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All Journal Traksi : Majalah Ilmiah Teknik Mesin Rotasi JURNAL TEKNIK MESIN Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Rekayasa Mesin Jurnal Rekayasa Mesin Mesin JURNAL CRANKSHAFT Jurnal Material Teknologi Proses: Warta Kemajuan Bidang Material Teknik Teknologi Proses Jurnal Polimesin
Gunawan Dwi Haryadi
Department Of Mechanical Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275
Automotive Engineering Computer Science & IT Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Journal : Rotasi

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The relationship between heel pad compressibility index, age, body mass index and foot area contact in calcanea spur patients Wibowo, Dwi Basuki; Suprihanto, Agus; Haryadi, Gunawan Dwi
ROTASI Vol 22, No 3 (2020): VOLUME 22, NOMOR 3, JULI 2020
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.22.3.188-193

Abstract

This study was performed to investigate the relationship between heel pad compressibility index (HPCI), age, body mass index (BMI) and (FAC) for calcanea/heel spur patients. Thirteen patients with a symptomatic heel spur (3 males and 10 females) participated in this study. The HPCI increased with age and HPCI of the elderly is greater than the adult. The HPCI increased with pain minimum compressive pressure (PMCP) indicated HPCI are all significantly greater in patients with plantar heel pain than in normal subjects. The BMI increased with FAC is caused by BMI and FAC of males is greater than females. The PMCP decreased with BMI indicated that patient with excessive body mass will make experience more pain. The result of pain measurement showed that there are 7 patients who indicated the abnormality (the PMCP value is lower than 2 kg/cm2). From this study, it can be concluded that the quantitatively pain level is worst when PMCP< 2.0 kg/cm2, it is severe when 3.0> PMCP ≥ 2.0 kg/cm2 and it is moderate when PMCP≥3.0 kg/cm2
Perhitungan Lifetime Prediction Pada Komponen Kritis Centrifugal Pump Menggunakan Metode Weibull Haryadi, Gunawan Dwi; Suprihanto, Agus; Butarbutar, Martin
ROTASI Vol 23, No 3 (2021): VOLUME 23, NOMOR 3, JULI 2021
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.23.3.1-8

Abstract

Bencana alam utama yang dihadapi Kota Semarang adalah banjir dengan genangan yang cukup lama. Salah satu upaya mencegah dan mengurangi dampak dari bencana banjir yaitu dengan menggunakan pompa di daerah titik – titik rawan banjir di Kota Semarang. Pompa mengubah energi mekanik dari suatu penggerak menjadi energi potensial berupa head, sehingga fluida cair tersebut berpindah dan memiliki tekanan sesuai dengan head yang dimilikinya. Diperlukan juga maintenance yang tepat untuk memaksimalkan peforma dari Centrifugal Pump. Dengan tujuan memaksialkan peforma, diperlukan sistem perawatan yang tepat untuk meminimalisirkan downtime. Weibull adalah metode yang tepat untuk menentukan yang termasuk bagian kritis dan bagian tidak kritis dan sering digunakan dalam menentukan tingkat kegagalan atau kerusakan dari pola data yang terbentuk. Hasil yang diperoleh dari pengujian dengan menggunakan metode ini terdapat 3 komponen kritis yang sama yaitu pada mechanical seal, bearing, shaft. Nilai MTTF dari mechanical seal, bearing, shaft adalah 194.18 jam, 194.37 jam, 194.24 jam. Nilai keandalan mechanical seal 1, bearing 1, shaft 1 adalah 50%, 47%, dan 47%. Periodic Maintenance yang diperoleh berdasarkan hour meter (HM) dari tiap pompa.Kata kunci: Centrifugal Pump, Komponen Kritis, Weibull, Lifetime Prediction, Reliability.
Pemanfaatan Bubble Flame Untuk Implementasi Proses Brazing Setyoko, Adi Tri; Widyanto, Susilo Adi; Haryadi, Gunawan Dwi
ROTASI Vol 25, No 4 (2023): VOLUME 25, NOMOR 4, OKTOBER 2023
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.25.4.60-67

Abstract

Abstract In the current era of industrialization, welding technology plays a very important role in the manufacturing or metal joining and assembly industry, one of which is brazing. Brazing is the process of joining specimens using metal and filler that melt in the liquid phase, while the base metal used has a melting point above the filler through heat distribution and the use of filler metal. The aim of this research is to investigate the tensile and bending test strength, from the application of the bubling method and to determine the optimal fuel in the brazing process. The connection model in this research is the lap joint type. The results of research on the brazing process using the bubling method obtain a constant temperature output, so that the filler metal can melt evenly. From the bending test and tensile test results data for each specimen using traditional brazing welding and the bubbling method for Pertalite and Pertamax fuels shows varied results. The bending stress experienced a graph of successive decreases, namely 2.92Mpa for Specimen A, 2.92Mpa for Specimen B and 2.57Mpa for Specimen C. However, in contrast to the resulting tensile stress, there was a graph of increase respectively, 20.87Mpa for Specimen A, 21.76Mpa. specimen B and peak with 34.59Mpa for specimen C. Then the optimal fuel which produces optimal combustion in the brazing process using the bubling method is Pertamax.
Co-Authors A.P. Bayu Seno Adhityo Sarwo Nugroho Adibawa, Adham Adhwa Adityo Ristyanto Agus Suprihanto Agus Suprihanto Agus Suprihanto Agus Suprihanto Agus Tri Hardjuno Agus Tri Hardjuno Agus Tri Hardjuno Agy Randhiko Al Azis, Bimasakti Sulthan Amrizal, Abdi Gilang Andrea Tri Wibowo Arijanto Arijanto Arya Erlangga Athanasius Soedira Aulia Rahman Berlin, Rilo Billy Boazter Sebastian Siregar Bintang Satria Hartadi Budi Setiyana Butarbutar, Martin Chrisman Chrisman Deivandra Ginanjar Bhakti Deka Setyawan Diwonsyah, Fadel Muhammad Djarot B Darmadi Djoeli Satrijo Dwi Basuki Wibowo Dwi Basuki Wibowo Ekaputra, I. M. W. Eko Saputra Farhani, Ilham Fakhri Fidrioza Althaf Ferdinand Fitriyana, Deni Fajar Garry Rahadian Muslim Glenn Natanael Samudera Grandy Yustisio Rizaldi Ginting Haira, Mahmuda Hanif, Dimas Naufal Hanifa, Kana Hanny Widura Septriana Harlian Kadir Heru Danarbroto Hocky Adiatmika Huda Fathu Rohman I Made Wicaksana Ekaputra I.M.W EKAPUTRA Ian Wiharja Ian Yulianti, Ian Ignatius Devin Gunawan Ikhsan Aresy Ismoyo Haryanto Ismoyo Haryanto Jericho Jericho Joga Dharma Setiawan Joshua Misael Juan Pratama Anandika Karomi, Dimas Adib Khoiri Rozi Khoiri Rozi Khoiri Rozi Kim Jeon Korna Ariesta Kustomo, Himawan Kristian Kustomo, Himawan Kristian Lie, Calvin M Rafly Rafiqi Matheus Agung Putra Yoga Mhd. Brian Awiruddin Mochammad Ariyanto Mohammad Fauzan Muhammad Ali Yafi Muhammad Fachry Ramadhany Muhammad Fakhri Aji Pratomo Muhammad Zahran Ramadhan Munadi Munadi Norman Iskandar Norman Iskandar Nurul Widiyanto Ojo Kurdi Pratomo, Muhammad Fakhri Aji Purbonugroho, Hanindhieto Dias Andra Purwiantoro, Arman Rafi Ziyad Akbar Rando Tungga Dewa Reihan Rahmadi Rhyienaldi Hardian Dhammaputra Rifky Ismail Rusaily, A. Wildan Sadrach Othniel David Raja Seon Jin Kim Seon Jin Kim Setyoko, Adi Tri Sianipar, Daniel Sri Nugroho Sri Nugroho Stefanus Prasetyo Sulardjaka Sulardjaka Sumar Hadi Suryo Susanto, Alexander Eka Susilo Adi Widyanto Sutopo, Farrel Rico Alifta Utomo, Angelius Fredy Wahyu Eko Purnomo Waruwu, Kezia Gracelynn Wibisono, Yustinus Akas Yonathan Jalu Bagaskara Yusuf Umardani