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Andita Nataria Fitri Ganda
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Jurnal Rekayasa Mesin
Published by Universitas Negeri Surabaya
ISSN : 2337828X     EISSN : 29887429     DOI : https://doi.org/10.26740/jrm.v9i03
Core Subject : Science, Engineering,
Aerospace Engineering Automotive Engineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
The Journal of Mechanical Engineering (JRM) is published three times a year, in April, August, and December, by the Applied Bachelor Degree Program (D4) in Mechanical Engineering, Faculty of Vocational Studies, Universitas Negeri Surabaya (UNESA). It serves as a medium of information and a forum for Development of Technology, Numerical Studies, Experimental Studies, and Applied Research in the field of Mechanical Engineering. The journal contains scientific papers, summaries of research results, literature reviews, and original critical ideas. The editorial team invites researchers, practitioners, and anyone interested in contributing articles that have not been published elsewhere. The themes of the articles include Machining Materials and Metallurgy Manufacturing Processes Mechanical Design Control Systems
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 305 Documents
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Analisis Sifat Mekanik Bioplastik PLA–Tepung Kulit Pisang pada Beragam Suhu Pemrosesan melalui Injection Molding Maulana, Adimashqi; Fitri Ganda, Andita Nataria; Puspitasari, Dewi; Abdulloh, Isa Yuanata
Jurnal Rekayasa Mesin Vol 11 No 01 (2026): JRM April 2026 (In Press)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jrm.v11i01.74650

Abstract

This study analyzes the effect of injection molding processing temperature variation on mechanical properties of bioplastic based on polylactic acid (PLA) reinforced with bananapeel flour. Material was processed at three different temperatures (200°C, 225°C, 250°C) with70% PLA–30% banana peel flour composition. Tensile testing was performed using Universal Testing Machine (UTM) according to ASTM D638 Type I standard to measure tensile strength and elastic modulus. Results showed that 225°C produced the highest tensile strength of 50.96 MPa and elastic modulus of 49.96 MPa, far exceeding 200°C (27.09 MPa;21.99 MPa) and 250°C (35.97 MPa; 30.40 MPa). This research confirms that there is an optimum temperature of 225°C that produces the best balance between material structure homogeneity and matrix–filler interfacial bonding, making PLA–banana peel flour bioplastic potentially suitable as a conventional plastic substitute with competitive mechanical properties.
Studi Pengaruh Suhu Pemrosesan Terhadap Kekuatan Tarik Bioplastik PLA (Polylactic Acid) dan Tepung Kulit Singkong Ashrori, Moch. Kharis; Puspitasari, Dewi; Ganda, Andita Nataria Fitri
Jurnal Rekayasa Mesin Vol 11 No 01 (2026): JRM April 2026 (In Press)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jrm.v11i01.74903

Abstract

Conventional plastics are widely used due to their good mechanical properties; however, they pose serious environmental problems because they are difficult to degrade naturally. Therefore, bioplastics based on renewable resources, such as Polylactic Acid (PLA) reinforced with cassava peel flour as a natural filler, have been developed as an environmentally friendly alternative. This study aimed to analyze the effect of processing temperature variations on the mechanical properties and biodegradation rate of PLA–cassava peel flour bioplastics. An experimental method was employed with processing temperatures of 200 °C, 225 °C, and 250 °C. The material composition consisted of 70 wt% PLA and 30 wt% cassava peel flour, which was processed using injection molding through the melt intercalation technique. Tensile test specimens were prepared according to ASTM D638 Type I standards. Mechanical characterization was conducted using a Universal Testing Machine (UTM), while biodegradation behavior was evaluated using the soil burial test for four weeks. The results showed that a processing temperature of 225 °C produced the highest tensile strength of approximately 67 MPa. Increasing the temperature to 250 °C resulted in a decrease in tensile strength and elongation due to thermal degradation, although the elastic modulus and biodegradation rate increased. These findings indicate that processing temperature plays a crucial role in controlling the relationship between processing conditions, material structure, and mechanical properties of PLA–cassava peel flour bioplastic. Keywords: Bioplastic, Polylactic Acid, Cassava Peel Flour, Processing Temperature, Tensile Properties.
ANALISIS VARIASI KOMPOSISI PLA DENGAN TAMBAHAN PATI KULIT SINGKONG TERHADAP SIFAT UJI TARIK rachman, aris; Dewi; Andita
Jurnal Rekayasa Mesin Vol 11 No 01 (2026): JRM April 2026 (In Press)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jrm.v11i01.74910

Abstract

Plastic waste derived from petroleum-based materials poses serious environmental challenges, driving the development of environmentally friendly alternatives such as bioplastics. One promising approach is the incorporation of natural fillers into polylactic acid (PLA) to enhance its properties and biodegradability. This study aims to investigate the effect of varying compositions of PLA and cassava peel starch on the mechanical properties of bioplastics, particularly tensile strength, elastic modulus, and elongation. Bioplastics were fabricated using an injection molding process with cassava peel starch contents of 0 wt%, 10 wt%, 20 wt%, and 30 wt%. Tensile testing was conducted according to ASTM D638 standards using a Universal Testing Machine. The results indicate that the addition of cassava peel starch significantly influences the mechanical performance of the bioplastics. The optimal composition was achieved at 30 wt% starch content, exhibiting the highest tensile strength of 68.5 MPa, elastic modulus of 4515.15 MPa, and elongation of 6.3%. These improvements suggest enhanced interfacial bonding and more effective filler dispersion within the PLA matrix. The findings demonstrate that PLA–cassava peel starch bioplastics have strong potential as sustainable materials with improved mechanical performance for broader industrial applications.
Analisis Pengaruh Variasi Kecepatan dan Karakteristik Roda Penggiling Terhadap Kapasitas Hasil Penggilingan Dimas Aryaputra; Arya Mahendra Sakti; Dyah Riandadari; Nurul Ainu Sofi
Jurnal Rekayasa Mesin Vol 11 No 01 (2026): JRM April 2026 (In Press)
Publisher : Universitas Negeri Surabaya

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

Abstract

Optimizing the processing of agricultural waste, especially peanut hulls, is a significant challenge inincreasing the economic value of food byproducts. This study aims to analyze the performance of a disc millthrough experiments exploring two key mechanical parameters: variations in shaft rotational speed and thegeometric characteristics of the grinding wheel (number of blades). Experiments were conducted using anFFC-15 machine, where the grinding wheel was varied to 2, 3, and 4 blades, combined with variations in shaftrotational speed of 2400, 2600, and 2800 rpm. The results showed a nonlinear phenomenon, namely thatincreasing the number of blades did not always increase efficiency. The 4-blade configuration actually causedair turbulence and flow resistance, thus reducing production capacity, while the 2-blade configurationtriggered the release of many fine particles. The best performance was achieved with a 3-blade configurationat 2800 rpm, which produced the highest grinding capacity of 0.095 kg per minute. This configuration offersthe best balance between impact frequency and material circulation space, thus becoming a technicalrecommendation for improving the efficiency of the husk waste processing machine.
Rancang Bangun Mesin Uji Abrasi Material Alumunium Terhadap Pelumasan Oli Eko Saputra, Aditiya Wahyu; Wulandari, Diah; Sakti, Arya Mahendra; Puspitasari, Dewi
Jurnal Rekayasa Mesin Vol 11 No 01 (2026): JRM April 2026 (In Press)
Publisher : Universitas Negeri Surabaya

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

Abstract

Abrasion is a common wear mechanism that occurs in machine components due to repeated frictional contact, particularly in aluminum materials that are widely used because of their light weight and corrosion resistance. Nevertheless, aluminum remains susceptible to wear when the lubrication system does not perform optimally. This study aims to design and develop a laboratory-scale abrasion testing machine and to analyze the effect of rotational speed on the wear behavior of aluminum 6061 under oil lubrication. The research employed a research and development method consisting of design, fabrication, assembly, functional testing, and abrasion testing stages. Abrasion tests were conducted at rotational speeds of 500, 1000, and 1500 RPM with a constant load of 3 kg, a test duration of 30 minutes, and Shell SAE 10W-30 oil as the lubricant. Quantitative data were obtained from the measurement of specimen mass loss before and after testing, while qualitative analysis focused on machine performance and operational stability during testing. The results indicate that the developed abrasion testing machine operated properly and was capable of producing consistent wear data. The mass loss of aluminum specimens increased with higher rotational speeds, with the highest average wear observed at 1500 RPM. This study contributes by providing a simple and cost-effective abrasion testing machine for laboratory applications and by offering insights into the influence of rotational speed on the wear behavior of aluminum under lubricated conditions.

Page 31 of 31 | Total Record : 305

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