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All Journal Turbo : Jurnal Program Studi Teknik Mesin Eksergi: Jurnal Teknik Energi TEKNOSIA Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Dharmakayana: Journal of scientists, engineers, educators and scientific activists related to society development
Hendri Hestiawan
Universitas Bengkulu
Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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PERBANDINGAN FRAKSI VOLUME KOMPOSIT CARBON TOW/EPOXY ANTARA METODE MANUFAKTUR VACUUM INFUSION DENGAN FILAMENT WINDING Ramadhan, Fahri; Hestiawan, Hendri; FA, A. Sofwan; Purnomo, Herry
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 7 No. 1 (2023): April 2023
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v7i1.30098

Abstract

Several methods can be applied in composite manufacturing, including the vacuum infusion and filament winding methods. In order to apply this method in the manufacture of composites, it is necessary to know which produces composites with a good target ratio of fiber and resin, namely 60%/40%. The aim of this research is to compare the manufacturing methods that produce the distribution of fibers and resins that are close to the target. The composites in this study used a carbon tow reinforcement material with a matrix, namely araldite LY5052 epoxy resin and aradur 5052 CH hardener. In composite manufacturing, there are three stages, namely molding preparation, process manufacturing, and demolding. Then SEM photo observations were made on the specimen pieces from the composite results with three different locations. Of the two methods, vacuum infusion produces SEM photos with denser fiber distribution than filament winding and voids produced in the filament winding manufacturing method. The volume fraction of the test on the vacuum infusion sample with an average yield of 56.79% and 54.01% for filament winding.
ANALISIS KEAUSAN SLIDE SHOE BEARING PADA TRUNNION INLET CEMENT MILL Edy Kristian; Hestiawan, Hendri; Indrizal
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 7 No. 2 (2023): Oktober 2023
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v7i2.34063

Abstract

Slide shoe bearings and trunnion bearings can wear out due to friction and can cause breakdowns that can stop the production rate and cause losses for the company, the reason for researching slide shoe bearings and trunnion bearings is the occurrence of overhaul so that there is damage.The research only focused on slide shoe bearings and trunnion bearings. The working principle of the slide shoe bearing itself is to support the load from the trunnion which rotates continuously, because it always receives frictional loads, it does not rule out the possibility of wear and tear, this is where the damage to the bearing material begins, damage can be in the form of wear or cracks and so on.The cause of wear on the slide shoe bearing is caused by dirt that enters between the slide shoe bearing and the trunnion which only has a gap of 0.11 mm. This is also caused by less regular lubrication.
PENGARUH PERBANDINGAN MASSA TERHADAP SIFAT MEKANIK KOMPOSIT SANDWICH GLASS FIBER POLYURETAN FOAM CORE SEBAGAI MATERIAL UNTUK APLIKASI RUMAH KOMPOSIT TAHAN GEMPA Al Wajdi, Habib Hussein; Hestiawan, Hendri; Rohman, Saeful
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 8 No. 2 (2024): Oktober 2024
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v8i2.35865

Abstract

Composite Houses at the BPPT material technology center and polymer technology center were designated as centers of superior polymer composite science and technology in 2018. For this reason, BPPT designed earthquake-resistant composite houses using lightweight materials so they are easy to carry and fast to install, namely using an easy knock down connection system. disassembled. This earthquake-resistant house uses composite materials, namely Styrofoam or polystyrene foam and glass fiber reinforced plastic (Fiberglass Reinforced Plastics / FRP). This material is stacked like a sandwich so it is called a sandwich composite panel. The weight of this panel is only about 2 kilograms, 30 percent lighter than cement walls reinforced with glass fiber or Fiberglass. The purpose of this study was to analyze the bending strength value of the Fiberglass fiber sandwich composite in the bending test and the results of the bending value of the Fiberglass fiber sandwich composite with the specification of an earthquake resistant composite house (RKTG) and the effect of matrix strength on the fiberglass fiber sandwich composite using polyurethane core with the hand lay-up technique.. It is said to be simple because the technique is very easy to apply, namely liquid resin is smeared over a mold and then the first layer of fiber is placed on top of it, then using a PVC resin spatula it is flattened again. This step is carried out continuously until the desired specimen thickness is obtained. Bending test values with each mass ratio of 1 kg, 1.5 kg, 2 kg, and 2.5 kg. It can be concluded that from the results of this research at a mass ratio of 1.5 kg the results are 2,242 MPa, from the results of this research the Ultimate value Higher Tensile Strength compared to other masses.
KAJI SIFAT MEKANIK PANEL KARBON KOMPOSIT SANDWICH MENGGUNAKAN METODE VACUUM BAGGING PADA PESAWAT PUNA MALE Ziansyah, Vendrio; Hestiawan, Hendri; Roseno, Seto
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 8 No. 1 (2024): April 2024
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v8i1.36549

Abstract

The drone is the result of a collaboration to form a consortium between the Agency for the Assessment and Application of Technology (BPPT), the Ministry of Defence, the Indonesian Air Force, ITB, PT Dirgantara Indonesia, and PT LEN Persero. In this research, an analysis of the mechanical properties of the carbon composite sandwich panel was carried out using the vacuum bagging method to determine the compressive strength of the composite material. The data used was taken from the results of compression tests carried out on 5 specimens using the Universal Testing Machine (UTM) TENSILON RTF-2410. From the tests that have been carried out, the average compressive strength data is 1.924 MPa and the strain value is 4.253 %. Compared to the compressive strength of the PUNA MALE aircraft specifications, which is 0.127 MPa and the average pressure value obtained in the compressive test on the carbon sandwich composite is 1.924 MPa, it can be concluded that the carbon sandwich composite is suitable to be used as a PUNA MALE body material.
PROSES PERLAKUAN PANAS UNTUK MELURUSKAN MATERIAL H- BEAM DENGAN METODE FIRING Ompusunggu, Ferdinand Lincoln; Puspawan, Angky; Hestiawan, Hendri
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 1 (2025): April 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i1.39015

Abstract

Welded beam is a profile obtained by welding 3 sheets of plate consisting of 2 flange plates and 1 web plate formed into an I-Beam or H-Beam profile. The welding process is carried out with a special SAW welding machine and continued with a straightening process because the heat from the welding causes the welded beam profile to bend or twist. Due to the heat during welding, there is a minimum welded beam size and the minimum plate thickness cannot be straightened again during the straightening process because the melting point of the material exceeds the limit during the welding process. Firing is the process of burning material at a certain temperature with the intention of improving the dimensions of the material. The purpose of this study is to straighten H-Beam steel. In carrying out the firing process using tools and materials such as the Huawei CG1-30 machine, chalk stamps, square rulers, nitrogen and gas and K3 equipment, in carrying out the firing process, checks are carried out using a square ruler and determining the burning point on the H-Beam steel, chalk stamps are used to measure the temperature in the firing process. The firing process has The conclusion of this study is that the heat treatment process (firing) can straighten H-Beam steel using the Huawei CG1-30 machine which has a speed of 50-750 mm/minute.
PROSES PRODUKSI AMBENG STOOL HIJAU SAGE BERBAHAN DASAR PLASTIK JENIS HDPE (High-density polyethylene) DI ROBRIES (PT. Siklus Karya Global) M. Daigo Gusnanda; F. Alqap, A. Sofwan; Hestiawan, Hendri
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 1 (2025): April 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i1.39286

Abstract

The manufacturing process is an activity or production process that transforms raw materials into finished goods. To accelerate production, the manufacturing process utilizes modern equipment such as machines and implements structured programs to carry out production. The purpose of this internship is to understand the procedures for making the sage green Hambeng Stool, determine the optimal plastic melting time, and identify the factors influencing product defects at Robries. Raw materials are modified through manufacturing processes to form the necessary components. To produce the desired product, several stages must be followed. In its production, the manufacturing process requires machining stages. The manufacturing process begins with designing the product and determining the material specifications for the product. The methods used in this research include literature review, observation, and interviews. This is because the desired product cannot be produced through a single machining process. The production process at ROBRIES complies with the standard operating procedures (SOP), starting with material selection, material melting, material sanding, and finishing.
Study of Designing Electrical Energy Plants With Feedback Method From Generator Output Samsurizal, Samsurizal; Makkulau, Andi; Fikri, Miftahul; Haidi, Junas; Hestiawan, Hendri
Eksergi Vol. 18 No. 3 (2022): SEPTEMBER 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v18i3.3662

Abstract

The use of electricity has now become a primary need for people who are used for activities as an energy source such as: lights, air conditioners, water pumps, washing machines, TVs, etc. and the longer the need for electrical energy in Indonesia is increasing while power plants are constantly increasing, this forces the government to continue to build power plants to meet the needs of electrical energy in the community. Of course, the construction of this power plant uses very large costs and various obstacles, one of the obstacles is that fuel that used to be a power plant used a lot of oil, now switches to gas and coal to reduce high electricity production costs. The research method that will be carried out is by feeding the generator output back into a rotor drive energy source so that there is a continuous circulation of energy so that the generator output can be charged according to the remaining power capacity fed by the generator. Based on the test results, results were obtained using a 25 Watt DC motor when the input voltage was 12 Volts the power generated on the motor was 13.8 Watts with a motor speed of 768 rpm. Testing on an 800 Watt generator obtained a maximum rpm result of 764 and a vout of 13.8 volts. the highest input voltage (Vin) obtained was 10.06 volts, the output voltage (Vout) was 3.9 volts, and the power produced was 41.34 Watts. The prototype design that was tested produced energy even though the results were still not significant.
PENGARUH FRAKSI VOLUME DAN PEMBEBANAN TERHADAP SIFAT FISIK DAN MEKANIK KOMPOSIT BERPENGUAT SERBUK CANGKANG KERANG LOKAN Hestiawan, Hendri; FA, A. Sofwan; Amri, Khairul; Farid, Muhammad
TURBO [Tulisan Riset Berbasis Online] Vol 13, No 1 (2024): TURBO : Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v13i1.3264

Abstract

The increasing consumption of local clam shells which contain high nutritional value in society has resulted in an increase in waste sea shells in areas around the coast of Bengkulu Province. The high calcium content in lokan clam shells attracts researchers to study the physical and mechanical properties of epoxy resin composites reinforced lokan clam shell powder. This research aims to investigate the effect of variations in the volume fraction of lokan clam shell powder and the mold loading on the physical and mechanical properties of composites reinforced lokan clam shell powder. The process of manufacturing shell powder is carried out by heating at a temperature of 900oC for 6 hours. Variations in the volume fraction of lokan clam shell powder consist of 30, 50, 70%. Meanwhile, the mold loading was varied by 0, 500 N, and 1 kN. The manufacturing process uses hand lay-up techniques. Physical and mechanical tests on composites include water absorption tests, density, tensile tests and impact tests. The results of the research show that the powder volume fraction and mold loading influence the physical and mechanical properties of composites reinforced lokan clam shell powder. The best physical properties of composite were obtained at a powder volume fraction of 70% and a mold loading of 1 kN, namely with a density of 1.43 g/cm3. The best mechanical properties of composite were obtained at a volume fraction of 30% and a mold loading of 1 kN, namely with a tensile strength of 33.2 MPa and an impact toughness of 366.8 kJ/m2.
ANALISIS BEARING PADA OUTPUT SHAFT GEAR REDUCER PUMPING MENGGUNAKAN SIMULASI ANSYS Dwitama, Iksan; Hestiawan, Hendri; Winata, Alben Sindhu
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 2 (2025): Oktober 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i2.40629

Abstract

Bearing is one of the main components in the gear reducer pumping unit that plays an important role in supporting the performance of the output shaft. In working conditions, this component receives high loads that can affect deformation, stress, and bearing life. This study was conducted at PT Bukaka Teknik Utama with the aim of analyzing the total deformation, Von Mises stress, safety factor, and bearing life using Ansys Workbench R1 2024 Student software simulation. The analysis was carried out by creating a bearing geometry design using SolidWorks 2024, determining AISI 52100 material, meshing, giving radial and axial loading, and static analysis simulation. Specific data, such as 32230 SKF bearing specifications and load values, were used to ensure the accuracy of the results. The results of the analysis showed a maximum deformation value of 0.17348 mm, a maximum Von Mises stress of 76.579 MPa, a minimum safety factor of 5.876, and an average bearing life of 1.057 x 1012 hours. From the analysis that has been done, the results obtained are that the bearing life is too large due to the limited mesh size and the small loading given so that the results obtained are inaccurate. The results of the analysis indicate that the bearing is in a safe condition to support the given load. This study recommends improving the quality of meshing in the simulation to obtain more accurate results.
The ANALISIS KEKUATAN CASE FLOW WATER METER DENGAN MATERIAL POLYVINYL CHLORIDE RIGID MENGGUNAKAN SOLIDWORK Wira Guna, Tezar; Hestiawan, Hendri; Hanif Fakhrurroja, Hanif
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 2 (2025): Oktober 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i2.40641

Abstract

The flow water meter case is an additional structure that protects the meter from mechanical damage, corrosion, and other external environmental influences. In its development, the design of the casing used as a protector must consider various aspects, such as ease of installation, and the sustainability of the use of the material. The purpose of this study is to design a flow water meter casing and calculate the distribution of von mises stress, strain, and displacement under axial loading by simulating a flow water meter casing made of rigid polyvinyl chloride (rigid PVC). In the design process, the casing body was designed using Solidwork 2024 software with predetermined dimensions of 67.8 mm in length, 53.38 mm in width, and 58.5 mm in height using an axial loading type of 100 N placed on the casing body with a clamp support type. The results showed that under axial loading, the maximum value of von mises stress was 11.9 MPa, displacement was 0.389 mm, and strain was 0.0018.
Co-Authors Adiansyah, Zeta Afrizal, Yuzuar Agus Nuramal Agus Suandi, Agus Ahmad Faizal Ahmad Fauzan Suryono Al Wajdi, Habib Hussein Alqap, A. Sofwan F Angky Puspawan Bismantolo, Putra Dedi Suryadi DEWI SARTIKA Dwi Kurniawanto Dwitama, Iksan Edy Kristian F. Alqap, A. Sofwan FA, A. Sofwan Fadilah, M. Hafidz Febriyanto, Dwi Fikri, Miftahul Haidi, Junas Hanif Fakhrurroja, Hanif Hasibuan, Zulfahmi Matumona Herry Purnomo Indrizal Jamasri . Khairul Amri Kusmono M. Daigo Gusnanda Makkulau, Andi Maulana Nasution, Ahmad Rizki Muhammad Farid Nurul Iman Supardi Ompusunggu, Ferdinand Lincoln Ramadhan, Fahri Saeful Rohman Samsurizal Samsurizal Saragih, Fernando Desfriandi Seto Roseno Sitinjak, Heryanto Winata, Alben Sindhu Wira Guna, Tezar Ziansyah, Vendrio Zuliantoni, Zuliantoni