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<![CDATA[Pengaruh Mechanical Bonding pada Aluminium dengan Serat Karbon terhadap Kekuatan Tarik Fiber Metal Laminates ]]>
<![CDATA[Firmansyah, Hilmi Iman]]>;
<![CDATA[Purnowidodo, Anindito]]>;
<![CDATA[Setyabudi, Sofyan Arief]]>
<![CDATA[ Rekayasa Mesin Vol 9, No 2 (2018) ]]>
Publisher : <![CDATA[Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya ]]>
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DOI: 10.21776/ub.jrm.2018.009.02.9
<![CDATA[Fiber metal laminates (FML) are composite structures fabricated by combining two layers of surface material with the core material. The outer surface of FML used in this composite is Aluminum with Al 1100 type. The FML core material uses carbon fiber. The fabrication process of the composites utilizes vacuum infusion method, in which the resin is infused into the mold with a vacuum condition. Bonds between the core and the surface layers are the variables affecting the strength of FML. In this research, the method used to increase the bonds between layers in FML was a mechanical method, it?s called mechanical bonding. This method involved providing roughness (Ra) on the aluminum surface using sandblasting process to produce different roughness variables, with roughness value of 1,68 ?m; 1,78 ?m; 1,93 ?m; 2,128 ?m and 2,887 ?m. The aim of this study was to examine the effect of aluminum surface roughness to the tensile strength of fiber metal laminates composites. The highest tensile strength of FML was obtained at 2,887 ?m with a value of 367 MPa.]]>
<![CDATA[SIMULASI PENGARUH ORIENTASI SUDUT SERAT TERHADAP TEGANGAN TARIK LAMINATED COMPOSITE ]]>
<![CDATA[Hilmi Iman Firmansyah]]>;
<![CDATA[Sulistyono Sulistyono]]>;
<![CDATA[Hangga Wicaksono]]>
<![CDATA[ Jurnal Energi dan Teknologi Manufaktur Vol 4 No 01 (2021) ]]>
Publisher : <![CDATA[Polinema Press, Politeknik Negeri Malang ]]>
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DOI: 10.33795/jetm.v4i01.75
<![CDATA[Composite is a material consisting of a mixture or combination of two or more materials, either micro or macro, where the properties of the material are different in shape and chemical composition from the original substance. In this study, the composite was tested to determine the tensile strength using simulation. Composite material modeling consists of carbon fiber as reinforcement and epoxy resin as the matrix. Then the composite material was given a uniaxial loading with a loading value of 50 N. By using variations in the orientation of the fiber angle 45ᵒ/90ᵒ/-45ᵒ, 45ᵒ/90ᵒ/-45ᵒ and 60ᵒ/45ᵒ/-60ᵒ. This study aimed to determine the effect of fiber angle orientation on tensile strength, maximum deformation and location of maximum stress on carbon fiber composites. The best composite design is the composite with fiber angle orientation of 45ᵒ/90ᵒ/-45ᵒ with a tensile stress value of 3.6 MPa and the smallest deformation of 0.0644 mm.]]>
<![CDATA[Pengaruh Perlakuan Permukaan Pengikatan Terhadap Sifat Mekanik Komposit Serat Kaca Dengan Laminasi Almunium ]]>
<![CDATA[Muhammad Fakhruddin]]>;
<![CDATA[Maskuri Maskuri]]>;
<![CDATA[Elka Faizal]]>;
<![CDATA[Bayu Pranoto]]>;
<![CDATA[Hangga Wicaksono]]>;
<![CDATA[Hilmi Iman Firmansyah]]>
<![CDATA[ Jurnal Energi dan Teknologi Manufaktur Vol 4 No 02 (2021) ]]>
Publisher : <![CDATA[Polinema Press, Politeknik Negeri Malang ]]>
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DOI: 10.33795/jetm.v4i02.79
<![CDATA[Fiber metal laminates or commonly known as fiber metal laminates (FML) are composite structures made by combining 2 layers of material as the outer layer with the core material. The outer layer of this composite is called the laminate. Generally, laminated composites are produced by joining techniques under solid-state conditions, such as diffusion bonding, extrusion, friction-stir welding, and roller welding. In this study, glass fiber composites with aluminum lamination were made using the vacuum assisted resin infusion (VARI) method, using epoxy resin. The surface treatment of the aluminum laminate was carried out with the direction of roughing at certain angles and variations of the surface roughening of the laminate to test the mechanical bonding between the composite and the laminate. Mechanical bonding testing using three-point bending test method (three-point bending) and buckling test. The expected result is that by surface treatment on aluminum laminate, the best mechanical bonding to composites with glass fiber is obtained. The TKT to be achieved from this research is TKT level 3, which is an analytical study that supports the prediction of the performance of the effect of the bonding surface treatment on the mechanical properties of glass fiber composites with aluminum lamination.]]>
<![CDATA[OPTIMASI AERODINAMIKA BODI MOBIL HEMAT ENERGI KEN DEDES ELECTRIC EVO 3 MENGGUNAKAN METODE COMPUTATIONAL FLUID DYNAMICS (CFD) ]]>
<![CDATA[Muhammad Fakhruddin]]>;
<![CDATA[Hangga Wicaksono]]>;
<![CDATA[Fauzan Baananto]]>;
<![CDATA[Hilmi Iman Firmansyah]]>;
<![CDATA[Nurlia Pramita Sari]]>;
<![CDATA[Mochamad Muzaki]]>;
<![CDATA[Khelvindra Rizky Akbarsyah D]]>;
<![CDATA[Noveri Dwi Hardyanto]]>
<![CDATA[ Eksergi Vol 17, No 1 (2021): JANUARI 2021 ]]>
Publisher : <![CDATA[Politeknik Negeri Semarang ]]>
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DOI: 10.32497/eksergi.v17i1.2219
<![CDATA[Aerodynamics is a branch of science that discusses the movement of an object in the air. Aerodynamics comes from the words aero = air and dynamics = force of motion. The study of air forces is a branch of fluid mechanics. This study is a continuation of the study of hydrodynamics, where the science of the motion of air has a close relationship with other sciences. Physics, mathematics, mechanics, meteorology and others are branches of science that are closely related to aerodynamics. Where in the science of aerodynamics, it discusses the principle of stationary air, specifically about the changes experienced by the air when there is a change in geometry. In this study, CFD analysis was carried out to inspect and optimize the airflow through the energy-efficient car body "Ken dedes Evo 3" Malang State Polytechnic to participate in energy-efficient car competitions by following the regulations and packaging requirements in energy-efficient car contests. The aerodynamic analysis of the energy-efficient car was carried out using the ANSYS simulation software. This aerodynamic research aims to reduce the drag coefficient and lift coefficient of energy-efficient cars. In the end, the energy-efficient car Ken Dedes Electric Evo 3 has an improved drag coefficient of 0.03 and a lift coefficient of 0.034. This is obtained from the simulation only on the car body.]]>
<![CDATA[Corrosion Rate of Black Chromium Coating Result of Electroplating on Copper ]]>
<![CDATA[Syamsul Hadi]]>;
<![CDATA[Sza Sya Monica Valeria]]>;
<![CDATA[Satworo Adiwidodo]]>;
<![CDATA[Utsman Syah Amrullah]]>;
<![CDATA[R.N. Akhsanu Takwim]]>;
<![CDATA[Hilmi Iman Firmansyah]]>
<![CDATA[ INTEK: Jurnal Penelitian Vol 7, No 2 (2020): October 2020 ]]>
Publisher : <![CDATA[Politeknik Negeri Ujung Pandang ]]>
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DOI: 10.31963/intek.v7i2.2681
<![CDATA[The problem faced is that the white chromium coating has a low selling value or aesthetic value than the black chromium layer which is more in demand, especially by the younger generation who prioritizes aesthetics. The purpose of the corrosion test was to determine the corrosion resistance ability of the black chromium coating resulting from the electroplating process on the relationship between the solution temperature and the immersion time of copper in a corrosive solution. Corrosion test methods include literature studies, field observations, weighing specimens, immersing specimens in corrosive solutions, weighing specimens, calculating corrosion rates, and data analyzing. Corrosion test results show that the higher the temperature of the solution and the longer the immersion time, the smaller the corrosion rate for the lowest conditions at 30oC and a duration of 5 minutes with a corrosion rate of 0.2004 mm/year and the highest conditions at a temperature of 50oC and a duration of 9 minutes at a rate of corrosion of 0.0108 mm/year.]]>
<![CDATA[Design And Control System of Automatic Control System of Coal Flow on Belt Conveyor Installation ]]>
<![CDATA[Bayu Pranoto]]>;
<![CDATA[Chandra Gunawan]]>;
<![CDATA[Hilmi Iman Firmansyah]]>;
<![CDATA[Hangga Wicaksono]]>;
<![CDATA[Andhika Angger Nugraha]]>;
<![CDATA[Muhammad Trifiananto]]>
<![CDATA[ Mekanika: Majalah Ilmiah Mekanika Vol 20, No 2 (2021): MEKANIKA: Majalah Ilmiah Mekanika ]]>
Publisher : <![CDATA[Universitas Sebelas Maret ]]>
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DOI: 10.20961/mekanika.v20i2.51986
<![CDATA[In a power plant unit whose main fuel is coal, there is generally use a belt conveyor installation. This conveyor belt serves to supply coal from the crusher unit to the combustion chamber of the power generation unit. In this study, we discuss a case where the installation of a belt conveyor which was initially only one line was then made a new branch that supplies coal to other power generating units. Equitable capacity distribution and continuity of coal distribution are the main focus of this study. Therefore, a design of automatic control system of coal flow divider on belt conveyor installation was designed. The working principle of this coal flow splitting system is to control the movement of the straight blade plough that directs the flow of coal to each unit at the certain time and continuously. Straight blade plough in the form of steel metal plate with a thickness of about 10 millimeters in which one end is connected to the end of the pneumatic cylinder. Automatic control system of coal flow divider in belt conveyor installation designed using CX-Programmer and CX-Designer applications. CX-Programmer serves to create automatic control logic concepts. While the CX-designer functions to create a Human Machine Interface (HMI), making it easier for operators to control the course of the coal supply process. The results of this study are in the form of control logic lines that can be applied to Programmable Logic Control (PLC) device and Human Machine Interface (HMI) equipment.]]>
<![CDATA[Lunch Box Innovation Product Design In The Millennial Era ]]>
<![CDATA[Bayu Pranoto]]>;
<![CDATA[Hilmi Iman Firmansyah]]>;
<![CDATA[Hangga Wicaksono]]>;
<![CDATA[Muhammad Fakhruddin]]>;
<![CDATA[Rilis Eka Perkasa]]>
<![CDATA[ Mekanika: Majalah Ilmiah Mekanika Vol 20, No 2 (2021): MEKANIKA: Majalah Ilmiah Mekanika ]]>
Publisher : <![CDATA[Universitas Sebelas Maret ]]>
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DOI: 10.20961/mekanika.v20i2.52100
<![CDATA[Almost of kids in the world still bring a lunch box and a bottle of water in their bag when their go to school. His mother always prepares a lunch box complete with a bottle of drinking water, hoping that his son can enjoy his favorite lunch and avoid starvation. Sometimes the mother is very worried when the lunch box has been brought by the child but the water bottle is left behind. Then the mother was willing to take her child's water bottle to her school. This is certainly not expected by either the mother or the child. As a form of concern for the author to this problem, the author proposes a lunch box design with a lunch box lid that also functions as a drinking water bottle. The idea of this design proposal is ones grab, both are food & drink in your hand. The goal is how to make a kids can grab their food and drink easily and practice. So it is proposed to modify a top cover of common foodpack to become a drink bag. The design process begins with analyzing market needs, making sketches, creating 3D design models using the Autodesk Inventor CAD application, material selection, and product evaluation.]]>
<![CDATA[Surface Roughness and Fiber Angular Orientation Analysis Toward Laminated Composite Crack Propagation ]]>
<![CDATA[Hilmi Iman Firmansyah]]>;
<![CDATA[Bayu Pranoto]]>;
<![CDATA[Chandra Gunawan]]>;
<![CDATA[Hangga Wicaksono]]>;
<![CDATA[Muhammad Fakhruddin]]>
<![CDATA[ Mekanika: Majalah Ilmiah Mekanika Vol 20, No 1 (2021): MEKANIKA: Majalah Ilmiah Mekanika ]]>
Publisher : <![CDATA[Universitas Sebelas Maret ]]>
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DOI: 10.20961/mekanika.v20i1.48188
<![CDATA[Composite is a material that consisting of two or more materials, either micro or macro, where the properties of the material differ in shape and chemical composition from the original substance. In this study, fatigue testing of fiber metal composites was carried out to determine the rate of crack propagation so that the age of the fiber metal composite specimen was known. The independent variable in this research is the angular orientation of the carbon fiber and the surface roughness of the aluminum with the dependent variable response is the bridge crack rate. The manufacture of fiber metal laminates specimens uses the Vacuum Resin Infuse (VARI) method, which uses a vacuum pump as a means to flow the resin from the reservoir to the mold. This method is used to minimize the occurrence of air bubbles trapped on the specimen which causes porosity defects which will reduce the strength of the metal laminates specimen itself. Fatigue testing is performed using the stress amplitude method. That is, the value of the load when the tensile test is one third of the tensile strength. After the fatigue test was carried out, the results were obtained on specimens with an angular orientation of 0/90 ° fibers, the crack propagation rate slowed down with a cycle value of 90000 in specimens with a surface roughness value of 2.128 µm then decreased cycles on specimens with a value of 2.887 µm, namely 11000 cycles.]]>
<![CDATA[Pengaruh Fraksi Volume Terhadap Sifat Mekanis Komposit Forged Fiberglass Metode Compression Mould ]]>
<![CDATA[Muhammad Fakhruddin]]>;
<![CDATA[Imam Mashudi]]>;
<![CDATA[Mochamad Muzaki]]>;
<![CDATA[Hilmi Iman Firmansyah]]>;
<![CDATA[Bayu Pranoto]]>;
<![CDATA[Hangga Wicaksono]]>
<![CDATA[ Jurnal Energi dan Teknologi Manufaktur Vol 5 No 02 (2022) ]]>
Publisher : <![CDATA[Polinema Press, Politeknik Negeri Malang ]]>
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DOI: 10.33795/jetm.v5i02.134
<![CDATA[Fiber-reinforced composites can be classified into two parts, namely short fiber composites and long fiber composites. Long fibers are stronger than short fibers. Long fiber (continuous fiber) is more efficient in laying than short fiber but short fiber is easier to lay than long fiber. Fiber length affects the processability of the fiber composite. Judging from the theory, long fibers can continue the load and stress from the stress point to the other fiber. In this study, the volume of chopped glass fiber composite with random matrix direction was varied with respect to polyester resin. Making forged fiberglass composites with the press mold method to minimize the occurrence of air bubbles during the composite molding process. Testing the mechanical properties of the forged fiberglass composite using the three-point bending and tensile testing methods. The expected result is the variation of the volume fraction of random chopped glass fiber to polyester resin. The TKT to be achieved from this research is TKT level 3, which is an analytical study that supports the prediction of the performance of the effect of the volume fraction between glass fiber and resin on the mechanical properties of the tensile and bending strength of forged glass fiber composites]]>
<![CDATA[Analysis of Fiber Metal Composite Shear Strength Using Independent Variables of Fiber Angle Orientation and Metal Surface Roughness ]]>
<![CDATA[Hilmi Iman Firmansyah]]>;
<![CDATA[wirawan wirawan]]>;
<![CDATA[Moh Nasir Hariyanto]]>
<![CDATA[ Jurnal Energi dan Teknologi Manufaktur Vol 5 No 02 (2022) ]]>
Publisher : <![CDATA[Polinema Press, Politeknik Negeri Malang ]]>
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DOI: 10.33795/jetm.v5i02.136
<![CDATA[Fiber Metal Laminates (FML) is a classification of metallic materials consisting of several thin layers of metal combined with composite materials. The constraint of FML is the weak bond between the layer material and the core composite. The weak bond between the layer material and the core composite can be influenced by several things, including the absence of an interlock system between the layer material and the core composite so that the strength of the FML composite decreases. In this study, a study was conducted on the shear strength of FML composites using the independent variables of surface roughness and fiber angle orientation. The highest shear strength in FML composite with fiber angle orientation of 45/45° and with a surface roughness value of 2.128 m with a shear strength value of 2.7 MPa]]>
