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All Journal Rekayasa Mesin JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian Jurnal Rekayasa Material, Manufaktur & Energi Dinamis Suara Teknik : Jurnal Ilmiah
Rakhmad Arief Siregar
Universitas Medan Area
Aerospace Engineering Agriculture, Biological Sciences & Forestry Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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ANALISIS NUMERIK ANALISIS NUMERIK TERHADAP SAMBUNGAN PROTOTIPE PENGGANTI TULANG PANGGUL PATAH PADA MANUSIA MENGGUNAKAN PERANGKAT LUNAK SOLIDWORKS: TERHADAP SAMBUNGAN PROTOTIPE PENGGANTI TULANG PANGGUL PATAH PADA MANUSIA MENGGUNAKAN PERANGKAT LUNAK SOLIDWORKS Yusuf Siahaan, Muhammad Yusuf Rahmansyah Siahaan; Siregar, Rakhmad Arief
DINAMIS Vol. 10 No. 1 (2022): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v10i1.8974

Abstract

Implan panggul membutuhkan bentuk geometris yang kompleks untuk merekonstruksi area cacat tulang yang tidak biasa, serta kekuatan mekanik yang tinggi untuk menahan beban tekan yang tinggi. Desain fiksasi penting pada implan panggul, mengingat bahwa fiksasi mengamankan implan panggul ke tulang yang tersisa, sementara juga menanggung sejumlah besar beban yang ditempatkan pada tulang. dalam penelitian ini, klasifikasi model sambungan dirancang untuk meningkatkan stabilitas mekanis implan panggul dan menganalisis sambungan protptipe panggul menggunakan simulasi solidworks. Dengan mengklasifikasikan suatu model sambungan. simulasi yang dilakukan dan distribusi tegangan antara daerah tegangan yang tinggi diamati daerah sambungan pada tulang panggul bagian pubis.
Analisis Numerik Terhadap Sambungan Prototipe Pengganti Rahang Patah Pada Manusia Menggunakan Perangkat Lunak Solidworks: Analisis Numerik Terhadap Sambungan Prototipe Pengganti Rahang Patah Pada Manusia Menggunakan Perangkat Lunak Solidworks Rakhmad A. Siregar, Rakhmad Arief Siregar; Siahaan, M. Yusuf R.
DINAMIS Vol. 10 No. 2 (2022): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v10i2.10710

Abstract

Penelitian ini dilakukan untuk menganalisis pengujian sambungan prototipe pada rahang patah manusia dengan menggunakan perangkat lunak Solidworks. Tahap awal yang dilakukan yaitu dengan menentukan jenis-jenis sambungan yang dapat digunakan pada prototipe pengganti rahang patah, kemudian dilakukan pemodelan rahang patah, dan tahap akhir yaitu menganalisis kekuatan sambungan rahang patah dengan prototipe pengganti rahang patah menggunakan Solidworks akibat beban statik. Dari hasil analisis pengujian pertama dari ketiga model sambungan rahang patah yang telah dirancang memiliki nilai Von Mises yang berbeda dimana nilai tertinggi diperoleh oleh model chin plate sebesar 838.3 MPa dan hasil pengujian dengan pemberian beban terhadap ketiga model pada pengujian sambungan rahang patah pada manusia menggunakan perangkat lunak Solidworks diperoleh nilai terkecil pada model grid plate sebesar 44.1 MPa
Investigation of Static Flexural Strength of Aluminium Honeycomb Panels with Varying Cell Sizes Siregar, Rakhmad Arief; Yusuf Siahaan, Muhammad Yusuf Rahmansyah Siahaan
DINAMIS Vol. 12 No. 1 (2024): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v12i1.16418

Abstract

In this paper, the static flexural strength of aluminium honeycombs with varying cell sizes were tested experimentally using three-point bending method. Three different cell sizes, namely 2 mm, 4 mm and 6 mm, which were produced in a local workshop in the city of Medan, were used for this study. The main focus is to observe the maximum load and permanent deflection under static loads. The results show that the fracture mode that occurs after reaching the maximum load is core fracture followed by rupture of the adhesive between the core and the skin sheet. It is found that cell size has a significant influence on the maximum flexural strength of honeycomb panels which can be approximated by a regression curve with the results a1 = 0.3475 and a0 = 1.51.
Analisis Karakteristik Bahan Tembaga Akibat Pengaruh Proses Penempaan Terhadap Kekuatan Impak Siahaan, Muhammad Yusuf Rahmansyah; Siregar, Rakhmad Arief; Tanjung, Faisal Amri; Saktiawan, Agung
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.v6i1.13709

Abstract

Indonesia is one of the countries with the largest copper reserves in the world, namely the Tembagapura area, Mimika Regency, Papua Province. The development of electric car technology has a significant impact on increasing the demand for copper. This study conducted material engineering on copper materials with the forging process. The aim of the research was to obtain the average impact energy, average impact strength, and fracture shape of the material from a variety of copper materials. The variation of each test specimen was formed following the ASTM E23 standard with a size specification of 55 mmL x 10 mmW x 8 mmT. The experimental study of impact testing by the charpy method yielded an average impact energy value of 169.081 Joule and 98.058 Joule respectively for copper variations X1 and X2. The average impact strength values produced by the copper variations X1 and X2 are 2.114 J/mm2 and 1.226 J/mm2 respectively. The results of physical observations of the two variations of the copper material show that the material is not broken with fibrous fractures. The data from the test results can be declared that the forging process with hot working has an effect on increasing material characteristics by 58% and copper materials are classified as ductile materials.
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.
Numerical Analysis of Angular Dissimilarity of Static Loads in Honeycomb Structures Substantial Flexural Strength Siahaan, M. Yusuf Rahmansyah; Siregar, Rakhmad Arief; Siregar, Amru; Nasution, Ahmad Yunus
Suara Teknik : Jurnal Ilmiah Vol 14 No 2 (2023): Suara Teknik: Jurnal Ilmiah
Publisher : Fakultas Teknik UM Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29406/stek.v14i2.6337

Abstract

Three-dimensional (3D) imaging technology for computer-assisted construction planning of a product through a simulation process is now having a very positive impact in helping to improve the construction results of a product. The honeycomb shape has better strength in accepting constant and stable loads and has a lighter structure. Aluminum honeycomb using the sandwich construction method was analyzed by simulation using Ansys software in this research based on 3 variations in hexagonal cell geometry due to differences in the applied static load. The influence of the hexagonal honeycomb cell geometry shows a contribution to the deformation capability of the material at varying load angles, namely an increase of 100% at a load angle of 60° and a higher spike of around 130% for a load angle of 90°. Variations in the hexagonal honeycomb geometry still have an impact on increasing material capability. of 128% in the 6 mm hexagonal cell model with a load angle of 90°. The geometric intensity of the honeycomb hexagonal cell produces expansion values respectively in material deformation and equivalent stress based on the load angle of 15% and 35%.
EFFECT OF DIAMETER BEARING MOUNTS TO STRESS CONCENTRATION FACTOR ON TRUCK GEARBOX CASING Siregar, Rakhmad Arief; Siahaan, Muhammad Yusuf Rahmansyah; Rizal, Mahmud
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1702

Abstract

The present study examines the effect of diameter bearing mounts to the stress concentration factor. Three commercial truck gearbox casings were selected for redrawing using CATIA. The gearbox casing is then converted into a FEM model in ANSYS. It has a bore ratio (the ratio of the largest diameter to the smallest diameter of the bearing diameter) of 1.8, 1.5 and 1.4. By applying pressure to the upper gearbox casing for static and dynamic conditions, the total deformation response and equivalent stress are investigated. The deformations and equivalent stresses on the three models of gearbox were determined and discussed. It was found that the bore ratio of the gearbox showed significant differences in results on deformations and equivalent stress. Based on the equivalent stress data of view A, which is the side of the gearbox casing connected to the engine, the stress concentration factor results are consistent with the bore ratio.
Compressive Strength Characteristics of Mortar Composite Materials Influenced by the Fly Ash Mass Composition Ratio Muhammad Yusuf Rahmansyah Siahaan; Siregar, Rakhmad Arief; Faisal Amri Tanjung; Muhammad Nuh Hudawi Pasaribu
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 9 No. 2 (2025): December 2025 Edition
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v9i2.15685

Abstract

The application of science and technology to mortar composite materials creates increasingly better economic value advantages and its development potential has a positive impact on the field of building construction with the implementation of household appliances, coral transplant media, sea walls, roads, curbs, paving blocks, reclaimed land, plant vases, wall ornaments, and acoustic panels. Fly ash material as industrial waste has been categorized as non-B3 waste by the government so that the use of Fly Ash can be optimized to maintain environmental sustainability and become a catalyst for driving the community's economy. This study with a 1: 2 ratio mortar material added with fly ash material to analyze the mechanical properties of the material using experimental testing methods on 3 variations of fly ash material compositions in sequence 10%, 30%, and 50% aims to obtain compressive strength characteristics and mass percentage. The test results provide the highest compressive strength value data on 10% fly ash material of 28.10 MPa while other composition variations tend to show a decrease in the ability of material resilience properties in sequence of 9.36% and 20.32%. The mechanical properties of compressive strength meet the quality requirements of SNI 03-0691-1996 for implementation on paving blocks of type B quality and SNI 2442-2020 for application on concrete curbs. The influence of mass composition provides a positive contribution creating an increasing trend towards the mass percentage where the response of fly ash variations is respectively 20.74% and 14.33%.
Co-Authors Amru Siregar Amru Siregar Darwis Saragih Faisal Amri Tanjung Faisal Amri Tanjung Feberius Gea Felyx Berkat Sihombing Goodman Pakpahan M. Yusuf Rahmansyah Siahaan M. Yusuf Rahmansyah Siahaan Muhammad Nuh Hudawi Pasaribu Muhammad Yusuf R Siahaan Muhammad Yusuf Rahmansyah Siahaan Muhammad Yusuf Rahmansyah Siahaan Nasution, Ahmad Yunus Nasution, Ahmad Yunus Nazaruddin Yusman Parulian Malau Riki Juliansyah Rizal, Mahmud Roni Kosasih Saktiawan, Agung Siahaan, M. Yusuf R. Siahaan, M. Yusuf Rahmansyah Siregar, Doni Alfiah Yusrizha Syahid zulfikar, Achmad Jusuf