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All Journal Jurnal Rekayasa Material, Manufaktur & Energi Hasil Pengabdian Kepada Masyarakat Jurnal Teknovasi : Jurnal Teknik dan Inovasi Mesin Otomotif, Komputer, Industri dan Elektronika Multitek Indonesia : Jurnal Ilmiah Jurnal Ilmiah Teknik Mesin "MEKANIK" Ihsan: Jurnal Pengabdian Masyarakat Jurnal Pendidikan Vokasi Otomotif ABDI SABHA (Jurnal Pengabdian kepada Masyarakat) International Journal of Economic, Technology and Social Sciences (Injects) Jurnal Polimesin
Ahmad Marabdi Siregar
Universitas Muhammadiyah Sumatera Utara
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation

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Pengenalan Sistem Kerja Dan Pemberian Mesin Pencacah Botol Plastik Untuk Menambah Penghasilan Panti Asuhan Ahmad Marabdi Siregar; Chandra A Siregar; Affandi Affandi
JURNAL PRODIKMAS Hasil Pengabdian Kepada Masyarakat Vol 4, No 2 (2020)
Publisher : Universitas Muhammadiyah Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (521.211 KB) | DOI: 10.30596/jp.v4i2.6315

Abstract

 Bila sampah plastik bisa diolah dan dikelola secara optimal tentu akan sangat mengurangi jumlah sampah plastik di daerah sekitar panti asuhan, disamping juga dapat menambah dan meningkatkan pendapatan panti asuhan. Kegiatan pengabdian ini dilaksanakan di Panti Asuhan Putra Muhammadiyah Cabang Medan kota yang dihuni oleh para pemuda yang berusia sekolah dan produktif. Pelaksanaannya dalam bentuk Sosialisasi Program Kemitraan Pengembangan Muhammadiyah  (PKPM), pembuatan mesin pencacah sampah plastic, pelatihan penggunaan mesin pencacah plastik; dan pendampingan untuk konsultasi. Metode yang digunakan dari sosialisasi, ceramah, pendampingan, tanya jawab, dan praktik serta pemberian mesin pencacah botol plastik. Mesin pencacah botol plastik ini telah disumbangkan dan Kepala panti asuhan putra Bapak Dr.H. Azamris Chanra, M.AP serta pengurus panti asuhan lainnya berterimakasih kepada UMSU dan Pelaksana PKPM Internal UMSU 2019-2020 dan pengurus panti asuhan akan memamfaatkan mesin pencacah botol plastik serta menjadikannya salah satu sumber pendapatan untuk kelangsungan panti asuhan.    
DESING AND MANUFACTURE OF PROTOTYPES DUA TIPE ROTOR TURBIN ANGIN SUMBU VERTIKAL SEBAGAI OBJEK PENELITIAN STUDI EKSPERIMENTAL ahmad marabdi Siregar
Jurnal Teknovasi : Jurnal Teknik dan Inovasi Vol 4, No 2 (2017): Teknovasi Oktober 2017
Publisher : LPPM Politeknik LP3I Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55445/teknovasi.v4i2.14

Abstract

Perancangan poros pada turbin nantinya akan mendukung Studi ekperimental untuk melihat dan mengamati amplitudo getaran poros turbin angin sumbu vertikal sebagai pembangkit listrik alternatif, maka penelitian dan studi eksperimental tersebut akan membutuhkan prototype turbin angin yang akan diuji pada alat uji wind tunnel.
ANALISA KOROSI ATMOSFERIK BAJA KARBON RENDAH DI KECAMATAN MEDAN BELAWAN affandi affandi; Syifaul Huzni; Ahmad Marabdi Siregar; Chandra A Siregar; Arya Rudi Nasution; Iqbal Tanjung; Syarizal Fonna
MULTITEK INDONESIA Vol 14, No 2 (2020): Desember
Publisher : Universitas Muhammadiyah Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24269/mtkind.v14i2.2841

Abstract

ABSTRAK Korosi atmosferik sangat dipengaruhi oleh kondisi topografi dan iklim atau lingkungan, seperti temperatur, kelembaban, dan kandungan bahan kimia dalam udara sangat menentukan laju korosi. Kecamatan Medan Belawan adalah daerah pesisir Kota Medan  yang berbatasan langsung pada Selat Malaka. Kecamatan Medan Belawan akan difokuskan sebagai kawasan industri (industrial park) dan juga jasa penunjang aktivitas pelabuhan seperti pergudangan, pusat perkantoran, galangan kapal, dan industri perikanan.. Saat ini jembatan dan bangunan-bangunan konstruksi atau komponen logam seperti seng, tembaga serta besi-baja sudah terserang oleh korosi. Objektif dari penelitian ini adalah untuk melakukan analisis laju korosi atmosferik baja karbon rendah di kecamatan medan belawan di tiga titik lokasi dengan notasi yaitu  A, B, dan C. Spesimen uji yang digunakan pada penelitian ini adalah baja bentuk strip, baja segi empat, dan baja tulangan dengan proses pengukuran laju korosi mengikuti standart ASTM G-50 dan ASTM G-1. Pengukuran laju korosi dilakukan selama dua belas bulan, adapun hasil pengukuran laju korosi rata-rata di lokasi A : 0,573 mpy, laju korosi rata-rata di lokasi B : 0,604 mpy, dan laju korosi rata-rata lokasi C : 0.262 mpy. Maka dapat disimpulkan laju korosi baja karbon rendah di Kecamatan Medan Belawan dalam kategori outstanding dan sangat aman digunakan untuk kebutuhan konstruksi di lokasi tersebut. ABSTRACT Atmospheric corrosion is highly influenced by topographical and climatic conditions or environments, such as temperature, humidity, and chemical content in the air strongly determines the rate of corrosion. Medan Belawan Sub-district is a coastal area of Medan that borders directly on the Straits of Malacca. Medan Belawan Sub-district will be focused on an industrial park and also support services such as warehousing, office centers, shipyards, and fishery industries. Currently, bridges and construction buildings or metal components such as zinc, copper, and iron-steel have been attacked by corrosion. The objective of this research is to analyze the atmospheric corrosion rate of low carbon steel in the sub-district of Medan Belawan at three location points with the notation A, B, and C. Test specimens used in this study were strip-shaped steel, rectangular steel, and reinforcing steel with the corrosion rate measurement process follows the ASTM G-50 and ASTM G-1 standards. The measurement of corrosion rate was carried out for twelve months, As for the results of the measurement of the average corrosion rate of location A: 0.573 mpy, the average corrosion rate of locationt B: 0.604 mpy, and the average corrosion rate of location C: 0262 mpy. It can be concluded low carbon steel corrosion rate in Medan Belawan Sub-district in the outstanding category and very safe to used for construction needs in the location.  
The Effect of Addition of Agave Sisalana Fiber and Sikacim Concrete Additive on Tensile Strength and Concrete Absorption Fahrizal Zukarnain; Kurniawan Syaputra; Sri Frapanti; Rizki Efrida; Ahmad Marabdi Siregar; Ika Pratiwi Pujianti; Hilda Nisti Zendrato
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.v5i2.12566

Abstract

This paper presents an experimental study that was carried out to determine the potential of natural fiber Agave Sisalana and sikacim concrete additive chemicals on concrete used as construction materials. The concrete mix ratio 1: 1,34: 2,37 was prepared using a water-cement factor of 0,45. Sikacim concrete additive is added as much as 0,8% of the cement weight and a reduction of water as much as 15%. The Agave Sisalana fiber added as much as 0,3% and 0,6% of cement weight. Tensile strength concrete testing was carried out at the age of 21 and 28 days. The experiment result indicated that the tensile strength and water absorption in concrete increase with the addition of Agave Sisalana Fiber and sikacim concrete additive. Thus, the Agave Sisalana Fiber and Sikacim Concrete Additive can be used as an additive in concrete mixing to increase tensile strength.
STUDY OF STATICALLY TESTED HONEYCOMB STRUCTURE Sudirman Lubis; Ahmad Marabdi Siregar; Irpansyah Siregar
International Journal of Economic, Technology and Social Sciences (Injects) Vol. 2 No. 1 (2021): May 2021
Publisher : CERED Indonesia Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (709.144 KB) | DOI: 10.53695/injects.v2i1.165

Abstract

Honeycomb structure is a natural or man-made structure (material) that has the geometry of the honeycomb, in addition to being directed to the mass of light construction material, also obtained a degree of flexibility from the selection of such materials. The purpose of this study is to analyze the ability of energy absorption in static press testing. Energy absorption is a method of how an object attenuated due to external pressure. Energy absorption testing is conducted with static press tests, aluminum plate test objects in the form of honeycomb structures with different hexagonal size variations. This test will compare the results of voltage data – strain and energy suppression in each specimen that has been tested to see which is more efficient among three specimens of different hexagonal sizes. The final results of this test will be displayed using a voltage graph – horizontal and vertical position strain and energy absorption capability with horizontal and vertical testing positions. Therefore, the largest energy absorption result is in the horizontal testing position with a hexagonal size of 2 mm, and the smallest energy absorption is found in the vertical testing position with a hexagonal size of 6 mm.
Bimtek Dan Penyerahan Alat Penyapu Bidang Datar Gerak Mekanik Di Mesjid Taqwa Muhammadiyah Ranting Kedai Durian Cabang Medan Johor Elvy Sahnur Nasution; Ahmad Marabdi Siregar; Chandra A. Siregar; Rizki Efrida; Iqbal Raihan; Mirzal Lubis
ABDI SABHA (Jurnal Pengabdian kepada Masyarakat) Vol. 4 No. 3 (2023): Oktober
Publisher : CERED Indonesia Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53695/jas.v4i3.930

Abstract

Di Mesjid Taqwa Muhammadiyah Ranting Kedai Durian/Titi kuning, Cabang Medan Johor Petugas kebersihan masih menggunakan cara yang manual untuk membersihkan sampah. Sehingga merekapun mengalami kesulitan dalam pembersihan sampah setiap harinya. Dibutuhkan waktu yang lama dan energi yang banyak dari petugas kebersihan. Dengan suatu alat yang bekerja secara mekanis melakukan kegiatan menyapu dan mengumpulkan sampah dan dedaunan, dapat memudahkan dan meringankan pekerjaan petugas kebersihan, pelaksanaan dimulai dengan pengadaan alat sapu pembersih mekanik, menyusun rincian bimbingan teknis (BIMTEK), menjadwalkan kegiatan BIMTEK yang meliputi penjelasan cara kerja alat, simulasi dan praktek menggunakan alat, penjelasan perawatan alat, serta penyerahan alat kepada pengurus PRM dan Pengurus Mesjid taqwa kedai durian.
The Effect of Adding Aluminum Scrap to Motor Vehicle Mufflers to Reduce the Danger of Exhaust Emissions Ahmad Marabdi Siregar; Chandra Amirsyahputra Siregar; Khairul Umurani; Mulyadi Mulyadi; Tony Siagian; ML Teguh Samudra; Aufa Afika
Jurnal POLIMESIN Vol 21, No 1 (2023): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i1.3263

Abstract

Air pollution due to motor vehicle exhaust emissions is increased. Polluted air harms human health dan the environment. Consequently, it is essential to make a sustained effort to reduce air pollution. The purpose of this research is to investigate the effect of adding aluminum scrap to the exhaust system of a motor vehicle on gas emissions composition. The motor vehicle exhaust system was modified to accommodate aluminum scrap placement. A gas analyzer was utilized to observe exhaust gas composition, such as carbon dioxide, hydrocarbon, and carbon monoxide.  Aluminum scrap with different masses was wrapped around the exhaust's inner tube in 50 gr, 70 gr and 90 gr. The engine speed was maintained at 500 rpm throughout the testing process. It was found that the temperature of the outer exhaust tube is in a range of 40 degrees Celsius to 50 degrees Celsius. The results revealed that the most appropriate amount of aluminum scrap was 90 gr n to reduce carbon monoxide, hydrocarbon, and carbon dioxide in an exhausts gas. The surprising outcome was 76.78 % of carbon monoxide content declined, and furthermore hydrocarbon, and carbon dioxide content were deteriorated by 61.63% and 78.37%, respectively
Eksperimental Kekerasan Dan Struktur Mikro Pada Produk Foot Step Berbahan Limbah Alumunium Hasil Pengecoran Cetakan Pasir Silika Berpengikat Bentonit S, Dendi; Siregar, Ahmad Marabdi; Siregar, Chandra Amirsyah Putra; Nasution, Arya Rudi; Mahjudin, Mahyunirsyah
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.v5i1.10266

Abstract

This study aims to determine the results of the hardness values of castings using silica sand molds on market products and the microstructure contained in the results of various mold castings. Aluminum is often used as a material for making automotive components, machinery, art objects, and household appliances. Aluminum is a lightweight metal that is corrosion resistant. The foundry industry has now developed a lot from metal casting to non-metal casting. One of the metal casting technologies known today is metal casting technology with sand casting, the casting carried out in this study uses sand molds. The materials used in this study include silica sand, bentonite, water, aluminum waste, and the tools used include patterns, melting furnaces, scales, sand paper. In this research, testing, hardness test and microstructure test were carried out. The results of the hardness test on the standard specimen have an average value of 76.33 BHN, the first mold variation specimen has an average value of 63.69 BHN, and the second mold variation specimen has an average value of 63.84 BHN. In the microstructure test, the first variation of the castings had good aluminum dispersion, a high level of porosity, and for the second variation specimen the castings had good aluminum dispersion and low porosity. After seeing the results of the hardness and microstructure tests, it can be explained that the market product has a better value for the test results, this is because the results of the castings use permanent molds, and it can also be seen that the results of the microstructure affect a hardness value of the two results of the bentonite-binding silica sand mold castings.
Investigasi Peleburan dan Pembekuan Phasa Change Material (PCM) Paraffin Wax Sebagai Thermal Energy Storage Pada Pipa Handoko, R; Suwandi, A; Siregar, Chandra A; Siregar, Ahmad Marabdi
Rekayasa Material, Manufaktur dan Energi Vol 6, No 2: September 2023
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v6i2.16336

Abstract

Phase change materials (PCM) are materials that can change phase from solid to liquid and vice versa from water to solid. PCM is the most efficient material for storing heat energy in the form of latent heat. This study aims to investigate melting and freezing of PCM types of paraffin wax in pipes. The investigation was carried out in 3 experiments with heat source temperatures of 90 0C, 85 0C and 80 0C. To facilitate investigation, paraffin wax is placed in a transparent tube. During the smelting process, observations were made for 600 minutes, and data recording and shooting were carried out every 60 minutes. The result is that the melting of paraffin wax starts from the top of the heat source side. The higher temperature paraffin wax moves upwards and the lower one moves downwards. On freezing, also found the same thing. The flow pattern is affected by the temperature of the paraffin wax itself. In addition, it can also be concluded that the higher the temperature of paraffin wax, the higher its ability to store heat energy.
Pengaruh Putaran Spindle Dan Bahan Spesimen Terhadap Gaya Potong Pada Proses Pemesinan Turning Sucipto, Hadi; Nasution, Arya Rudi; Umurani, Khairul; Siregar, Ahmad Marabdi
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.v5i1.10267

Abstract

The turning Machining Process is one of the most commonly used machining processes in the industrial world, both in large-scale industries and small industries (home industries). The turning machining process is a process of changing the shape of the material by removing some of the material in the form of swells. During the machining process, there is an interaction between the tool and the workpiece specimen being cut which results in a change in the cutting force. The value of the cutting force is important information in research, this study aims to see the cutting force during the turning machining process using 2 different types. The research data collection method uses sensor tools, there are three sensors, namely the load cell sensor for cutting force, the photoelectric counter module for rotation (rpm), and the thermocouple for feeding temperature. The research variable used is the rotational speed of rpm starting from 90, 110, 150, and 190 rpm, the depth of cut is 0.3 mm. The cutting force generated on the DCGT insert chisel is 5.94N at 90 rpm, 4.13N at 110 rpm, 2.38N at 150 rpm, and at 190 rpm the DCGT chisel gets a force of 2.03N. Furthermore, the cutting force that occurs on the DCMT insert chisel is 2.94N at 90 rpm, 2.67N at 110 rpm, 2.61N at 150 rpm, and at 190 rpm the DCMT insert chisel gets a force of 2.51N. It can be concluded that the decrease in cutting force is influenced by the amount of rpm used, and the magnitude of the cutting force is due to vibrations that occur in the specimen caused by low rpm.
Co-Authors Affandi Affandi . Al-Amin, Surya Amiruddin, Arfis Arie Pranata Arya Rudi Nasution Aufa Afika Bobby Umroh Budi Dharma C A Siregar C A Siregar Chairul Arif Gunawan Surbakti Chandra A Siregar Chandra A Siregar Chandra A. Siregar Chandra Amirsyah Putra Siregar Chandra Amirsyah Siregar Dana Setiawan Dongoran, Rahmat Sati Efrida, Rizki Elvy Sahnur Nasution Fadillah, Fahri Fahrizal Zukarnain Fahrizal Zulkarnain Firdaus Hutasoit, Ricky Togu Hadi Sucipto, Hadi Handoko, R Harahap, Reza Elvandra Hilda Nisti Zendrato Ika Pratiwi Pujianti Iqbal Raihan Irfan Nofri Irham Rosadi, Irham khairul umurani Khairul Umurani Kurniawan Syaputra Lubis, Faisal Lubis, Riadini Wanty M, Moranelo Mahjudin, Mahyunirsyah Mirzal Lubis ML Teguh Samudra Muharnif M Mulyadi Mulyadi Nasution, Juliansyah Fauzan Pratama, Riza Fauzi Rahmatullah . Rizki Efrida S, Dendi Siagian, Nusyirwan Said Siregar, C A Siregar, Chandra A Siregar, Chandra Amirsyah Putra Siregar, Chandra Amirsyahputra Siregar, Irpansyah Siregar, Irpansyah Siregar, Munawar Alfansury Sri Frapanti Sudirman Lubis Suwandi, A Syarizal Fonna Syifaul Huzni Tanjung, Iqbal Tanjung, Iqbal Tony Siagian Umurani, K Umurani, Khairul Wahyu Kurniawan Wawan Septiawan Damanik Weriono