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All Journal Rekayasa Mesin Jurnal Rekayasa Mesin JOURNAL OF SCIENCE AND APPLIED ENGINEERING INTEK: Jurnal Penelitian Jurnal Teknik Mesin Indonesia Mekanika: Majalah Ilmiah Mekanika Jurnal Energi dan Teknologi Manufaktur Indonesian Community Journal Eksergi: Jurnal Teknik Energi Journal of Mechanical and Electrical Technology Jurnal Teknologi Jurnal Ilmiah Fakultas Sains dan Teknik Universitas Nusa Cendana SERVIRISMA: Jurnal Pengabdian kepada Masyarakat Jurnal Pengabdian Kepada Masyarakat Ceria Jurnal Pengabdian Kepada Masyarakat Bersinergi Inovatif Jurnal Pengabdian Kepada Masyarakat Mars: Jurnal Teknik Mesin, Industri, Elektro dan Ilmu Komputer Journal of Evrimata: Engineering and Physics
Hilmi Iman Firmansyah
Politeknik Negeri Malang
Aerospace Engineering Agriculture, Biological Sciences & Forestry 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 Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Public Health Social Sciences Other

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Pengaruh fraksi volume terhadap kekuatan tarik hibrid komposit serat pelepah pisang - serat kaca bermatriks epoksi Muhammad Galih; Hilmi Iman Firmansyah
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v20i1.701

Abstract

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%.
Corrosion Rate of Black Chromium Coating Result of Electroplating on Copper Hadi, Syamsul; Valeria, Sza Sya Monica; Adiwidodo, Satworo; Amrullah, Utsman Syah; Takwim, R.N. Akhsanu; Firmansyah, Hilmi Iman
INTEK: Jurnal Penelitian Vol 7 No 2 (2020): October 2020
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v7i2.2681

Abstract

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.
OPTIMASI AERODINAMIKA BODI MOBIL HEMAT ENERGI KEN DEDES ELECTRIC EVO 3 MENGGUNAKAN METODE COMPUTATIONAL FLUID DYNAMICS (CFD) Fakhruddin, Muhammad; Wicaksono, Hangga; Baananto, Fauzan; Firmansyah, Hilmi Iman; Sari, Nurlia Pramita; Muzaki, Mochamad; Akbarsyah D, Khelvindra Rizky; Hardyanto, Noveri Dwi
Eksergi Vol. 17 No. 1 (2021): JANUARI 2021
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (747.999 KB) | DOI: 10.32497/eksergi.v17i1.2219

Abstract

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.
Analisis Penerapan Quality Function Deployment (QFD) sebagai Metode Pengembangan Produk Mesin Perajang Apel untuk Keripik Buah Kurniawan, Yuda Junaedi; Muzaki, Mochamad; Sari, Nurlia Pramita; Firmansyah, Hilmi Iman; Takwim, R.N. Akhsanu
Jurnal Rekayasa Mesin Vol. 19 No. 1 (2024): Volume 19, Nomor 1, April 2024
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v19i1.4670

Abstract

Perajangan merupakan proses paling penting dalam menentukan kualitas produk keripik buah apel yang akan dihasilkan. Sejalan dengan hal tersebut, hasil rajangan sangat bergantung pada kondisi alat perajang maupun keahlian dari penggunanya. Para produsen keripik buah apel di Desa Tulungrejo Kecamatan Bumiaji Kota Batu masih menggunakan alat perajang manual yang mempunyai beberapa kekurangan. Sehingga perlu adanya pengembangan untuk menghasilkan performa mesin perajang yang sesuai dengan kebutuhan produsen tersebut. Penelitian ini bertujuan untuk mengembangkan mesin perajang buah apel sesuai dengan Voice of Customer (VoC) atau kebutuhan dan keinginan produsen keripik buah apel. Metode pengembangan yang digunakan adalah Quality Function Deployment (QFD) dengan alat bantu representatif   berupa matriks House of Quality (HoQ). Di dalam HoQ, customer berharap mesin yang dikembangkan dapat menghasilkan tebal rajangan sesuai standar (3-5 mm) serta memiliki kemampuan yang lebih baik dari alat yang sudah ada disana. Dari hasil concept screening, terpilih konsep dengan kombinasi putaran rpm diatur menggunakan dimmer, ketebalan rajangan diatur dengan baut tekan, tuas pengarah menggunakan pegas tarik dan model mesin tipe horizontal. Mesin ini dirancang mempunyai dimensi minimalis yaitu sebesar 616 x 430 x 430 mm serta dengan komponen yang sederhana sesuai customer requirements pada HoQ. Kapasitas dari mesin ini sebesar 80 kg/jam dengan konsumsi daya listrik sebanyak 150 watt.
PELATIHAN PEMBUATAN SARANA BERMAIN ANAK DI RW 10 KECAMATAN PAKIS KABUPATEN MALANG Sari, Nurlia; Firmansyah, Hilmi Iman; Suwandhy , Nicky; Faizin, Akhmad; Dani, Agus; Jannah, Zahratul
Jurnal Pengabdian Kepada Masyarakat Bersinergi Inovatif Vol. 1 No. 2 (2024): Jurnal Pengabdian Kepada Masyarakat Bersinergi Inovatif
Publisher : PT. Gelora Cipta Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61674/jpkmbi.v1i2.161

Abstract

Lingkungan wilayah RW 10 Kec. Pakis, Kab. Malang merupakan lingkungan yang didalamnya terdapat banyak anak usia prasekolah dan sekolah dasar. Kurangnya sarana yang memadai bagi anak untuk bermain dengan aman dan nyaman di lingkungan setempat menjadi masalah pada lingkungan tersebut. Solusi ditawarkan pada pengabdian ini adalah memberikan sarana bermain anak di lingkungan RW Kecamatan pakis Kab. Malang. Kegiatan Pengabdian ini meliputi : Desain dan pembelian bahan baku, Pelatihan teori pengelasan, pelatihan praktek las, proses pembuatan, dan proses pemasangan. Kegiatan pengabdian ini berjalan dengan lancar.
Pelatihan Mesin Es Krim FOMAC ICR-BQ108 untuk Meningkatkan Kualitas Produk pada UMKM Es Boba Indonesia Hilmi Iman Firmansyah; Fauzan Baananto; Bayu Pranoto; Chandra Gunawan; Sulistyono; Imam Mashudi
Jurnal Pengabdian kepada Masyarakat Vol. 12 No. 2 (2025): JURNAL PENGABDIAN KEPADA MASYARAKAT 2025
Publisher : P3M Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/abdimas.v12i2.6491

Abstract

Es Boba Indonesia, a small and medium enterprise (SME) in Malang, experienced challenges in producing high-quality ice cream due to malfunctions in the FOMAC ICR-BQ108 ice cream machine. The primary issue was that the ice cream melted quickly and did not have the desired soft texture, which negatively affected competitiveness. This community service program aimed to repair the machine through a series of steps, including damage identification, repair, and performance optimization. Post-repair results showed significant improvements in ice cream quality and machine operational efficiency, accompanied by training for the partner to ensure sustainable maintenance.
Inovasi Mesin Penghalus Bumbu Sebagai Solusi Efisiensi Produksi di Warung Makan Watugedhe Singosari Siti Duratun Nasiqiati Rosady; Hilmi Iman Firmansyah Firmansyah; Agus Dwi Putra; Etik Puspitasari; Khambali Khambali; Vinan Viyus
I-Com: Indonesian Community Journal Vol 5 No 4 (2025): I-Com: Indonesian Community Journal (Desember 2025)
Publisher : Fakultas Sains Dan Teknologi, Universitas Raden Rahmat Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/i-com.v5i4.8228

Abstract

Usaha mikro, kecil, dan menengah (UMKM) berperan penting dalam mendukung perekonomian daerah, terutama sektor kuliner yang membutuhkan efisiensi proses produksi. Warung Makan Watugedhe Singosari menghadapi kendala rendahnya efisiensi penghalusan bumbu karena masih menggunakan blender konvensional berkapasitas kecil. Kegiatan pengabdian ini bertujuan meningkatkan produktivitas mitra melalui penerapan mesin penghalus bumbu kapasitas 6 kg/proses. Metode pelaksanaan meliputi survei kebutuhan, perancangan dan pembuatan mesin, implementasi di lokasi mitra, serta pelatihan dan evaluasi hasil. Hasil menunjukkan peningkatan kapasitas produksi hingga 1.100%, efisiensi waktu sebesar 65%, dan penghematan energi listrik 25%. Mitra juga mampu mengoperasikan dan merawat mesin secara mandiri. Penerapan teknologi tepat guna ini terbukti efektif meningkatkan efisiensi, produktivitas, dan kemandirian UMKM kuliner serta berpotensi direplikasi pada usaha sejenis di daerah lain.
Simulation of The Effect of Blank Geometry Toward The Mecanical Properties of Strains And Stress on Deep Drawing Process Using Material Aluminum 7075 Adjie Yoga Pratama; Auzini Widyasari; Muhammad Fakhruddin; Mochamad Muzaki; Hilmi Iman Firmansyah
Journal of Evrímata: Engineering and Physics Vol. 01 No. 02, 2023
Publisher : PT. ELSHAD TECHNOLOGY INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70822/journalofevrmata.vi.27

Abstract

Using Aluminum 7075 at a high temperature of 50 degrees Celsius, this study examines the effect of various blank geometry angles on the mechanical properties of strain and stress during the deep drawing process. This study systematically examines the impact of different blank geometry angles on the deformation behavior, strain distribution, and stress concentration during the deep drawing process of Aluminum 7075 sheet using a numerical simulation approach. To describe the behavior of the material against the effect of the angle on the pressure in the simulation taking into account realistic parameters, the main point is the result of the pressure treatment of the predetermined angle on the results of the strains and stresses created. The obtained results, which include strain distribution, stress concentration, and overall mechanical reaction, provide important information for the choice of the best blank geometry angle in deep drawing of Aluminum 7075 at high temperatures. This research contributes to the advancement of process optimization in the metal forming industry, providing a solid foundation for improving efficiency and quality in deep drawing operations involving high-strength aluminum alloys.
Surface Roughness and Fiber Angular Orientation Analysis Toward Laminated Composite Crack Propagation Hilmi Iman Firmansyah; Bayu Pranoto; Chandra Gunawan; Hangga Wicaksono; Muhammad Fakhruddin
Mekanika: Majalah Ilmiah Mekanika Vol 20, No 1 (2021): MEKANIKA: Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v20i1.48188

Abstract

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 aluminium with the dependent variable response is the bridge crack rate. The manufacture of fiber metal laminates specimens uses the Vacuum Assist Resin Infusion (VARI) method, which uses a vacuum pump as a means to flow the resin from the reservoir to the mold. 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 90,000 in specimens with a surface roughness value of 2.128 µm then decreased cycles on specimens with a value of 2.887 µm, namely 11,000 cycles.
Uji Tarik Komposit Serat Alam (Batang Pisang) dengan Variasi Resin Polimer dan Fraksi Volume sebagai Material Struktur Cladding Bayu Pranoto; Hilmi Iman Firmansyah; Wirawan Wirawan; Sulistyono Sulistyono
Metrotech (Journal of Mechanical and Electrical Technology) Vol 5 No 1: Januari 2026
Publisher : Fakultas Sains dan Teknologi, Universitas Islam Raden Rahmat Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Limbah pohon pisang yang meliputi batang pohon memiliki potensi pemanfaatan yang beragam, diantaranya dapat digunakan menjadi struktur material pada bahan bangunan salah satu diantaranya adalah cladding. Pada penelitian ini dibuat komposit menggunakan serat alam (batang pisang) menggunakan berbagai jenis resin polimer dan diuji kekuatan tariknya yang nantinya akan dibuat menjadi struktur cladding. Cladding merupakan salah satu teknik dalam konstruksi dengan mengaplikasikan material yang berbeda-beda dengan tujuan membuat suatu lapisan. Sampai saat ini material yang biasa digunakan sebagai cladding adalah kayu, vinyl, batu veneer dan logam. Komposit mulai digunakan sebagai bahan alternatif pengganti struktur cladding dengan  memanfaatkan serat alam dalam hal ini adalah batang pohon pisang sebagai bahan alternative pengganti material cladding pada umumnya. Penelitian ini mengevaluasi sifat mekanik komposit serat alam berbahan baku batang pisang dengan matrik resin poliester dan epoxy melalui uji tarik. Komposit dibuat dengan tiga variasi fraksi volume serat yaitu 30%, 50%, dan 70% untuk mengetahui pengaruh kadar serat terhadap kuat tarik komposit. Hasil uji tarik menunjukkan bahwa peningkatan fraksi volume serat berbanding lurus dengan peningkatan tegangan tarik komposit. Pada fraksi volume serat 30%, tegangan tarik maksimum yang diperoleh sebesar 10,3 MPa, sedangkan pada fraksi volume 50% meningkat menjadi 13,9 MPa. Tegangan tarik tertinggi dicapai pada fraksi volume serat 70% dengan nilai sebesar 19,0 MPa.
Co-Authors Adjie Yoga Pratama Akbarsyah D, Khelvindra Rizky Akhmad Faizin Amrullah, Utsman Syah Anindito Purnowidodo Asrori Asrori Auzini Widyasari Bayu Pranoto BAYU PRANOTO Bayu Pranoto Chandra Gunawan Dani, Agus Dio Ovin Wahyu Putrawan Elka Faizal Etik Puspitasari Fauzan Baananto Hangga Wicaksono Hanif Arsalan Dani Subekti Hardyanto, Noveri Dwi Hari Rarindo Imam Mashudi Jannah, Zahratul Khambali Khambali Maskuri Maskuri Mochamad Muzaki Moh. Nasir Hariyanto Muhammad Fakhruddin Muhammad Galih Mukhammad Fakhruddin Mustapa, Mohammad Sukri Nanang Qosim Nicko Nur Rakhmaddian Nike N.F Nurlia Pramita Sari Pratama, Rico Wahyu Putra, Agus Dwi R N Akhsanu Takwim Rehan Wildan Firdauzi Sabina Aisyah Susanto Sari, Nurlia Sari, Nurlia Pramita Satworo Adiwidodo Setyabudi, Sofyan Arief Siti Duratun Nasiqiati Rosady Sulistyono Sulistyono Sulistyono Sulistyono Suwandhy , Nicky Syamsul Hadi Syamsul Ma’arif Valeria, Sza Sya Monica Vinan Viyus Wicaksono, Hangga Wirawan Wirawan Wirawan Wirawan Wirawan Yuda Junaedi