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All Journal JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Jurnal Rekayasa Material, Manufaktur & Energi IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) IRA Jurnal Pengabdian Kepada Masyarakat
zulfikar, Achmad Jusuf
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Aerospace Engineering Automotive Engineering Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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ANALISA GAYA DAN SUDUT RAHANG PADA ALAT PEMBUKA BUAH DURIAN METODE GERAK PUTAR RELATIF Nainggolan, Danis; zulfikar, Achmad Jusuf; umroh, bobby
JMEMME (JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY) Vol 3, No 2 (2019): EDISI DESEMBER
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (208.582 KB) | DOI: 10.31289/jmemme.v3i2.2813

Abstract

Pada prinsipnya, teknologi dipergunakan manusia untuk memberikan kemudahan dan peningkatan terhadap efisiensi kerja, baik ditinjau dari sisi waktu maupun biaya produksi. Pada penelitian ini, sebuah alat pembuka buah durian dengan metode rahang berputar telah dibangun dan telah diuji. Analisa gaya untuk membuka buah durian dengan menggunakan alat ini menjadi fokus utama dalam penelitian ini. Tujuan penelitian ini ialah mengukur beban dan sudut pengupasan buah durian serta menghitung kapasitas dan efisiensi alat tersebut. Metode pengambilan data pengujian ialah dengan meletakkan alat pengukur beban pada alat pembuka buah durian dan mencatat nilai beban yang diberikan selama proses pengujian berlangsung. Buah durian diletakkan dalam rahang khusus yang dapat digerakkan berputar relatif terhadap pisau. Jenis buah durian yang dipergunakan dalam penelitian ini terdiri dari buah durian matang dan buah durian mentah. Hasil yang diperoleh ialah gaya rata-rata yang dibutuhkan untuk membuka buah durian matang ialah 99 N dengan sudut rahang rata-rata 45o dan waktu rata-rata 9,5 detik. Sedangkan untuk buah durian mentah, gaya rata-ratanya ialah 134 N dengan sudut rahang rata-rata hingga 80o dan waktu proses pembukaan rata-rata hingga 15 detik. Kapasitas alat untuk buah matang ialah 185 buah/jam dan buah mentah 144 buah/jam. Efisiensi alat untuk buah matang dan mentah adalah sama, yaitu mencapai hingga 85%.
DESIGN AND MANUFACTURE OF SKATEBOARD FROM BANANA STEM Zulfikar, Achmad Jusuf; Umroh, Bobby; Siahaan, Muhammad Yusuf Rahmansyah
JMEMME (JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY) Vol 3, No 2 (2019): EDISI DESEMBER
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (241.858 KB) | DOI: 10.31289/jmemme.v3i2.3022

Abstract

A skateboard is a small piece of wood shaped like a surfboard with four wheels attached to it that is used to glide on a certain track. In general, this tool is made using wood material taken from nature and vulnerable to environmental damage issues. In this research, the waste of banana stems will be processed into the main raw material for skateboarding. The type of material chosen is the type of composite material with banana stem waste selected as reinforcement and polyester resin as the matrix material. The purpose of this research is to design and manufacture a skateboard made of composite fiber reinforced banana stem fibers and to test its flexural strength to obtain the characteristics of the material formed. The design was carried out with the help of the 2007 version of Autocad software by following commercial skateboard standards.  Flexural testing was carried out at the Impact and Fracture Research Center laboratory, Faculty of Engineering, University of North Sumatra. Static static testing of polymer composite board specimens from banana stems obtained the average value data for the composition of 5% banana stems is 9.81 MPa, for the composition of 10% banana stems an average of 13.60 MPa, and composition of 15% banana stems the average is 27.20 MPa. 2. The analysis shows that the best composition is 15% of banana stems, with an average flexural strength value of 27.20 MPa. Therefore, the composition used in this study is the composition of 15% reinforcement of banana stems.
Analisis Metode Split Tensile Test Komposit Laminat Hybrid Jute E-Glass Akibat Beban Tarik Beton Kolom Silinder Tambusay, M. Ibnu; Zulfikar, Achmad Jusuf; Iswandi, Iswandi
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 1 No 2 (2022): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v1i2.16

Abstract

In this study, reinforcement of the concrete structure was done by coating it with a laminate composite material from a combination of reinforcement from natural materials (woven jute cloth sheets) and synthetic materials (woven e-glass fiber sheets). The purpose of this study was to determine the split tensile strength of cylindrical column concrete (BKS) using the split tensile test method due to the application of e-glass laminate hybrid composite sheath (KLHJG), to analyze the validity of the data using the normally distributed data method (DTN). on the results of the shear strength test of the KLHJG sheath as reinforcement for BKS, and analysis of the effect of applying KLHJG's sheath on the tensile strength of BKS. Specimens were printed based on the ASTM C496 test standard by immersion in clean water for 28 days and drying in the open air for 28 days. The KLHJG variation consists of JGJ, JJG, JJJG, JGJG, and GJGJ. Each variation consists of 3 repetitions of the test. The process of providing KLHJG casings to BKS uses the Vacuum Bagging method. Data validity uses the probability density function method. The results of the study show that the provision of KLHJG can increase the split tensile strength by up to 800%. Thus, the KLHJG application has the potential to be applied as a BKS booster.
Analisis Kekuatan Tarik Belah Komposit Laminat Jute sebagai Penguat Beton Kolom Silinder Berdasarkan Metode Penyerapan Energi Bahan Lubis, Pramdya A.T.; Zulfikar, Achmad Jusuf; Iswandi, Iswandi
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 1 No 2 (2022): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v1i2.21

Abstract

The purpose of this study is to calculate the amount of energy that can be absorbed (toughness) of the material based on the graph of the results of the split tensile test of cylinder column concrete specimens (BKS) reinforced with laminated jute composite (KLJ) and analysis of the comparison between split tensile strength (KTB) and material toughness from the results split tensile test of BKS specimen reinforced by KLJ. The test specimens were printed based on the ASTM C496 test standard using the Vacuum Bagging method. Specimen variations consist of 1 to 4 layers of KLJ and one variation without KLJ sheath as a control specimen. The split tensile test used the UTM test tool with each variation being carried out with 3 repetitions. Calculation of Material Toughness Energy (EKB) using the Trapezoidal Numerical Integration method. The results of the study showed that giving KLJ boosters to BKS was able to increase EKB up to more than 1000% starting with 2 layers of sheathing. Thus the provision of KLJ to BKS can be recommended as a strengthening material for concrete column structures.
Analisis Kekuatan Mekanik Komposit Polimer Diperkuat Serbuk Kulit Kerang Zulfikar, Achmad Jusuf; Ritonga, Din Aswan A.; Pranoto, Siswo; Nasution, Fadly A. Kurniawan; Arif, Zainal; Junaidi, Junaidi
Rekayasa Material, Manufaktur dan Energi Vol 6, No 1: Maret 2023
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v6i1.13599

Abstract

In recent decades, the development of composite material technology has continued to increase rapidly and has been used for various applications as an alternative material to replace metal. In line with growing environmental issues, the utilization of natural materials which are abundant in nature and easy to find is the main priority for composite building materials. In this study, shell powder was used as a reinforcing material for epoxy polymer composites. The aims of this study were to obtain the average compressive, tensile, and flexural strength of shell powder-reinforced polymer composite materials, to calculate the distribution of test results using the PDF method, and to calculate the contribution of shell powder to the mechanical properties mentioned using the ANOVA method. The tensile, compressive, and flexural test specimens follow the test specimen standards of ASTM D638, ASTM D7264, and ASTM D695 respectively. The composition of shell powder consists of 10%, 30%, and 50%. Testing of these mechanical properties using a UTM-type hydraulic test equipment model WEW-300D with a capacity of 300 kN. The test results show an increase in the mechanical properties of the material. The increase occurred in compressive and flexural strength where the composition was given up to 30% and 50%, namely between 120 – 125 MPa. However, increasing the composition of shell powder at 30% and 50% actually resulted in a decrease in tensile strength between 12 – 9 MPa. Finally, based on the results of ANOVA analysis, it was shown that the addition of shell powder as a reinforcement for polymer composites significantly improved their mechanical properties.
Analisis Kekuatan Mekanik Pipa Air dari Bahan Komposit Serbuk Kulit Kerang Zulfikar, Achmad Jusuf; Siahaan, M Yusuf R; Irwan, Ade; Nasution, Fadly A. Kurniawan; Ritonga, Din Aswan A.
Rekayasa Material, Manufaktur dan Energi Vol 5, No 2: September 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i2.11938

Abstract

Shellfish is one of the sources of natural wealth that is quite abundant and easy to obtain in the province of Sumatera Utara. In this study, shellfish will be used as an alternative raw material for the manufacture of water pipes. This study aims to obtain the average strength of the material against the bending and compressive loads imposed on the outer surface of the water pipe, calculate the distribution of the test result data by the Probability Density Function (PDF) method, and calculate the contribution of clamshell powder to the bending and compressive strength of the water pipe with the Anova and Tukey methods. Specimens are molded in the form of 2" water pipes according to SNI standards 06-0084-2002. Bending and pressing testing using ASTM D7264 and ASTM D695 respectively. Processing the distribution of test data using the PDF method, the calculation of variable contributions using the Anova method, and the comparison between variables with the Tukey method. The result obtained the best bending strength at a composition of 10% by weight, namely 3.3177 MPa, and the best compressive strength at a composition of 50% by weight of 4.37 MPa. Based on the calculations of the Anova and Tukey methods, the application of clamshell powder significantly affects the bending strength compared to its compressive strength, which is the composition of 10% by weight.
Analisis Kekuatan Tekan Selubung Komposit Laminat E-glass pada Beton Kolom Silinder dengan Metode Vacuum Bagging Siregar, Doni Alfiah; Zulfikar, Achmad Jusuf; Siahaan, M. Yusuf Rahmansyah; Siregar, Rakhmad Arief
Rekayasa Material, Manufaktur dan Energi Vol 5, No 1: Maret 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i1.10259

Abstract

This study aims to obtain the average compressive strength of cylindrical column concrete specimens reinforced with an e-glass fiber laminate composite wrap based on variations in the number of wraps. In addition, in this study, the compressive strength and damage patterns will be analyzed to obtain the performance of the sheath in the concrete structure. The test specimens were molded according to the ASTM C39 standard with a diameter of 50 mm and a length of 150 mm. The process of applying laminated composite wrap to concrete specimens is carried out using the vacuum bagging method. The compressive strength test on the specimen is carried out by providing an axial load on the specimen until it failures. The results obtained are that the compressive strength of the specimen has increased significantly due to the provision of e-glass fiber wrap. A significant increase in the compressive strength of concrete specimens occurred in 3 layers of e-glass fiber wrap which reached more than 60%. Furthermore, the ability of the e-glass fiber wrap in protecting the cylindrical concrete structure due to the applied load also experienced an increase in performance in the 2 and 3 layers of the e-glass fiber wrap.
Pelatihan Penggunaan Mesin Sekrap Bagi Mahasiswa di Growth Centre LLDIKTI Wilayah - I Zulfikar, Achmad Jusuf; Supriatno, Supriatno; Candra, Ifan Aulia; Nurdiana, Nurdiana
IRA Jurnal Pengabdian Kepada Masyarakat (IRAJPKM) Vol 1 No 1 (2023): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajpkm.v1i1.53

Abstract

Shaping machine training for students significantly benefits developing technical skills, preparing them for the world of work, and increasing their understanding of manufacturing processes and job safety. A shaping machine is a tool to machine metal surfaces using a reciprocating linear motion. This machine uses a blade moving back and forth to remove a thin metal layer from the work surface and create the desired shape. It is essential to adapt the training method to the needs and characteristics of the participants and provide a safe and conducive environment for learning and practising the use of the shaping machine. Evaluation of technical skills, assessment of theoretical knowledge, and review of the work results of the participants. The experience gained during the training will vary for each participant depending on background, level of expertise, and commitment to learning. The results of this training are expected to increase knowledge and understanding of shaping machines. Participants will learn in-depth about the basic principles of shaping machines, their components, and proper operating techniques.
Analisis Potensi Energi Angin Menggunakan Turbin Horizontal di Kawasan Wisata Mangrove Desa Tanjung Rejo, Kecamatan Percut Sei Tuan Idris, Muhammad; Zulfikar, Achmad Jusuf; Darianto, Darianto; Iswandi, Iswandi; Jufrizal, Jufrizal; Hermanto, Tino; Haniza, Haniza; Harahap, Uun Novalia
IRA Jurnal Pengabdian Kepada Masyarakat (IRAJPKM) Vol 2 No 2 (2024): Agustus
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajpkm.v2i2.125

Abstract

The tridharma of higher education is the main task and function for every lecturer that must be carried out every semester. One of the activities of the tridharma of higher education is community service which aims to make a scientific contribution owned by each lecturer. On this occasion, the UMA mechanical engineering study program had the opportunity to carry it out in Tanjung Rejo village, Percut Sei District. The master who owns the mangrove forest tourist attraction. The tourist attraction is located on the coast of the Strait of Malacca, where geographically it has the potential for renewable energy, namely wind energy. Based on the measurement data, the average wind speed was obtained 2 m/s. From the potential power that can be generated through a horizontal type wind turbine theoretically 59.8 W. Actually, this turbine has an average power of 20.9 W. This difference occurs due to an efficiency factor of 35%. The potential of wind energy in Tanjung Rejo Tourism Village is very promising for development. This effort will not only increase the energy independence of the village, but also reduce carbon emissions and preserve the environment.
Co-Authors Arif, Zainal Bobby Umroh Candra, Ifan Aulia Darianto, Darianto Haniza Harahap, Uun Novalia Irwan, Ade Iswandi Iswandi Jufrizal Jufrizal Junaidi Junaidi Lubis, Pramdya A.T. Muhammad Idris Nainggolan, Danis Nasution, Fadly A. Kurniawan Nurdiana Nurdiana Ritonga, Din Aswan A. Siahaan, M Yusuf R Siahaan, M. Yusuf Rahmansyah Siahaan, Muhammad Yusuf Rahmansyah Siregar, Doni Alfiah Siregar, Rakhmad Arief Siswo Pranoto Supriatno, Supriatno Tambusay, M. Ibnu Tino Hermanto