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Didit Setyo Pamuji
Institut Teknologi Nasional Yogyakarta
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Kajian Teknologi : Parameter Desain dan Pemodelan Numerik pada Turbin Vortex Berbasis Gravitasi Hafidz Komarul Ikhsan; Rivhan Nugroho; Dendi Gusma; Didit Setyo Pamuji
Retii 2020: Prosiding Seminar Nasional ReTII ke-15
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Gravitational Water Vortex Power Plant (GWVPP) merupakan salah satu jenis teknologi energi terbarukan menggunakan sumber energi air dan dikategorikan sebagai mini-mikrohidro dengan head rendah dimana struktur saluran dan cekungan digunakan untuk membuat pusaran, yang kemudian di ekstraksi melalui runner. Penelitian ini difokuskan pada pengaruh desain basin dan saluran, bentuk sudu, faktor eksternal, dan simulasi numerik water turbine vortvex. Desain basin kerucut lebih efisiensi dibanding dengan basin silinder.Bentuk sudu lengkung lebih efisien dari bentuk sudu datar. Debit air yang masuk ke dalam saluran dapat mempengaruhi kecepatan aliran air. Simulasi numerik digunakan untuk mendapatkan data seperti data eksperimen langsung di lapangan menggunakan Computational Fluid Dynamic (CFD). Diameter outlet yang kecil menghasilkan kecepatan maksimal pada basin berbentuk kerucut.Kata kunci: GWVPP, basin, geometri sudu, CFD
DESAIN UNIT TEKAN UTAMA MESIN PAVING BLOCK OTOMATIS Harry Harry Laksono Nugroho; Didit Setyo Pamuji
Retii 2021: Prosiding Seminar Nasional ReTII ke-16
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

The main press unit is the main part of the paving block printing machine using hydraulic power and a vibrator which is the development of the manual paving block printing machine. Currently, paving block printing machines which are usually carried out by workers manually have begun to be abandoned because the quality produced does not meet the SNI 03-0691-1996 standard and the demand is increasing. The purpose of this Main Press Unit design design is to design a paving block printing machine that can reach K400 quality and the amount of 100 m2 in a day. The main component design of the main press unit for the K400 type paving block printing machine (compressive strength 400 kg/cm2) consists of a middle hydraulic press with a pressure capacity of 10 MPa (compressive force of 12560 N with a bore diameter of 40 mm), two hydraulic side arm drives with 3.5 MPa capacity, two rear hydraulics driving the feeding box with a capacity of 3.5 MPa, main frame, upper mold, lower mold, lower mold vibrating table, upper mold vibrator, feeding box, and side molding drive arm. The total power requirement for all hydraulics is 1.606 kW (2.087 hp), while the total power requirement for the vibrator system is 1.47 kW (1.96 hp). This main press unit machine with a hydraulic pressure of 10 Mpa and with 15 pieces of mold can make paving blocks with K400 quality with a capacity of up to 100 m2 or more per day. The paving block materials used are; fine sand : coarse aggregate : fine aggregate : water plus concrete hardener ie 1/2 : 1 : 1 : 1/4.
Diseminasi Mesin Penyuir Daging bagi UMKM “Mahkota Abon” Dusun Ngebo, Ngaglik, Sleman Sutrisna Sutrisna; Didit Setyo Pamuji; Syah Putra Anggara; Rizky Aji Setiawan
Retii 2022: Prosiding Seminar Nasional ReTII ke-17
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Shredded is a food that is quite popular in the community because of its soft taste and texture and has a long shelf life, so it is very suitable to be used as processed meat products to make it more durable. Making Beef Shredded consists of several stages ranging from boiling, refining fibers or shredding meat, mixing spices, soaking, frying, and draining oil. Mahkota Abon Business Group is a Abon business group located on Jl. Kaliurang Dusun Ngebo Rt. 07, Rw. 23, Sukoharjo, Ngaglik, Sleman, Yogyakarta, which in the process of making the shredded meat is still simple and manual, especially in the roasting process which requires a lot of energy and time. Meat shredding machine has been made and effectively can be operated easily to produce hygienic meat slices. Therefore, through this service, it is hoped that the shredded production capacity of MSME partners will increase both in terms of quantity and quality. The socio-economic impact after this service is carried out is an increase in knowledge about the components, workings, and maintenance of the meat frying machine, so it is hoped that the shredded meat produced by partners will increase in quality and quantity.
Kinerja Dinamis Kendaraan Toyota Avanza Tipe G Tahun 2011 Ferdioan Ardiansyach Putra; Didit Setyo Pamuji; Harianto; Abdulkadir
Retii 2022: Prosiding Seminar Nasional ReTII ke-17
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

This study aims to analyze the dynamic performance of the 2011 Toyota Avanza Type G, which includes engine performance, maximum speed, time required to reach maximum speed, climbability and steering system performance. The analysis is based on empirical equations from the existing literature and vehicle specifications. From the analysis results obtained engine performance characteristics, the maximum speed that can be achieved is 165.6 km / h, the time required to reach a maximum speed of 24.87 seconds, able to climb at a maximum slope angle of 50.99° using 1st gear, able to turn with a turning angle (δi) to 40° without slipping.
Studi Numerik Perbandingan Kinerja dan Medan Aliran Turbin Vortex Gravitasi dengan Tipe Sudu Lengkung Backward dan Forward Pamuji, Didit Setyo; Nugroho, Harry Laksono; Sugati, Daru
Jurnal Rekayasa Mesin Vol 16, No 1 (2021): Volume 16, Nomor 1, April 2021
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v16i1.2057

Abstract

The interaction of turbine blades with vortex flow in micro-hydro power plants based on gravity vortex is still not clearly clarified, therefore numerical simulation is a tool to produce flow visualization that helps analyze the performance of experimental results. This study aims to compare the performance of a gravity vortex flow power generator using a conical basin with a inclined backward and inclined forward blade design using a numerical simulation approach. The simulation begins by validating the results of torque performance and visualizing the flow of experimental research conducted by previous researchers, then the simulation settings are used to compare the performance of the inclined backward and inclined forward blade turbine designs with variations in turbine rotation speed of 80, 120, 160 and 180 rpm. The simulation results show that the curved backward blade performance is better than the forward curved blade which is supported by visualizing the free surface flow and static pressure contours on the blade surface.
Pengaruh Perbedaan Mesh Terstruktur dan Mesh Tidak Terstruktur Pada Simulasi Sistem Pendinginan Mold Injeksi Produk Plastik Angger Bagus Prasetiyo; Fauzun; Azhim Asyratul Azmi; Didit Setyo Pamuji; Rizqi Ilmal Yaqin
Retii Prosiding Seminar Nasional ReTII Ke-14 2019
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Determination of the type of mesh and mesh manufacturing density plays a very important role in a simulation, this is due to minimize the time and computational costs. This study presents a comparison of the influence of mesh on CFD analysis. Mesh is the most important part in doing a simulation. Mesh is good, affects the calculation results of a simulation. To simulate internal flow in injection molding cooling channels to make it more accurate. There are three types of mesh that are applied in a simulation of this study, namely: hexahedral, polyhedral, and tetrahedral mesh are applied to simulate the internal flow of cooling channel injection molding using the k-epsilon turbulence model. Simulation results show that the simulation method using the polyhedral mesh is proposed to be able to speed up calculations and accelerate the convergence of the simulation as evidenced by an iteration graph. The use of polyhedral mesh in CFD simulations is more effective than using tetrahedral or hexahedral mesh. However, the use of hexahedral mesh simulation results is closer to the experiment and requires a long iteration time. In addition, the result is polyhedral mesh requires less computational time than hexahedral mesh and tetrahedral mesh. Using polyhedral mesh in CFD was found to be more effective than using tetrahedral elements.
EFFECT OF ANNEALING ON MICROSTRUCTURE AND HARDNESS OF FeNiCo ALLOYS SYNTHESIZED BY MECHANICAL ALLOYING Sutrisna, Sutrisna; Pamuji, Didit Setyo; Prasetiyo, Angger Bagus; Ababil, Ismail Zulpria; Aziz, Ihwanul
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1690

Abstract

Alloys based on Fe-Ni-Co are categorized as special nickel-based superalloys with braod application as magnetic sensors in electric motors, recording devices as well as for vehicle engine parts. The purpose of this study was to determine the physical and mechanical properties of Fe-Ni-Co materials synthesized by mechanical alloying method, then subjected to annealing temperature variation i.e 800oC, 900oC, and 1000oC for 1 hour. Test methods carried out by XRD-spectra to identify the phase, SEM and EDS mapping to determine the microstructure and composition together with micro hardness test to represent the mechanical properties of this FeNiCo alloys. The results of the XRD test showed that Co atoms and some Fe dissolved into the Ni crystal lattice tended to form a solid solution of g-Ni(Fe,Co). Microstructural observations at 900 OC after milling for 16 hours showed a fine and homogeneous grain structure. The highest hardness value was 421.5 kg/mm2 at 16 hours milling. The Fe-Ni-Co alloy exhibited a homogeneous microstructural distribution with a fine grain structure and high densification.
Pengaruh Variasi Waktu Annealing Terhadap Struktur Mikro dan Sifat Mekanik Baja Paduan Fe-Mn-Al-C Setyo Pamuji, Didit; Sutrisna; Yohanes Agus Jayatun
Retii Vol 18 No 1 (2023): Prosiding Seminar Nasional ReTII ke-18 (Edisi Penelitian)
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

Baja paduan Fe-Mn-Al-C merupakan paduan baru kandidat baja tahan karat austenitik, dimana unsur Al dan Mn menggantikan unsur Cr dan Ni. Setelah dilakukan pengecoran baja paduan Fe-14,8Mn-11,9Al-0,7C ternyata memiliki kekerasan hingga 42 HRC dan susah untuk di machining. Penelitian ini secara spesifik bertujuan untuk menginvestigasi lebih lanjut pengaruh proses spheroidizing annealing pada baja paduan Fe-14,8Mn-11,9Al-0,7C dengan memvariasikan waktu anil untuk meningkatkan kekuatan tarik, stabilitas struktur mikro, dan menurunkan nilai kekerasan. Lembaran ingot dibentuk menjadi beberapa spesimen kemudian dianil pada suhu 1100℃ dengan variasi waktu 45, 60, dan 90 menit. Spesimen dilakukan uji komposisi kimia, analisis struktur mikro, dan sifat mekanik. Pada struktur mikro raw material didapatkan fasa ferit dan austenite, berdasarkan hasil foto struktur mikro pada variasi waktu tidak ditemukan fasa baru dan tidak ada perbedaan yang signifikan, terlihat struktur ferit menjadi lebih besar/semakin memanjang dan struktur austenite yang mengecil. Hasil pengujian kekerasan menggunakan metode Vickers tertinggi di raw material sebesar 463,6 kg/mm² setelah dilakukan proses anil nilai kekerasan menurun namun tidak signifikan, dikarenakan setelah peroses anil diperoleh struktur ferit yang terlihat lebih besar. Hasil pengujian kekuatan Tarik dari raw material sebesar 343,58 MPa dan didapat tegangan tertinggi di variasi waktu 45 menit sebesar 422,18 Mpa, atau meninggakat sebesar 22,8%.
EFFECT OF ANNEALING ON MICROSTRUCTURE AND HARDNESS OF FeNiCo ALLOYS SYNTHESIZED BY MECHANICAL ALLOYING Sutrisna, Sutrisna; Pamuji, Didit Setyo; Prasetiyo, Angger Bagus; Ababil, Ismail Zulpria; Aziz, Ihwanul
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1690

Abstract

Alloys based on Fe-Ni-Co are categorized as special nickel-based superalloys with braod application as magnetic sensors in electric motors, recording devices as well as for vehicle engine parts. The purpose of this study was to determine the physical and mechanical properties of Fe-Ni-Co materials synthesized by mechanical alloying method, then subjected to annealing temperature variation i.e 800oC, 900oC, and 1000oC for 1 hour. Test methods carried out by XRD-spectra to identify the phase, SEM and EDS mapping to determine the microstructure and composition together with micro hardness test to represent the mechanical properties of this FeNiCo alloys. The results of the XRD test showed that Co atoms and some Fe dissolved into the Ni crystal lattice tended to form a solid solution of g-Ni(Fe,Co). Microstructural observations at 900 OC after milling for 16 hours showed a fine and homogeneous grain structure. The highest hardness value was 421.5 kg/mm2 at 16 hours milling. The Fe-Ni-Co alloy exhibited a homogeneous microstructural distribution with a fine grain structure and high densification.
Co-Authors Ababil, Ismail Zulpria Abdulkadir Angger Bagus Prasetiyo Azhim Asyratul Azmi Daru Sugati Dendi Gusma Fauzun Ferdioan Ardiansyach Putra Hafidz Komarul Ikhsan Harianto Harianto Harry Harry Laksono Nugroho Ihwanul Aziz Nugroho, Harry Laksono Rivhan Nugroho Rizky Aji Setiawan Rizqi Ilmal Yaqin Sutrisna Sutrisna Sutrisna Syah Putra Anggara Yohannes Agus Jayatun