Article Per Year (5 Year)
p-Index From 2020 - 2025
1.756
P-Index
This Author published in this journals
All Journal Rekayasa Mesin Jurnal Rekayasa Mesin International Journal of Applied Sciences and Smart Technologies Prosiding Seminar Nasional Sains Teknologi dan Inovasi Indonesia (Senastindo) Jurnal Polimesin
I Made Wicaksana Ekaputra
Universitas Sanata Dharma
Automotive Engineering Computer Science & IT Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

Published : 13 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 13 Documents
Search

 1   2 
Pengembangan Wearable Robotic Arm Input dan Virtual Instrument untuk Pengendalian dan Pemantauan Lengan Robot Ekaputra, I Made Wicaksana; Setiawan, Joga Dharma
Jurnal Rekayasa Mesin Vol 8, No 2 (2017)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1041.287 KB) | DOI: 10.21776/ub.jrm.2017.008.02.8

Abstract

This paper investigate the integration of wearable robotic arm input (WRAI) with virtual instrument (VI) for controlling and monitoring the manipulator. The WRAI was designed by following the contours of human arms and equipped with five potentiometers as the sensor. The sensors were placed properly on WRAI by considering the ergonomic aspect. Each sensor on WRAI actuate each joint on the manipulator. The manipulator has five degrees of freedom (DOF) which consists of five revolute joints. For monitoring process, control panel of VI was created suitably by LabVIEW, and its block diagram was mainly programmed by following the forward kinematics approach. The VI obtains the input signal from the rotation of potentiometer on WRAI, and then transmitted to the receiver on manipulator to actuate the joints. By monitoring the control panel, the user can observe each angle joint on manipulator and also the position and orientation of end effector. The test results show the WRAI performs good controllability and ergonomic. The WRAI can control the manipulator easier than using remote control and joystick. Further, the control panel of VI is able to simplify the monitoring process by the friendly user interface.
Pengaruh Komposisi 2.9% dan 3.8% Si terhadap Kekuatan Lelah Besi Cor Kelabu Ekaputra, I Made Wicaksana; Litaay, Arnold A. I.; Setyahandana, Budi
Jurnal Rekayasa Mesin Vol 10, No 3 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.03.3

Abstract

The addition of Silicon (Si) on the gray cast iron can initiate graphite dispersion where the graphite becomes smaller and more evenly distributed. This study investigated the effect of Si concentration of 2.9% and 3.8%  on the fatigue strength of the gray cast iron. The Si was added by the casting process with the open ladle method. The specimens were manufactured by following the ASTM E-466. Several tests such as tensile test, Brinell hardness test, and microstructure observation were conducted prior to the fatigue testing. The results showed that the Si concentration of 3.8% tended to increase the tensile strength up to 1.3%, the hardness up to 7.6%, and fatigue limit up to 10%. Moreover, the fatigue fractured specimen of 3.8% Si showed the combination of type A and type B graphite where graphite is smaller and more evenly distributed. In addition by applying the logistic equation, the fatigue strength can be predicted well.
Prediksi Laju Perambatan Retak Melar pada Baja Austenitik 316L Menggunakan Data Uji Melar dan Metode NSW Ekaputra, I Made Wicaksana
Jurnal Rekayasa Mesin Vol 10, No 2 (2019)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2019.010.02.10

Abstract

In this study, an experimental creep crack growth rate (CCGR) of austenitic steel AISI 316L was predicted from the creep constant values and Nibkin Smith Webster (NSW) method. The experimental CCGR data were obtained from the CCG test under four different load conditions ranging from 6000 to 7000 N at 525 oC. The creep constants, A and n were obtained from the uniaxial creep rupture test under various load conditions, ranging from 180 to 225 Mpa at 525 oC. The creep constants were determined both from the minimum and average creep strain rate data. By applying the creep constants and NSW method, the predicted CCGR curve was generated and compared with the experimental CCGR curve. The result showed that the predicted CCGR curve based on the minimum creep strain rate data was found to be close to the experimental CCGR curve. The significant portion of creep crack growth’s lifetime of austenitic steel AISI 316L was occupied by the crack propagation (steady stage) period rather than crack initiation and/or fracture periods. In addition, plane stress and strain conditions could also be determined from the predicted CCGR curve. It was observed that the experimental CCGR curve was located near the plane strain condition where no deformation occurred in the lateral direction.
The influence of artificial aging on tensile properties of Al 6061-T4 Freddy Saputra Romamti-Ezer Taebenu; Heryoga Winarbawa; Rines Rines; Budi Setyahandana; I Made Wicaksana Ekaputra
International Journal of Applied Sciences and Smart Technologies Volume 04, Issue 01, June 2022
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v4i1.4816

Abstract

This paper presents an explanation related to experimental testing in the form of the tensile properties of Al 6061. Al 6061 was heat treated by the precipitation hardening method. The precipitation hardening consisted of T4 and T6 treatment. Al 6061 samples were heat-treated at a temperature of 430°C for 2 hours, then cooled slowly at room temperature. The T4 was conducted at a temperature of 530°C for 2 hours, followed by rapid cooling in a water medium and natural ageing at a temperature of 70°C for six days. Temperature T6 is the final process of applying precipitation hardening treatment to Al 6061. Temperature T6 is carried out at 530°C for 2 hours, then cooled rapidly in a water medium and continued with artificial ageing at 190°C with a variation of ageing time for 3 hours, 5 hours, and 7 hours. The effect of the applied treatment was observed to increase the maximum strength value of the tensile test of Al 6061.
Karakteristik Lelah Besi Cor Kelabu Terhadap Hasil Penambahan Silisium Melalui Metode Open Ladle Arnold A.I. Litaay; I M.W. Ekaputra
Prosiding Seminar Nasional Sains Teknologi dan Inovasi Indonesia (SENASTINDO) Vol 1 (2019): Prosiding Seminar Nasional Sains Teknologi dan Inovasi Indonesia (Senastindo)
Publisher : Akademi Angkatan Udara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (748.684 KB)

Abstract

Pada penelitian ini, karakteristik lelah besi cor kelabu diteliti pengaruhnya terhadap penambahan 2.9% dan 3.8% silisium (Si). Pengujian lelah dilakukan dengan mengikuti standar ASTM E-466. Spesimen uji lelah yang digunakan berbentuk silinder dengan panjang ukur (gauge length) 48 mm dan diameter sebesar 6 mm. Penentuan beban awal pengujian lelah ditentukan sebesar 80% dari kekuatan tarik besi cor. Dari hasil pengujian diperoleh tren kekuatan lelah yang meningkat seiring dengan meningkatnya kuantitas penambahan Si. Besi cor dengan penambahan 3.8% Si memiliki umur lelah yang lebih tinggi dibandingkan dengan penambahan 2.9% Si. Peningkatan ini terjadi akibat jumlah grafit yang terbentuk akibat peningkatan jumlah Si menjadi semakin kecil ukurannya dan semakin terdistribusi secara merata. Hal ini mengakibatkan besi cor mampu menahan perambatan retak yang terbentuk akibat terhalang oleh penghalang retakan berupa grafit tersebut. Seiring peningkatan kekuatan lelah dan umur lelah, penambahan jumlah Si pada besi cor kelabu juga meningkatkan batas lelah hampir sekitar 10%. Batas lelah untuk besi cor dengan penambahan 3.8% berada pada rasio kekuatan lelah (S) terhadap kekuatan tarik (Su) sebesar 0.55, sedangkan pada penambahan 2.9% berada pada rasio S/Su sebesar 0.50.
ANALISA STRUKTUR DAN PERFORMA IMPELLER POMPA SENTRIFUGAL DENGAN MENGGUNAKAN COMPUTATIONAL FLUID DYNAMIC AND FINITE ELEMENT METHOD Gunawan Dwi Haryadi; Ismoyo Haryanto; I.M.W. Ekaputra; Rando Tungga Dewa; Deka Setyawan
Jurnal Rekayasa Mesin Vol. 13 No. 3 (2022)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v13i3.1199

Abstract

Centrifugal pumps are divided into two main components, namely the impeller and the volute. The impeller is a rotating pump component, while the volute is a stationary pump component. The current problem in the industrial world is that the pump capacity that operates is not in accordance with the written capacity so that the pump does not work optimally. In addition, the structural analysis of the pump is minimally carried out so that damage to the pump often occurs. To overcome this, it is necessary to analyze the performance and structure of the centrifugal pump design using computational fluid dynamics and static structural analysis methods on variations in the number of blades & impeller rotation speed. The results of the CFD analysis obtained are validated using existing product specifications and studies that have been carried out. The maximum value of the resulting von-mises stress is 20,238 Mpa, the maximum value of the resulting strain is 0.00010133, while the maximum total deformation value is 0.051984 mm. The three maximum values ​​occur in the variation of the 7 blade impeller with a rotational speed of 1800 rpm.
INVESTIGASI AREA SERRATED YIELDING PADA PADUAN 800H I Made Wicaksana Ekaputra
Jurnal Rekayasa Mesin Vol. 13 No. 3 (2022)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v13i3.1234

Abstract

Detailed information about the mechanical properties of components in the power plant was crucial in process design. One essential piece of information was the characteristics of the material at various temperatures in a tension load. In this study, the tensile test was applied to the Alloy 800H with various temperatures ranging from 24oC to 900oC at a constant deformation rate of 10-4/s. Alloy 800H was a promising candidate for components in power plants due to its high corrosion resistance in a high-temperature environment. A test was conducted by following the ASTM E8 and ASTM E21. The tensile apparatus was equipped with a furnace, and a thermocouple was attached to the specimen surface of the cylindrical during the test. The data was recorded by the data acquisition connected to the PC. This preliminary study aimed to determine the serrated yielding area that occurred based on several data from tensile test results.
Pengaruh Variasi Temperatur Quenching Dan Media Pendingin Terhadap Tingkat Kekerasan Baja AISI 1045 Haryadi, Gunawan Dwi; Utomo, Angelius Fredy; Ekaputra, I Made Wicaksana
Jurnal Rekayasa Mesin Vol 16, No 2 (2021): Volume 16, Nomor 2, Agustus 2021
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v16i2.2633

Abstract

Baja AISI 1045 merupakan baja yang memiliki kadar karbon sebesar 0,45%. Baja jenis ini banyak digunakan pada komponen kendaraan sepeda motor seperti: roda gigi, poros, dan bantalan. Pada penerapannya, baja sering mengalami keausan akibat dari gesekan dan tekanan. Untuk menjaga agar umur baja lebih tahan lama terhadap gesekan maka perlu dilakukan perlakuan panas quenching. Perlakuan panas quenching ini sangat berperan penting dalam upaya meningkatkan sifat mekanik yang terdapat pada baja AISI 1045. Perlakuan panas quenching yang digunakan pada penelitian ini yaitu 800oC, 850oC, dan 900oC holding time selama 25 menit dengan menggunakan media pendingin air dan oli SAE 20W-50. Hasil beberapa data pengujian selanjutnya diolah dan dibandingkan tingkat kekerasan pada setiap variasi temperatur. Data yang diperoleh dari pengujian kekerasan Vickers (HV) sangat bervariasi. Pada baja AISI 1045 tanpa perlakuan (raw material) didapat nilai rata-rata kekerasan sebesar 202,78 HV. Selanjutnya nilai rata-rata kekerasan dengan media pendingin air pada temperatur 800oC sebesar 398,48 HV, 850oC sebesar 457,02 HV, dan 900oC sebesar 496,42 HV. Berikutnya, nilai rata-rata kekerasan dengan media pendingin oli SAE 20W-50 pada temperatur 800oC sebesar 252,87 HV, 850oC sebesar 402,55 HV, dan 900oC sebesar 476,92 HV. Nilai kekerasan optimal pada baja AISI 1045 terdapat pada suhu 900oC dengan media pendingin jenis air sedangkan nilai kekerasan paling rendah terdapat pada baja tanpa perlakuan (raw material).
CARBON SIZE AND TEMPERATURE EFFECTS TO JIS S45C CARBURIZED STEEL Ekaputra, I Made Wicaksana; Wibisono, Yustinus Akas; Haryadi, Gunawan Dwi
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.v15i1.1499

Abstract

Wear on a metal can be naturally found in components that operate in a friction environment, such as in a transmission system. However, it can be a substantial problem when the wear rate is not within the permitted limit. Surface hardening is a popular way to improve surface wear resistance for metals with various parameters that can be controlled during the process. In this study, pack carburizing was conducted for plain carbon steel JIS S45C. The carburizing process is conducted on the steel by varying the carbon size and temperature during the heating process. The carbon size consisted of mesh sizes of 5 and 15. The heating process was conducted for 2 hours at 800oC and 900oC. The carbon media and catalyst used in this study were coconut charcoal and calcium carbonate (CaCO3). In addition, the hardness Vickers test was conducted to evaluate the surface hardness. It was found that the hardness of Vickers increased with an increase in heating temperature and mesh size of carbon.
INVESTIGASI LAJU REGANGAN CREEP BAJA TAHAN KARAT FERRITIC PADA TEMPERATUR 570 °C Ekaputra, I Made Wicaksana
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1848

Abstract

The probabilistic assessment of failure due to the creep phenomenon must be determined with the minimum deviation. Since the creep failure took years before rupture, laboratory experiments were conducted to represent the failure time. However, the laboratory results are only an empirical approach; therefore, the probabilistic assessment can be deviated. A huge number of variables in creep experiments must be conducted to minimize the deviation. This study investigated the creep strain rate for the 9Cr-1Mo ferritic stainless steel. The lever-arm creep machine was used for the creep rupture test, and the test followed the standard of ASTM E139. The constant loads were applied in the range of 250 – 170 MPa with the homologous temperature of 570 °C. The curve of strain to time was recorded from each constant load condition. The creep strain rate was then calculated and presented in the curve of the creep strain rate to the applied load. The linear regression was drawn from the curve by applying Norton’s equation. By obtaining the creep strain hardening coefficient and exponent, an initial probabilistic assessment of creep failure at a temperature of 570 °C can be predicted.  
Co-Authors Arnold A.I. Litaay Budi Setyahandana Deka Setyawan Freddy Saputra Romamti-Ezer Taebenu Gunawan Dwi Haryadi Heryoga Winarbawa Ismoyo Haryanto Joga Dharma Setiawan Litaay, Arnold A. I. Rando Tungga Dewa Rines Rines Sri Nugroho Sulardjaka Sulardjaka Susanto, Alexander Eka Utomo, Angelius Fredy Wibisono, Yustinus Akas