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All Journal Jurnal Teknik Mesin Rotasi Jurnal Teknologi Jurnal Mechanical Media Mesin: Majalah Teknik Mesin VANOS Journal of Mechanical Engineering Education Journal of Science and Applicative Technology Metal Indonesia JURNAL CRANKSHAFT Infotekmesin STEAM Engineering : Journal of Science, Technology, Education And Mechanical Engineering J-Proteksion: Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin Journal of Metallurgical Engineering and Processing Technology Journal of Mechanical Engineering Journal of Applied Mechanical Technology (JAMET) Jurnal Foundry Journal of Sciencce Technology and Visual Culture
Fajar Paundra
Institut Teknologi Sumatera
Aerospace Engineering Arts Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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THE EFFECT OF WEBBING ANGLE ORIENTATION ON PHYSICAL AND MECHANICAL PROPERTIES OF BOEHMERIA NIVEA FIBER COMPOSITES Fajar Perdana Nurrullah; Fajar Paundra; Anas Maulana; Abdul Muhyi; Akhmad Nurdin; Indriyani Indriyani
Media Mesin: Majalah Teknik Mesin Vol 24, No 1 (2023)
Publisher : Program Studi Teknik Mesin, Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v24i1.18406

Abstract

Composites are a combination of two or more different materials with different mechanical properties. The purpose of this research was to determine the effect of the angle orientation of the Boehmeria Nivea fiber-reinforced composite woven on the physical and mechanical properties. Boehmeria Nivea fiber is soaked in an alkaline solution and made into ropes with a diameter of 2-3 mm and then woven with angle orientations of 0o/15o, 0o/30o, 0o/45o and 0o/90o. The composite manufacturing process uses the press molding method. The tests in this study consisted of a tensile test with the ASTM D3039 standard, a flexural test with the ISO 178 standard and a density test with the ASTM C271 standard. Tensile test results show that the highest tensile strength occurs at 0°/15° webbing angle orientation, which is 13.77 Mpa. While the highest bending test results occur at the orientation of the 0°/15° webbing angle, which is 60.52 MPa. Tensile and flexural strength increases with smaller webbing angle orientation.
Perancangan Bidai Infus Untuk Anak Usia Sekolah Putty Yunesti; Andi Rahadiyan Wijaya; I Gusti Bagus Budi Dharma; Fajar Paundra
Journal of Science and Applicative Technology Vol 5 No 2 (2021): Journal of Science and Applicative Technology December Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v5i2.451

Abstract

This research designed a hand infusion splint for school-age children with an age range of 7-12 years according to the anthropometry and contours of the child's hand so that children who underwent infusion on the hand did not experience medical complications during treatment or post-hospital trauma. The method used in the design of infusion splint for school-age children is Quality Function Deployment (QFD) and House of Quality (HOQ) to get design criteria according to consumer needs, while the software used, namely SPSS and Autodesk Professional Inventor to build models. The size of the infusion splint was determined based on the hand anthropometry of school-age children. The specifications of the hand infusion splint of school-age children according to the needs of pediatric patients have a length of 189 mm, a thickness of 9 mm, and a width of 46.3 mm for arm supports, and 37.1 mm for hand supports obtained from the highest priority value in the House of Quality, namely the design of the dimensions of the splint.
Peningkatan Nilai Kekerasan Baja Karbon Rendah AISI 1018 melalui Proses Pack Karburizing dengan Media Batok Kelapa Imam Prabowo; Muhammad Ichsanudin; Abdu Halim Wibowo; Fajar Paundra; Eko Pujiyulianto
Journal of Metallurgical Engineering and Processing Technology Vol 3, No 2 (February 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v3i2.8701

Abstract

Low carbon materials are one of the steels which have a composition of carbon ranging from 0.005 to 0.3%. Generally, these materials have good ductility and flexibility so they are good enough to be applied for automotive industry’s components. Unfortunately, they do not possess an excellent hardness as well as wear resistance. Thus, in order to enhance the hardness and wear resistance, carburizing is obligatory required. The carburizing process is a diffusion of carbon from the higher to lower concentration in a high temperature condition, following the gradient concentration. In addition, the process demands a source of active carbons and energizer. In this study, the coconut shells are possibly harnessed as a high-rich carbon material besides charcoals due to its availability and environmentally-friendly materials. Hardness test is measured in ten distinct points by using vicker-hardness scale in accordance with ASTM E 384. The hardness of the AISI 1018 increases after pack carburizing process by nearly 20 HVN. It grows from 131 HVN before the process to 150 and 165 HVN after the heating by 900°C and 950°C respectively. The increase is affected by the diffusion of carbon from coconut shells into the layer of AISI 1018 in which the coconut shells are having a higher carbon content compared to the layer. Furthermore, the higher heating temperature will accelerate the diffusion rate of carbon. As a result, the hardness of AISI 1018 at the higher heating temperature will also become larger.
Perawatan Mesin Alat Berat Wheel Loader PT. XYZ Firman Sri Bagaskara; Muhammad Rama Aditya; Dimas Aldyansyah; Dimas Maulana Aji; Felderico Andreas Sitanggang; M. Muhibbul Khairi; Fajar Paundra
Jurnal Teknik Mesin (Sinta 3) Vol. 20 No. 1 (2023): APRIL 2023
Publisher : Institute of Research and Community Outreach, Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jtm.20.1.18-23

Abstract

Wheel Loader adalah peralatan yang digunakan untuk memindahkan material dan memuatnya ke dalam dump truck. Tujuan dari penelitian ini adalah untuk mempelajari perawatan mesin pada Wheel Loader di PT. XYZ. Metode yang digunakan dalam pengumpulan data meliputi observasi, wawancara, dan studi pustaka. Berdasarkan hasil penelitian, perawatan mesin Wheel Loader dilakukan secara berkala melalui daily autonomous maintenance dan preventive maintenance untuk memastikan alat dapat bekerja dengan baik. Hal ini dibuktikan dengan adanya sampling oil dan filter cut tidak adanya partikel yang berbahaya.
Pengaruh Perlakuan Alkali Terhadap Kekuatan Tarik Bahan Komposit Serat Rumput Teki Zian Millenio; Fajar Paundra; H.T. Yudhistira; E. Pujiyulianto; Imam Prabowo
Journal of Applied Mechanical Technology Vol 1 No 1 (2022): Journal of Applied Mechanical Technology (JAMET)
Publisher : Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (533.459 KB) | DOI: 10.31884/jamet.v1i1.5

Abstract

Composite is a combination of two or more materials with different characteristics into a single unit. This study aims to determine the effect of immersion time of alkali (NaOH) on the tensile strength of composites reinforced teki grass. The alkaline immersion process was carried out with variations of 0 hours, 2 hours, 4 hours, and 6 hours with an alkali concentration of 5%. Tensile test using ASTM D3039 standard. The lowest tensile test results occurred in the 0-hour immersion variation of 4.15 MPa, while the highest tensile strength value occurred in the 4-hour immersion variation of 21.72 MPa.
The Effect of Pressure Variations on the Characteristics of Coconut Shell Based Briquettes Using Tapioca Starch Adhesive Devia Gahana Cindi Alfian; Marone J Tambunan; Fajar Paundra; Dicky J Silitonga; Lathifa Putri A; Muhammad Syaukani
ROTASI Vol 25, No 3 (2023): VOLUME 25, NOMOR 3, JULI 2023
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.25.3.23-32

Abstract

The very limited availability of energy on this planet is one of the main problems that concerns almost all countries. The presence of emergency energy indicates that energy usage is very high. Therefore, encouraging the use of new and sustainable energy sources is of utmost importance. Biomass energy can be the answer to overcoming the limitations of decreasing fossil assets, especially through the production of charcoal briquettes. Biomass energy is derived from plants or easily traceable natural materials that are abundant, such as wood waste, rice husks, bagasse, and coconut shells. Coconut shells, for example, can be a primary ingredient for making charcoal briquettes, using tapioca flour or starch as an adhesive. The briquettes can be produced using pressure variations of 50 kg/cm², 60 kg/cm², and 70 kg/cm², with a drying temperature of 100°C for 3 hours. The recommended ratio for making charcoal briquettes is 3 parts coconut shell to 1 parts tapioca flour adhesive. The purpose of this study is to compare the briquettes produced with coconut shell and tapioca flour adhesive to the SNI Briquette standard No.1/6235/2000. For the conducted tests, the results were as follows: the water content was 6.06%, the ash content was 5.9695%, the carbon content was 43.5946%, and the calorific value was 34,182.6808 calories. Additionally, the substance score yield was 26.845%, and the combustion rate was 0.12179 g/minute.
PENGARUH VARIASI TEKANAN DAN FRAKSI VOLUME PADA HYBRID COMPOSITE SERAT SABUT KELAPA DAN SERAT BAMBU BERMATRIKS RESIN POLYESTER TERHADAP KEKUATAN TARIK DAN BENDING Febryan Utama Putra; Fajar Paundra; Abdul Muhyi; Fuad Hakim; Lukman Triawan; Abdul Aziz
JURNAL FOUNDRY Vol. 6 No. 1 (2023): JURNAL FOUNDRY
Publisher : LPPM Politeknik Manufaktur Ceper

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62944/jf.v6i1.62

Abstract

Composite is a material that is formed from a combination of two or more constituent materials with a heterogeneous mixing process, which has different mechanical properties. This study aims to determine the effect of volume fraction and molding pressure of composite materials on tensile and bending strength. The volume fractions used are SK 25% & SB 5%, SK 20% & SB 10%, SK 15% & SB 15%, SK 10% & SB 20%, and SK 5% & SB 25%. Each change in printing pressure is carried out at a pressure of 60 bar, 70 bar and 80 bar. Composite testing was carried out using ASTM D3039 for tensile testing and ASTM D790 for bending testing. The results obtained are the highest tensile strength at E3 with a value of 23.573 MPa and the lowest tensile strength at C1 with a value of 9.199 MPa, then the highest bending strength at E2 with a value of 38.665 MPa and the lowest bending strength at B1 with a value of 30.318 MPa.
Pengaruh Suhu Pada Pengukuran Jarak Menggunakan Sensor Ultrasonik SR04/05 Berbasis Instrumentasi Maya Sabar Sabar; Duwi Hariyanto; Kisna Pertiwi; Handoyo Handoyo; Sastra Kusuma Wijaya; Zunanik Mufidah; Fajar Paundra; Muhammad Syaukani
Journal of Science, Technology, and Visual Culture Vol 1 No 1 (2021): Juli 2021
Publisher : Jurusan Teknologi Produksi dan Industri, Institut Teknologi Sumatera

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

Abstract

Penelitian ini menjelaskan tentang bagaimana pengaruh suhu pada perambatan gelombang ultrasonik di udara. Hal ini berkaitan dengan verifikasi keakuratan jarak pengukuran sensor ultrasonic sebagai alat ukur. Sensor yang digunakan dalam instrumentasi maya berupa sensor ultrasonik SR 05/04 sebagai sensor pengukur jarak dan sensor suhu LM35 digunakan sebagai acuan untuk mengukur suhu lingkungan. Tujuan penelitian ini adalah memverifikasi apakah kecepatan gelombang utrasonik di udara berpengaruh terhadap perubahan suhu serta mempengaruhi pengukuran jarak. Pada penelitian ini didapatkan hasil rata-rata nilai simpangan standar deviasi pengukuran jarak terkoreksi suhu adalah 0,114 sedangkan pengukuran jarak tanpa terkoreksi suhu adalah 0,1075. Hal ini menunjukan bahwa kenaikan perubahan suhu walaupun 1°C dapat mempengaruhi sensor ultrasonik dalam mengukur jarak. Secara umum instrumentasi maya mampu bekerja dan membaca besaran sensor-sensor serta melakukan perhitungan dan menampilkan data dengan sangat baik.
Pengaruh Orientasi Sudut Terhadap Faktor Delaminasi dan Nilai Kekuatan Tarik Pada Proses Pengeboran Komposit Fiberglass woven bermatriks Poliester Fajar Paundra; Eko Pujiyulianto; Abdul Muhyi; Firman Sri Bagaskara; Ilhan Manzeis; Ilham Ramadhan Siregar; Puguh Elmiawan
Infotekmesin Vol 15 No 2 (2024): Infotekmesin, Juli 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i2.2216

Abstract

Composite is a material that is formed from a combination of 2 or more materials. The orientation of the inclination angle of the webbing on the composite affects the tensile strength value. This research was conducted to determine the effect of variations in the angle of inclination of the webbing and the phenomenon of delamination on the value of tensile strength. The process of making fiberglass woven fiber composites and a mixture of resin and catalyst uses the vacuum bagging method. The variations used in this study are the angle of inclination of the webbing 0°, 15°, 30° and 45°. Tensile test specimens using the ASTM D638 standard. The specimens that have been cut will then be perforated with a diameter of 4 mm using a milling machine. Tensile testing was carried out using a Universal Testing Machine. The highest tensile strength value is at an angle of 0° with a value of 189.30 MPa and the lowest tensile strength is at an angle of 45° with a value of 34.25 MPa and for the value of the delamination factor has little effect on the value of tensile strength.
Effect of Layers on Delamination and Tensile Strength of Woven Fiber Composites with Polyester Matrix Fajar Paundra; Danang Istanto; Eko Pujiyulianto; Muhamad Fatikul Arif; Sri Hastuti
Jurnal Teknik Mesin (Sinta 3) Vol. 21 No. 1 (2024): APRIL 2024 (SINTA 3)
Publisher : Institute of Research and Community Outreach, Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jtm.21.1.11-20

Abstract

A composite is a combination of 2 or more different materials. The composite joining process can use adhesives or mechanically by making holes. During the process of making holes in the composite, it can cause delamination in the composite. Delamination and layer thickness greatly influence the strength of hollow composite joints. This research aims to determine the effect of delamination factors and the number of layers on the tensile strength value of the composite. The materials used in this research are polyester resin and woven glass fiber. The method used is vacuum bagging with variations in the number of layers, namely 3 layers, 4 layers, 5 layers, and 6 layers. Tensile testing refers to ASTM D638 standards. Specimens that have been cut according to standards will then be perforated in the center with a hole diameter of 4 mm using a milling machine. The highest tensile strength value was obtained in the 6-layer variation of 237.448 MPa and the lowest value was obtained in the 3-layer variation of 186.221 MPa. The delamination value greatly influences the tensile strength of the composite, where the more layers, the delamination value will decrease and increase the tensile strength of the composite.
Co-Authors A. Juan Abdu Halim Wibowo Abdul Aziz Abdul Muhyi Abdul Muhyi Ahmad Waldi Chaniago Amelia Oktavia Anas Maulana Andi Rahadiyan Wijaya Danang Istanto Devia Gahana Cindi Alfian Dicky J. Silitonga Dimas Aldyansyah Dimas Maulana Aji Duwi Hariyanto Eko Pujiyulianto Eko Pujiyulianto Eko Pujiyulianto Fajar Perdana Nurrullah Febri Budi Darsono Febryan Utama Putra Felderico Andreas Sitanggang Firman Sri Bagaskara Firman Sri Bagaskara Fuad Hakim Fuad Mulkan Al Machzumy Gigih Tujo Pradibyo H.T. Yudhistira Hadi Teguh Yudistira, Hadi Teguh Hamid Abdillah Handoyo Handoyo Hasan Bisri Bisri I Gusti Bagus Budi Dharma Ilham Ramadhan Siregar Ilhan Manzeis Imam Prabowo Imam Prabowo Indriyani Indriyani Jukepri Brain Meliala Kisna Pertiwi Lathifa Putri A Lukman Triawan M. Fahan Sidik M. Muhibbul Khairi M. Rafi Kurniawan Marone J Tambunan Mufidah, Zunanik Muhamad Fatikul Arif Muhammad Ichsanudin Muhammad Rama Aditya Muhammad Rizky Hikmatullah Muhammad Syaukani Muhsin Muhsin Muhsin Nurdin, Akhmad P. Elmiawan P. Yunesti Puguh Elmiawan Puguh Elmiawan Puguh Elmiawan Putty Yunesti Sabar Sastra Kusuma Wijaya Sri Hastuti Syamsul Hadi Hadi Triyono Triyono Zian Millenio