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INDONESIA
Journal of Engineering and Technological Sciences
Published by Institut Teknologi Bandung
ISSN : 23375779     EISSN : 23385502     DOI : -
Core Subject : Engineering,
Engineering
Journal of Engineering and Technological Sciences welcomes full research articles in the area of Engineering Sciences from the following subject areas: Aerospace Engineering, Biotechnology, Chemical Engineering, Civil Engineering, Electrical Engineering, Engineering Physics, Environmental Engineering, Industrial Engineering, Information Engineering, Mechanical Engineering, Material Science and Engineering, Manufacturing Processes, Microelectronics, Mining Engineering, Petroleum Engineering, and other application of physical, biological, chemical and mathematical sciences in engineering. Authors are invited to submit articles that have not been published previously and are not under consideration elsewhere. Starting from Vol. 35, No. 1, 2003, full articles published are available online at http://journal.itb.ac.id, and indexed by Scopus, Index Copernicus, Google Scholar, DOAJ, GetCITED, NewJour, Open J-Gate, The Elektronische Zeitschriftenbibliothek EZB by University Library of Regensburg, EBSCO Open Science Directory, Ei Compendex, Chemical Abstract Service (CAS) and Zurich Open Repository and Archive Journal Database. Publication History Formerly known as: ITB Journal of Engineering Science (2007 – 2012) Proceedings ITB on Engineering Science (2003 - 2007) Proceedings ITB (1961 - 2002)
Arjuna Subject : -
Articles 14 Documents
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Search results for , issue "Vol. 54 No. 6 (2022)" : 14 Documents clear
The Effect of Cyclic Impact Loads on Rock Properties Ganda Marihot Simangunsong; Yasmine Safitri
Journal of Engineering and Technological Sciences Vol. 54 No. 6 (2022)
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2022.54.6.11

Abstract

This study was conducted mainly in the laboratory to evaluate the effect of cyclic impact loads on rock properties. The test sample was a rock-like material made of cement, sand, and water. The sample was given an impact load from a metal pounder that was dropped at various heights. The load was repeatedly applied to the sample until it was damaged and/or until failure. The test results revealed four stages in the fracturing process, starting with cratering of the upper surface of the sample, formation of initial fractures, fracture development along the sample, and finally sample failure. The test results also revealed that with an increase of impact load, the number of cycles until failure decreases. Furthermore, the value of uniaxial compressive strength and Young’s modulus decreases with increasing number of cyclic loads. The decrease is proportional to the increase of the damage value.
Brine Evaporation Modeling in WAIV System Using Penman, Priestley-Taylor, and Harbeck Models Herry Santoso; Dwiki Eka Putra; Giovanni Angelina; Yansen Hartanto; Judy Retti Bhawaningrum Witono; Kevin Cleary Wanta
Journal of Engineering and Technological Sciences Vol. 54 No. 6 (2022)
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2022.54.6.9

Abstract

Indonesia is a maritime country with a vast ocean area. Indonesia has high potential to produce salt because it has a lot of saltwater resources. When sea salt is harvested, seawater evaporates from a concentration of 3.5°Be to 29°Be. Evaporation can be affected by several factors, such as air temperature, wind speed, water vapor pressure, humidity, radiation, geographical location, time interval, and season. Many modifications have been made to increase the evaporation rate in salt production. One of them is the WAIV (Wind-Aided Intensified eVaporation) method. WAIV evaporation systems utilize sunlight and wind to accelerate the evaporation rate. The modeling in this study was adjusted to the environmental conditions in the case study for which it was necessary to determine new parameter values for the existing models. The Penman, Priestley-Taylor, and Harbeck models were used. The Harbeck model has been studied in previous studies, which were used as a reference in the present study. This study first determined and then validated the parameter values obtained. A simulation of the evaporation rate was conducted in a different place, namely Kupang, East Nusa Tenggara, Indonesia using Meteorology, Climatology, and Geophysical Agency (Indonesian: Badan Meteorologi, Klimatologi, dan Geofisika / BMKG) data.
Study of COVID-19 Health Protocol Standards in Construction Industry of Indonesia Ratih Dewi Shima; Iris Mahani; Krishna Suryanto Pribadi; Kevin Andika Hartono
Journal of Engineering and Technological Sciences Vol. 54 No. 6 (2022)
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2022.54.6.10

Abstract

Due to the increase in GNI per capita, the Indonesian government has launched its national economic recovery program in response to the COVID-19 emergency crisis, known as the New Normal and ordered to partially resume on-hold infrastructure projects followed by the implementation of a new, integrated COVID-19 health protocol. This research presents a study of health protocol standard implementation in the construction industry with the aim of formulating recommendations for minimum criteria elements that can be used for construction services companies at all levels. The domain-taxonomy analysis approach was used as the research method: the ISO/PAS 45005:2020 and ILO standards were adapted to Ministerial Regulation of PUPR No. 10 Year 2020. A gap analysis was conducted with Singapore, Malaysia, and Australia. The analysis generated four segregated main groups of elements with level-2 sub criteria. The main groups of elements were: Planning, Prevention, Handling, and Control and Evaluation. These criteria were validated and implemented in a case study of state-owned construction enterprises, here called PT. X and PT. Y, with large, qualified construction companies. From the implementation analysis it was found that PT. X and PT. Y had implemented the minimum criteria of the COVID-19 health protocol for construction workers very well.
Simulation Study on Hypervelocity Penetration of Lab Scaled Shape Charge Mechanism Khairul H Kamarudin; Ahmad Mujahid Ahmad Zaidi; Ahmad Humaizi Hilmi; Mohamad Faizal Abdullah; Norazman M. Nor; Ariffin Ismail; Mohammed Alias Yusof; S. Rasool Mohideen
Journal of Engineering and Technological Sciences Vol. 54 No. 6 (2022)
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2022.54.6.13

Abstract

Shaped charge (SC) is a mechanism used by defence industries as anti-armored weapon to penetrate armored plates.  Numerous studies have been conducted on the shaped charged effects.  However, experimental studies are limited due to great safety requirement and limited access to high grade explosive.  Due to these limitations, an experimental study on a small-scale shaped charge mechanism (SCM) penetration blast test was conducted against five (5) types of target materials.  The experimental data is then verified by simulation to proof that it can be used to predict the SC penetration data. This paper intent to present a comparative study on the effect of shaped charge blast conducted by simulation with the actual experimental results. In order to conduct this study, a 2D AUTODYN software were used to develop the SC blast model against five (5) types of target materials.  This study concludes that the 2D AUTODYN simulations results can predict the hypervelocity penetration for all target materials compared to the experimental test with an average difference of 9.1 %.

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