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All Journal AUSTENIT Minda Baharu Journal of Informatics, Information System, Software Engineering and Applications (INISTA) Dinasti International Journal of Economics, Finance & Accounting (DIJEFA) JURNAL ILMU PERPUSTAKAN (JIPER) Sublim: Jurnal Pendidikan PEDAMAS (Pengabdian Kepada Masyarakat) Jurnal Ilmu Multidisiplin
Imam Akbar, Imam
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Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Journal : AUSTENIT

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OPTIMALISASI SISTEM VENTILASI MEKANIK UNTUK MENINGKATKAN KENYAMANAN TERMAL DI RUANGAN TERPAPAR PANAS MATAHARI Paramadhony; Setiati, Tri Woro; Turnip, Parngongo; Akbar, Imam; Sampurno, Rachmat Dwi; Rachman, Fadhiil Fuad
AUSTENIT Vol. 17 No. 1 (2025): AUSTENIT: April 2025
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v17i1.10711

Abstract

Climate change has increasingly influenced thermal dynamics in both outdoor and indoor environments, leading to elevated indoor temperatures that can significantly compromise occupant thermal comfort. This comfort is intrinsically linked to psychological well-being, sleep quality, and overall productivity. Indoor thermal conditions are governed by multiple parameters, including internal and external heat gains, building envelope characteristics, and the effectiveness of ventilation systems. In response, the deployment and optimization of mechanical ventilation systems have become essential strategies in architectural and HVAC design to ensure better indoor environmental quality (IEQ). Moreover, energy-efficient mechanical systems are critical for minimizing operational energy consumption and also for mitigating greenhouse gas (GHG) emissions associated with building operations. This study employs Computational Fluid Dynamics (CFD) simulations to analyze the influence of mechanical ventilation placement on indoor temperature distribution, with a specific focus on enclosures with solar-exposed walls. The findings aim to inform design strategies for ventilation layout optimization that enhance thermal comfort while supporting energy-efficient and sustainable building practices. The research findings indicate that the position of the exhaust fan plays a crucial factor in thermal comfort. When it’s placed near to the heat source, it provides higher airflow near to the heat source that helps maintain temperature stability and prevent the spread of heat throughout the room.
MATERIAL SELECTION AND MECHANICAL PROPERTIES IN LEAF SPRING APPLICATION: A REVIEW Utami, Nurhabibah Paramitha Eka; Mahendra, Nanda Yusril; Akbar, Imam; Gunawan, Gunawan; Romli, Romli; Fatoni , Zulkarnain; Pratiwi, Diah Kusuma
AUSTENIT Vol. 14 No. 2 (2022): AUSTENIT: October 2022
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v14i2.4878

Abstract

In the industrial world, leaf springs are an important component of vehicles. Therefore, material selection is very influential in producing good mechanical properties that can affect leaf spring performance. In this review article, the author aims to review and compile articles on relevant previous studies to compare the best alternative materials other than steel that meet the criteria for the application of leaf springs. The review method used in this article is to search for articles that are relevant to the keyword material, leaf springs, and mechanical properties. After that, the author will collect articles and choose articles that have the criteria to be reviewed. Then the articles that meet the criteria will be reviewed by extracting the data to the review table. As a result, 24 articles will be reviewed. Then the author will extract data on each article, namely material, tensile strength, and flexure. Flexural and tensile strength are used as quality criteria for each material. The conclusion of the review article obtained is that carbon/epoxy has the potential as an alternative steel material because carbon/epoxy has the highest tensile strength with a value of 1841MPa, and flexural strength with a value of 1646.7MPa is close to steel as shown in the review table. However, further research is needed, such as proper design and more efficient manufacturing methods to produce innovative leaf spring components with high quality and acceptable quality in the industry.
THE EFFECT OF DIFFERENT STRUCTURE AND GRADIENT INFILL ON MECHANICAL BEHAVIOR POLYLACTIDE ACID MATERIALS (PLA) Akbar, Imam; Hidayat, M Rizky; Rawani, Dewi; Veranika, Rita Maria; Al-Faritzie, Hariman; Romli, Romli
AUSTENIT Vol. 15 No. 1 (2023): AUSTENIT: April 2023
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v15i1.6631

Abstract

The purpose of this study is to analyze the effect of our gradient infill on the mechanical behavior of polylactide acid (PLA) materials resulting from 3d printing, which has an impact on the efficiency of material use while still providing good mechanical support. In this study, the specimens were designed using nTopology software and there were 4 variations of the structure, namely square, honeycomb, diamond, and gyroid, each of which was made gradient and non-gradient, then a bending test was carried out to determine its mechanical behavior thats PLA materials. The results of this study indicate that a comparison between specimens with gradient and non-gradient models with 50% porosity can increase the deflection of the specimen, namely square 15.7-19.1 mm, honeycomb 16.3-20.6 mm, Diamond 19.7-21.8 mm, and gyroid 20.3-22.1 mm, with an average deflection of 2.04 mm. In addition, there is a linear correlation of the relationship between thickness to deflection and flexural modulus whereas the thickness value increases, the deflection and flexural modulus will increase. The conclusion of this research is that giving a gradient to the structure can improve mechanical behavior, especially deflection.
Co-Authors Abdul Latief Arda Ahmad Malik Abdul Aziz Akhmad Herman Yuwono, Akhmad Al Faritzie, Hariman Al-Faritzie, Hariman Alamsyah Amalia Sholehah, Amalia As'ary, Muawwal Al Dewi Rawani Diah Kusuma Pratiwi Fatoni , Zulkarnain Ghiska Ramahdita, Ghiska Gunawan Gunawan Hazriani, Hazriani Hidayat, M Rizky Ibnu Aziz Ismaya Ismaya Ita Sarmita Samad, Ita Sarmita Jabri, Umiyati Mahendra, Nanda Yusril Murisniawati, Dwitia Naharuddin Naharuddin Nofrijon Sofyan, Nofrijon Paramadhony Pare Allo, Karmila Rachman, Fadhiil Fuad Rahmat Rahmat Riki Gana Suyatna Rita Maria Veranika, Rita Maria Romli Romli, Romli Rosmiana, Sri Sampurno, Rachmat Dwi Setiati, Tri Woro Sinta Setiana Siti Nuraeni, Siti SRY WAHYUNI, SRY Syahdan Syahdan, Syahdan Turnip, Parngongo Utami, Nurhabibah Paramitha Eka