Articles
<![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[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]]>
<![CDATA[Pelatihan dan Pemasangan Cermin Tikungan di Baran Genitri Desa Kedungrejo Kecamatan Pakis Kabupaten Malang ]]>
<![CDATA[Nurlia Sari]]>;
<![CDATA[Mochamad Muzaki]]>;
<![CDATA[Sulistyono]]>;
<![CDATA[Nike N.F]]>;
<![CDATA[Muhammad Fakhruddin]]>;
<![CDATA[Hilmi Iman Firmansyah]]>
<![CDATA[ Jurnal Pengabdian Kepada Masyarakat Ceria (JPKMC) Vol. 1 No. 1 (2023): Jurnal Pengabdian Kepada Masyarakat Ceria (JPKMC) ]]>
Publisher : <![CDATA[PT. Gelora Cipta Nusantara ]]>
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DOI: 10.61674/jpkmc.v1i1.12
<![CDATA[Di Baran Genitri Desa Kedungrejo Kecamatan Pakis Kabupaten Malang, terdapat satu jalan utama yang menghubungkan setiap gang. Karena sangat pentingnya peran jalan tersebut sehingga kondisi jalan tersebut harus dapat mengakomodasi kebutuhan masyarakat. Pada daerah tersebut, sering terjadi kecelakaan sehingga terdapat beberapa titik bahaya yang harus ditangani. Kondisi jalan utama yang berbelok belok dan jalan berlubang menyebabkan titik bahaya. Titik tersebut salah satunya tikungan tajam yang terhalang rumput dan lahan tebu serta tembok/pagar rumah warga, sehingga ruas jalan berikutnya setelah tikungan tidak terlihat. Berdasarkan analisis situasi dan permasalahn yang dihadapi, solusi yang timbul yaitu pemasangan cermin tikungan untuk meningkatkan jarak pandang di titik persimpangan/ kelokan pada jalan utama. Metode yang digunakan pada kegiatan pengabdian dimasyarakat ini antara lain (1) Pemetaan kondisi (2) Persiapan (3) Edukasi (4) Pemasangan. Pada program PPM ini akan dihasilkan produk hasil berupa 4 buah cermin tikungan yang dipasang di tikungan jalan utama Baran Genitri selaku mitra. Dengan adanya cermin jalan ini diharapkan dapat menurunkan angka kecelakaan yang terjadi pada kelokan/tikungan tersebut.]]>
<![CDATA[Aerodynamic Study of Chord Length Effect in Low Speed Wind Turbine Using 6 DoF CFD Method ]]>
<![CDATA[Sabina Aisyah Susanto]]>;
<![CDATA[Hangga Wicaksono]]>;
<![CDATA[Hilmi Iman Firmansyah]]>;
<![CDATA[Mukhammad Fakhruddin]]>
<![CDATA[ JOURNAL OF SCIENCE AND APPLIED ENGINEERING Vol 6, No 2 (2023): JSAE ]]>
Publisher : <![CDATA[Widyagama University of Malang ]]>
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DOI: 10.31328/jsae.v6i2.4820
<![CDATA[The dependencies on fossil energy as a basic energy source has many negative impacts, therefore alternative energy is needed to overcome the problem, one of which is the alternative green energy wind turbines. However, wind turbines in Indonesia are difficult to implement because the wind speed in Indonesia is low, which is around 4-8 m/s, therefore it is necessary to do research to improve the ability of wind turbines applied in Indonesia. The analysis method using the 6 DoF CFD method and the experimental carried out using the wind tunnel. The blade used in this study is a custom combination airfoil with the chord lengths of 0.1 m, 0.15 m and 0.2 m. The results shows that, at wind speed of 8 m/s the blade with a chord length of 0.2 m has the greatest pressure of 47 Pa and rotational speed per minute of 76.1 rpm, this variation can be applied to low rpm generators. Whereas blades with a chord length of 0.1 m and a twist angle of 15o have a pressure of 47 Pa, and rotational speed of 97.24 rpm per minute, this variation can be applied to high rpm generators.]]>
<![CDATA[Analisis Pengembangan Produk Mesin Pengiris Keripik Pisang dengan Metode Quality Function Deployment (QFD) ]]>
<![CDATA[Pratama, Rico Wahyu]]>;
<![CDATA[Muzaki, Mochamad]]>;
<![CDATA[Sari, Nurlia Pramita]]>;
<![CDATA[Firmansyah, Hilmi Iman]]>;
<![CDATA[Takwim, R.N. Akhsanu]]>
<![CDATA[ Jurnal Rekayasa Mesin Vol. 19 No. 2 (2024): Volume 19, Nomor 2, Agustus 2024 ]]>
Publisher : <![CDATA[Mechanical Engineering Department - Semarang State Polytechnic ]]>
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DOI: 10.32497/jrm.v19i2.4672
<![CDATA[Wilayah Kabupaten Malang merupakan dataran tinggi yang dikelilingi oleh beberapa gunung pada ketinggian 250-500 meter di atas permukaan air laut. Adapun salah satu produk olahan yang paling populer di daerah tersebut adalah keripik pisang. Pembuatan keripik pisang melaui beberapa tahapan diantaranya pengupasan kulit, pengirisan, penggorengan dan pemberian bumbu. Diantara beberapa tahapan ini proses pegirisan membutuhkan waktu yang cukup lama dibandingkan proses yang lain. Permasalahan yang terjadi pada customer adalah hasil dari irisan kotor karena disebabkan getah dari buah pisang yang menempel pada pisau pengiris, dan kapasitas produksi masih terbatas. Mesin perajang yang pernah digunakan masih kurang aman, kapasitas terbatas dan membutuhkan daya listrik yang cukup tinggi. Sedangkan alat perajang manual yang digunakan saat ini juga mempunyai beberapa kekurangan diantaranya sering melukai tangan, hasil dari ketebalan rajangan tidak konsisten, kurang sempurna dan kapasitas produksi masih terbatas. Sehingga perlu adanya penelitian dengan tujuan untuk mengembangkan mesin pengiris keripik pisang yang sudah ada sesuai dengan kebutuhan produsesn keripik pisang. Penelitian ini bertujuan mengembangkan mesin pengiris keripik pisang dengan metode Quality Function Deployment. Dalam pengaplikasian QFD kebutuhan dan keinginan konsumen atau sering disebut Voice of Customer (VoC) dipetakan dalam alat yang bernama House of Quality (HoQ). Setelah dilakukan interview kemudian pembentukan desain matriks pada model HoQ, ditemukan bahwa produsen keripik buah apel mengingiinkan perajang yang mampu menhasilkan tebal rajangan 1,5 - 3mm dengan kualitas dan performa yang lebih baik dibandingkan alat yang sudah ada. Kemudian hasil benchmarking menunjukkan produk yang dikembangkan memiliki keunggulan yang lebih baik dibandingkan produk yang sudah ada.Setelah dilakukan pengolahan data maka dapat disimpulkan bahwaterpilih konsep dengan kombinasi putaran rpm diatur menggunakan dimmer, ketebalan rajangan diatur dengan baut tekan, tuas pengarah menggunakan pegas tarik dan model mesin tipe vertikal.]]>
<![CDATA[Pengaruh Panjang Serat terhadap Kekuatan Tarik Fiber Metal Laminate Composite ]]>
<![CDATA[Hanif Arsalan Dani Subekti]]>;
<![CDATA[Hilmi Iman Firmansyah]]>
<![CDATA[ Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 2 No. 5 (2024): Oktober: Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer ]]>
Publisher : <![CDATA[Asosiasi Riset Teknik Elektro dan Informatika Indonesia ]]>
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DOI: 10.61132/mars.v2i5.347
<![CDATA[This study aims to evaluate the effect of ramie fiber length on the tensile strength of Fiber Metal Laminate (FML) hybrid composites. The background of this research is the saturation with the use of synthetic composite materials, which encourages the search for renewable materials to replace synthetic fibers. In this study, ramie fibers were immersed in a 6% NaOH solution before use, and the composite manufacturing process was carried out using the hand lay-up method. Annealed Aluminum 1100 was used as the laminating layer. The results of the study showed that the highest tensile strength was obtained in composites with a ramie fiber length of 5 cm, with a tensile strength of approximately 105 MPa. These findings indicate the potential of using ramie fibers as a sustainable and efficient alternative in FML hybrid composite applications.]]>
<![CDATA[Pengaruh fraksi volume terhadap kekuatan tarik hibrid komposit serat pelepah pisang - serat kaca bermatriks epoksi ]]>
<![CDATA[Muhammad Galih]]>;
<![CDATA[Hilmi Iman Firmansyah]]>
<![CDATA[ Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): Jurnal Teknik Mesin Indonesia ]]>
Publisher : <![CDATA[Badan Kerja Sama Teknik Mesin Indonesia ]]>
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DOI: 10.36289/jtmi.v20i1.701
<![CDATA[Banana leaf is a part of the banana that is rarely utilized and even used as waste by the Indonesian people. Inside the banana leaf there are fibers that can be used as a hybrid composite reinforcement material. The choice of glass fiber is because it has good strength value, light weight, and low price. This study has a goal to determine the effect of volume fraction on the tensile strength of hybrid composites of banana leaf fibers and epoxy-matrixed glass fibers. The fibers were soaked in 5% NaOH water. The volume fractions used were 40%, 50%, and 70% fiber. The specimen size standard used is ASTM D638-14 and the composite manufacturing method uses the Hand lay-up method. After conducting the tensile testing process, it was found that the 70% volume fraction had the highest tensile strength value with a stress value of 80.2 MPa and a strain value of 0.07%.]]>
