON FIBER/PVC FOAM BOARD SANDWICH COMPOSITES ON BENDING TEST FAILURE ANALYSIS paundra, fajar; Saputra, Rizky; Pujiyulianto, Eko; Arif, Muhamad Fatikul; Muhyi, Abdul
Jurnal Pendidikan Teknik Mesin Vol. 24 No. 1 (2024): June 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/xq8fy218

Abstract

Curing is a method to improve the ability of sandwich composite materials by heating the sandwich composite in an electric oven for a certain time and temperature. This research aims to observe and analyze the effect of curing temperature on bending strength and elastic modulus as well as analyzing the fracture results of sandwich composites. The materials used are polyester resin, 240 gsm twill carbon fiber and PVC foam core with a thickness of 5 mm. The manufacturing method used is vacuum bagging and the curing process is carried out with temperature variations of 70°C, 80°C and without curing for 1 hour. The test carried out is a bending test using the ASTM C393 standard. The maximum bending strength value of the sandwich composite is found at a curing temperature of 80°C, namely 48.35 MPa, while the lowest bending strength value is found in the variation without curing, namely 30.07 MPa. The highest elastic modulus value is also found at a curing temperature of 80°C, namely 67.03 GPa and the lowest elastic modulus value is also found in the variation without curing, namely 33.67 GPa.
EFFECT OF WELDING CURRENT ON LOW CARBON STEEL CHARACTERISTICS IN SMAW CLADDING PROCESS paundra, fajar; Yasmin, Dzikrina Salsabila; Pujiyulianto, Eko; Muhyi, Abdul; Rajagukguk, Kardo; Prabowo, Imam
Jurnal Pendidikan Teknik Mesin Vol. 25 No. 1 (2025): June 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jptm.v25i1.21279

Abstract

The electric current magnitude is a fundamental parameter that directly affects penetration characteristics and weld bead geometry. This study analyzes the effect of current variations on physical and mechanical properties in the cladding process using the Shielded Metal Arc Welding (SMAW) method. The materials used are low-carbon steel and HV-600 electrodes with a diameter of 3.2 mm. The SMAW method was applied with current variations of 100 A, 120 A, 140 A, and 160 A. The tests carried out were NDT liquid penetrant, macro structure, micro structure and Vickers hardness. The results indicate a positive correlation between increasing current and hardness values in the weld area, with the highest hardness recorded at 665.803 HVN at 160 A and the lowest at 515.143 HVN at 100 A. Meanwhile, in the Heat Affected Zone (HAZ), a non-linear pattern was observed, with a maximum hardness of 263.237 HVN at 120 A and a minimum of 219.110 HVN at 140 A. Microstructural analysis revealed the formation of ferrite, pearlite, bainite, and martensite phases in the weld area, providing insights into optimizing welding parameters to enhance the mechanical properties of low-carbon steel cladding.
Edukasi Laboratorium Teknik Mesin ITERA Bagi Siswa SMKN 1 Raman Utara Dalam Meningkatkan Literasi Teknologi Paundra, Fajar; Muhyi, Abdul; Perdana Nurullah, Fajar; Pujiyulianto, Eko; Gahana Cindi Alfian, Devia; Syaukani, Muhammad; Rajagukguk, Kardo; Januarizky Silitonga, Dicky; Andi Kolala, Putra; Nanda Syanur, Farid; Aditia Prahmana, Rico
AMMA : Jurnal Pengabdian Masyarakat Vol. 4 No. 5 : Juni (2025): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This community service activity aims to introduce the laboratory environment and facilities of the Mechanical Engineering Study Program at Institut Teknologi Sumatera (ITERA) to students of SMKN 1 Raman Utara, East Lampung. The activity was conducted in the form of a campus visit involving 62 12th-grade students from the Light Vehicle Engineering Department. The agenda included a presentation on higher education opportunities, interactive discussions, a Q&A session, and a direct tour of ITERA’s Mechanical Engineering laboratories, including the Materials Engineering, Energy Conversion, Fabrication, Manufacturing, Internal Combustion Engines, and Foundry laboratories. This activity was designed to inspire students to pursue higher education and broaden their understanding of engineering fields. The outcome showed a high level of enthusiasm among the students and successfully achieved the goal of introducing campus life and technological exposure. This initiative is expected to serve as an initial step in strengthening synergy between vocational high schools and higher education institutions.
Analisis Pengaruh Temperatur Terhadap Kekuatan Tarik dan Tekuk pada Proses Hot Pressing Komposit Hybrid Serat Bambu dan Serat Daun Nanas Bermatriks HDPE Paundra, Fajar; Pratama, Angga Jihan; Pujiyulianto, Eko; Muhyi, Abdul; Yudistira, Hadi Teguh; Maulana, Sena; Elmiawan, Puguh
J-Proteksion: Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin Vol. 8 No. 2 (2024): J-Proteksion
Publisher : Universitas Muhammadiyah Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32528/jp.v8i2.1123

Abstract

Temperatur merupakan salah satu parameter yang sangat berpengaruh terhadap komposit HDPE. Penelitian ini bertujuan mengamati dan menganalisis pengaruh temperatur terhadap kekuatan tarik dan tekuk pada proses hot pressing komposit hybrid serat bambu dan serat daun nanas bermatriks HDPE. Material yang digunakan yaitu plastik HDPE, serat bambu dan serat daun nanas. Proses pembuatan dengan metode hot pressing bertekanan 25 bar dengan variasi temperatur 170°C, 180°C, 190°C, 200°C, dan 210°C selama holding time 25 menit. Pengujian yang dilakukan pada penelitian ini adalah pengujian tarik dan pengujian tekuk yang merujuk pada standar ASTM D 3039 dan ASTM D 790. Nilai kekuatan tarik maksimal komposit HDPE tertinggi terdapat pada temperatur 170°C dengan nilai sebesar 514,489 MPa dan nilai kekuatan tarik maksimal terendah terdapat pada temperatur 210°C dengan nilai sebesar 383,349 MPa. Nilai kekuatan tekuk maksimal tertinggi juga terdapat pada temperatur 170°C dengan nilai sebesar 97,322 MPa dan nilai kekuatan tekuk terendah terdapat pada temperatur 210°C dengan nilai sebesar 74,081 MPa.
Effect of Hot Compression Molding Temperature Variation on Coconut Fiber HDPE Hybrid Composite and Sansevieria Trifasciata on Physical and Mechanical Properties Sidik, Muhammad Farhan; Paundra, Fajar; Galih, Rene Hario; Muhyi, Abdul; Pujiyulianto, Eko; Syanur, Farid Nanda; Setyawati, Annisa Indah
Journal of Industrial and Mechanical Engineering Vol 2 No 1 (2024): Journal of Industrial and Mechanical Engineering
Publisher : Department of Industrial Engineering, Universitas Jenderal Soedirman.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jimien.2024.2.1.11826

Abstract

Temperature is one of the parameters that is very influential in the process of making HDPE matrix composites. This study aims to determine the effect of variations in heating temperature on tensile strength and bending strength and to analyze the fracture structure of HDPE composites. The materials used in this study were HDPE plastic from used bottles, coconut fiber and Sansevieria fiber with a composite ratio of 90:5:5. The process of making HDPE composites is carried out using the hot press compression method. The pressure used is 30 bar for 30 minutes. The temperature variations used are 150ºC, 160ºC, 170ºC, 180ºC, and 190ºC. This study conducted two tests, namely tensile testing and bending testing using the Universal Testing Machine. The tensile testing process uses the ASTM D 3039 standard and obtains the highest results on specimens of 170ºC with a tensile strength value of 509.80 MPa. The value of tensile strength has increased and decreased. The bending test process was carried out according to the ASTM D 790 standard and the highest results were obtained on the 170ºC specimen with a value of 90.99 MPa.
The Effect of Welding Speed on the Physical and Mechanical Properties of Low Carbon Steel Welded Joints Using TIG Welding Using 2 External Magnetic Fields Paundra, Fajar; Prabowo, Andi; Sidik, M Farhan; Muhyi, Abdul; Pujiyulianto, Eko; Syanur, Farid Nanda; Permata, Ariyo Nurachman Satiya
Journal of Industrial and Mechanical Engineering Vol 2 No 1 (2024): Journal of Industrial and Mechanical Engineering
Publisher : Department of Industrial Engineering, Universitas Jenderal Soedirman.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jimien.2024.2.1.11873

Abstract

The use of external magnetic fields is very influential in TIG (Tungsten Inert Gas) welding because it can disrupt the stability of the electric arc formed between the tungsten electrode and the base metal. Magnetic fields can cause the arc to distort or shift, resulting in uneven and low quality welds. TIG (Tungsten Inert Gas) is a welding method that uses a non-melting tungsten electrode to produce a weld. This study aims to determine the effect of external magnetic field on the quality of TIG welding results. This research uses the TIG (Tungsten Inert Gas) welding process on low carbon steel material with speed variations of 4 mm/s, 6 mm/s, 8 mm/s and 10 mm/s and uses 2 Neodymium type external magnetic fields. Tests carried out on the results of welding joints are Vickers hardness test, micro & macro structure test. The highest hardness test value was obtained in the 4 mm/s welding speed variation using 2 external magnetic fields with a hardness value of 187.388 HVN. Microstructure testing shows that the base metal contains ferrite and pearlite structures. In the HAZ (Heat Affected Zone) area there are ferrite, pearlite and martensite structures. Macro structure testing shows several welding defects, including porosity, imperfect penetration, underfill and irregular surface. The use of two external magnetic fields can affect the results of TIG welding itself, such as deepening the penetration of welding so as to produce a good welding joint. Some things you should pay attention to if you don't want welding defects to occur are paying attention to the distance between the electric arc and the material, and the torch must be parallel to the welding line.
Co-Authors Abdul, Abdul Aditia Prahmana, Rico Aldyansyah, Dimas Andi Kolala, Putra Arif, Muhamad F. Arirohman, Ilham Dwi Budi Darsono, Febri Dicky J. Silitonga Elmiawan, Puguh Firdaus, M. Adrian Gahana Cindi Alfian, Devia galih, Rene hario Hadi Teguh Yudistira, Hadi Teguh Imam Prabowo, Imam Irza Sukmana, Irza Kardo Rajagukguk, Kardo Lathifa Putri Afisna Mahesa, Iqbal Manzeis, Ilhan Maulana, Sena Muhamad Fatikul Arif Muhammad Syaukani Muhyi, A. Muhyi, Abdul muhyi, andul Munte, Daniel C. Nanda Syanur, Farid Nurullah, Fajar Perdana Paundra, F. Paundra, Fajar Perdana Nurullah, Fajar Permata, Ariyo Nurachman Satiya Prabowo, Andi Pratama, Angga Jihan Rakha Yudanta, Faturrizky Ramadhan Siregar, Ilham Ramadhanty, Nabila Rivaldo Aritonang, Joy Rizky Saputra, Rizky Rodian, Afiko Setyawati, Annisa Indah Sidik, M Farhan Sidik, M. Farhan Sidik, Muhammad Farhan Sri Bagaskara, Firman Suharno Suharno Syah, Muhammad Aksel SYANUR, FARID NANDA Wibawa, Gilang Putra Yasmin, Dzikrina Salsabila