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Logic : Jurnal Rancang Bangun Dan Teknologi
Published by Politeknik Negeri Bali
ISSN : 1412114X     EISSN : 25805649     DOI : https://doi.org/10.31940/logic.v21i3
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Logic : Jurnal Rancang Bangun dan Teknologi is a peer-reviewed research journal published by Unit Publikasi Ilmiah, Pusat Penelitian dan Pengabdian Masyarakat, Politeknik Negeri Bali, aiming at promoting and publishing original high quality research in all disciplines of engineering and applied technology. All research articles submitted to Logic should be original in nature, never previously published in any journal or presented in a conference or undergoing such process across the world. All the submissions will be peer-reviewed by the panel of experts associated with particular field. Submitted papers should meet the internationally accepted criteria and manuscripts should follow the style of the journal for the purpose of both reviewing and editing.
Arjuna Subject : Teknik (semua kategori) - Tenik Industri dan Manufaktur
Articles 132 Documents
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The Impact of Pipe Ø 0,5 Heater Length and Temperature on Ovality and The Difference in Pipe Thickness for Its Bending Musholli Musholli; Sudarmaji Sudarmaji
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 23 No. 2 (2023): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v23i2.131-137

Abstract

Abstract, Ferrous metal is of material utilized mostly for many objects or kinds of stuff to help humans and their work easier. Low-carbon steel is one of the ferrous metal natures that could be utilized when transforms into more useful objects. There be cold as well as hot working to undertake. Molting by bending pipe includes cold working due to it being bent as its recrystallization temperature is lower. When the process is undertaken, the pipe dimension would be oval which needs to be examined by enumerating a lower-recrystallization temperature and whether or not to shrink the pipe ovality percentage. In addition, as the pipe is bent there would be changes in the pipe dimension because it would drives pulls as well as puts pressure on one of the cross-sectional areas so the pipe percentage of dimension/thickness changes should also be examined. Methods to apply are a series of experiments by firstly treating heating which is up to 650o C and bending pipe as its temperature goes lower between 410o C – 500o C. These two types of independent variables that differ only in their cross-sectional areas of heating also resulted in impacting on both ovality percentage and the pipe thickness of its cross-sectional area.
Analysis of the Selection and Installation of a Pump for an Overflow Swimming Pool with a Volume of 67 Cubic Meters Achmad Wibolo; I Ketut Suherman; I Dewa Made Pancarana; I Ketut Adi
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 23 No. 2 (2023): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v23i2.138-146

Abstract

In the swimming pool there is a pump system that is useful for circulating water. Pumps  in  swimming pools can affect water quality. Dirty  water will be cleaned by the  filter  and  will  be re-circulated to the swimming pool. The calculations  that  must  be  known  are  the  volume  of  the swimming  pool,  pump  power, flow rate, and the curve of  the pump. In  order  for  the  selection of a swimming  pool pump  to be  appropriate, the  correct  calculation  must  be made  so that the pump  can provide  the best  performance for a swimming pool with a volume of 67 cubic meters  and is able to circulate swimming pool water 4 times  during 12 working hours.
The Effect of Holding Pressure and Inject Pressure to Short Shot Defect in Injection Molding Cover Pot: Pengaruh Holding Pressure dan Inject Pressure Terhadap Short Shot Defect pada Proses Injection Molding Cover Pot Muhammad Sambodo Aribowo; Agus Dani
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 23 No. 2 (2023): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v23i2.147-154

Abstract

The influence of inappropriate injection molding parameters often results in product defects, one of which is the short shot, which is a condition where the plastic to be injected into the cavity does’t reach the ideal capacity. The purpose of this research is to understand and be able to explain the parameters of holding pressure, inject pressure, and the interaction of these two parameters on short shot defects in cover pot products with the injection molding process. This research uses independent variables, namely holding pressure with variations of 20 Bar, 30 Bar, and 40 Bar and inject pressure with variations of 15 Bar, 30 Bar, and 45 Bar and dependent variables in the form of short shot defects. The method used in this research is a factorial experiment with replication of 10 (ten) times and data processing analysis using ANOVA with the help of Minitab 21.2.0 statistical software. The result of this research is that there is a significant influence of holding pressure, inject pressure, and the interaction of these two parameters on short shot defects in cover pot products with injection molding process. The average weight of the product produced at the interaction of the parameters holding pressure 40 Bar and inject pressure 45 Bar is 8.8 grams (normal) so as to minimize product defects to improve the quality and quantity of cosmetic packaging production cover pot.
DESIGN & IMPLEMENTATION OF MPPT SOLAR PHOTOVOLTAIC - ELECTRIC VEHICLES IN FAST VARYING PARTIAL SHADING CONDITIONS USING SERVAL OPTIMIZATION ALGORITHM Saputra, Hendry; Isdawimah; Belyamin
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 24 No. 2 (2024): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v24i2.49-62

Abstract

Solar panels are used to convert solar energy into electrical energy. In this study it was applied to electric vehicles which have a very large potential for being constrained by shadows. In fast varying partial shading conditions, the position of the maximum power point is divided into two, namely GMPP and LMPP. This condition makes the MPPT process stuck in LMPP. Therefore, this research proposes the application of Serval Optimization Algorithm (SOA) in MPPT. This method refers to the natural behavior of the serval in nature. The fundamental inspiration of SOA is the serval hunting strategy in two stages of exploration and exploitation. The SOA is implemented in MPPT to change (duty cycle) so that it gets the best value and produces maximum solar panel output power. This SOA method was chosen to complete the partial shading conditions so that MPPT can optimally reach GMPP without going through LMPP. The solar panels used in this system are 2  units with specifications of 25 Wp with a 24V battery load and a 120W BLDC Motor compact in Electric Vehicle - Two Wheeler Scooter. MPPT SOA was tested in a simulation using PSIM and actual Software in 6 variations of normal and partial shading conditions. In the Simulation Test of Partial Shading Conditions, an average accuracy of 99.958% and an average tracking time of 0.492 seconds were obtained. SOA has a higher accuracy than PSO and GWO, which is 99.95%. And it has a faster tracking time of 0.55 seconds. In the SOC Integration Test, the SOA Method obtained an error value of 6.48% better than the GWO Method. On the Road Test with 6 condition, it can slow down the value of the decrease in battery capacity by 16.24%. The application of Single Source on the PV-MPPT-Converter can be implemented with an efficiency value of 76.86%. In previous research where SOA is a new method in Optimizing Problem Solving which has quite good accuracy performance, and in this research it can be implemented in Solar PV Optimization to track MPPT electric vehicles with varied and fluctuating partial shading conditions.
EFFECT OF STATIC THERMAL TENSIONING AND PREHEATING ON ANGULAR DISTORTION IN FCAW WELDED SS400 STEEL CORNER JOINTS Susilo, Sugeng Hadi; yudiyanto, eko; Setiawan, Agus; Khambali, Khambali; Suryanto; Alauddin, Falih
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 24 No. 2 (2024): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v24i2.39-48

Abstract

FCAW welding is an automated welding process that employs a wire roll electrode to melt metal, using flux or powder within the electrode's core for protection. A common issue with FCAW welding is the occurrence of angular distortion and alterations in the length and width dimensions, particularly in thin plate iron materials, due to residual stresses from the welding process. This research aims to assess the impact of static thermal tensioning, preheating, and their combination on angular distortion in SS400 steel corner joints during FCAW welding, considering heat input during welding. True experimental research methodology was employed, with variations in preheating temperatures of 200°C, 250°C, 300°C, static thermal tensioning at 150°C, 200°C, 250°C, transient thermal tensioning at 150°C, 200°C, 250°C, and a reference method with no treatment to determine the welding approach that minimizes angular distortion. The material used was 3mm thick SS400 steel. Data analysis was performed using Minitab 18 software and the One-Way Anova method. The research results indicate a significant influence of static thermal tensioning, preheating, and their combination on angular distortion. The optimal welding methods identified are preheating-static thermal tensioning at 89°55', preheating-transient thermal tensioning at 89°50', static thermal tensioning at 150°C at 89°45', transient thermal tensioning at 150°C at 89°40', and preheating at 200°C at 89°35'.
EXPERIMENTAL STUDY OF THE UTILIZATION OF PINEAPPLE LEAF FIBER WITH THE ADDITION OF EPOXY RESIN TO THE TENSILE STRENGTH BREAK OF THE CONCRETE Nisumanti, Sartika; Hasanah, Miftahul; Febryandi
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 24 No. 2 (2024): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v24i2.63-68

Abstract

In its development, many new concrete modifications were found, such as lightweight concrete, fiber concrete, polymer concrete, high-strength concrete and ultra-high-strength concrete. Epoxy resin can accelerate the hardening process of concrete because epoxy itself generates heat so that it helps accelerate hardening. In previous studies, the addition of areca nut shell fiber and 0.8% epoxy resin can increase the split tensile strength of concrete. Based on the description above, it is necessary to conduct research on the split tensile strength of concrete that combines a mixture of pineapple leaf fiber and epoxy resin. So this research uses pineapple leaf fiber and epoxy resin. Pineapple leaf fiber and epoxy resin are expected to be strength-enhancing materials that can produce concrete with more optimal split tensile strength.  The purpose of this study was to determine the effect of the addition of epoxy resin and the percentage variation of pineapple leaf fiber on the split tensile strength of concrete and its comparison with normal concrete and to determine the percentage level of the addition of the most optimum pineapple leaf fiber to produce the maximum concrete split tensile strength test value among the planned variations. The method used in this research is experimental. From the results of the average split tensile strength test at 28 days, the epoxy resin variation of 0.8% achieved a strength of 2.87 MPa, the 0.15% variation achieved 2.37 MPa, and the 0.5% variation achieved 2.47 MPa
SIMULATION OF THE INFLUENCE OF FIBER VOLUME FRACTION AND FIBER ORIENTATION ON THE STRENGTH OF POLYESTER COMPOSITE REINFORCED WITH GLASS FIBER IN BENDING STRENGTH Fakhruddin, Muhammad; Mashudi, Imam; Pramita Sari, Nurlia; Widhi Supriyanto, Nicky Suwandhy
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 24 No. 2 (2024): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v24i2.79-86

Abstract

Fiber-reinforced composites can be classified into two parts, namely short fiber composites and long fiber composites. Long fibers are generally stronger than short fibers. Long fiber (continuous fiber) is more efficient in laying than short fiber but short fiber is easier to lay than long fiber. Fiber length affects the processability of the fiber composite. Judging from the theory, long fibers can transfer the load and stress from the stress point to the other fiber. In this research, we simulated the effects of volume fraction and fiber orientation in glass fiber-reinforced polyester composites on bending strength to examine the effect of each parameter on the mechanical properties of glass fiber composites. The mechanical properties of the composite were tested using the three-point bending and tensile testing methods. The study expects to find variations in mechanical properties with changes in the glass fiber volume fraction and fiber orientation. In this study, it is planned to function in a relevant environment, the components in this study must be able to operate properly and have been well integrated with prototype manufacturing that has been tested as a test tool function. Notably, the pinnacle of the bending test, measuring 170.41 MPa, was achieved at the specific combination of a 0.5 Fiber Volume Fraction and the 0-90o fiber orientation.
COMPARATIVE ANALYSIS OF BILL OF QUANTITY STRUCTURE GEDUNG LAYANAN TERPADU RSUD BANGKINANG CITY USING CONVENTIONAL METHOD AND TEKLA STRUCTURE APPLICATION Bayu Baskoro; Zainuri; Shanti Wahyuni Megasari
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 24 No. 2 (2024): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v24i2.69-78

Abstract

In accordance with PUPR Ministerial Regulation No. 22 of 2018, the use of Building Information Modeling (BIM) must be applied to non simple state buildings with criteria for a building area of more than 2000 m2 and more than 2 floors. Gedung Layanan Terpadu RSUD Kota Bangkinang has an area of 5,040 m2 and has 4 floors but the calculations still use conventional methods. The aim of this study was to analyze the comparison of the bill of quantity (BOQ) of the Gedung Layanan Terpadu RSUD Bangkinang City using conventional methods and the Tekla Structure application. The integrated services building consists of 4 floors, starting from the basement floor, 1st floor, 2nd floor, 3rd floor and roof floor. The research method used was to carry out manual calculations using Microsoft Excel based on the working plans and modeling the building structure using the Tekla Structure application. From the results of the study it can be concluded that the volume of concrete using the conventional method was 3,193.5 m3 while the calculation using the Tekla Structure application was obtained 3,175.5 m3 where there was a difference of 18 m3 or in a percentage of 0,56 % less than the conventional method. For iron volume, there is a difference in iron volume of 2,687.23 kg or 0,45 % less using the Tekla Structure application compared to conventional methods. The conclusion from this study is that the calculation of the bill of quantity using the conventional method is greater than using the Tekla Structure application.
INVESTIGATION OF TEMPERATURES AND HOLDING TIMES ON HIGH-STRENGTH LOW-ALLOY STEEL FOR TANK TRACK LINKS Selly Septianissa; Widantha, Komang Widhi; Waldi, Muhamad
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 24 No. 2 (2024): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v24i2.87-92

Abstract

In Indonesia, the reliance on foreign countries for military components persists, including tank track links which are crucial for combat vehicles. These components require mechanical properties such as wear resistance and toughness to ensure high safety standards. High Strength Low Alloy (HSLA) steel is used, necessitating precise composition and appropriate heat treatment processes. This study varied compositions and heat treatments to achieve desired properties, producing prototypes with five predetermined compositions. The heat treatment process involves initially heating the samples to 860°C for 30 minutes for uniformity, followed by various treatments including quenching in oil, normalizing, and multiple cycles of quenching with tempering at different temperatures and durations to refine microstructure and adjust hardness of the alloy. Results showed optimal mechanical properties in composition no. 4 after normalizing with a blower, achieving a hardness of 31 HRC. This research aimed to optimize mechanical performance during operational conditions through variations in temperatures and holding times.
APPLICATION OF MODE SHAPE DATA BASE INDICATOR (MSDBI) FOR DAMAGE DETECTION OF STEEL FRAME BRIDGE STRUCTURE BASED ON MODAL ASSURANCE CRITERION (MAC) Adhiyasa, Prima
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 24 No. 2 (2024): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v24i2.93-100

Abstract

The substantial expansion of the global economy and the extensive urbanization witnessed in recent decades have rendered bridge infrastructure as a vital component of transportation systems. Conducting structural damage detection is a vital strategy to prevent structural failures and avert bridge collapse. One popular approach for detecting damage is to use mode shapes as characteristics in structural dynamics analysis. In this study, the identification of the mode shapes in the damaged condition will utilize the Modal Assurance Criterion (MAC), while the location of the damage within the simulation will be identified using the Mode Shape Data Base Indicator (MSDBI). The study was carried out with the help of a finite element model using Midas Civil software with a case study of a steel frame bridge. Referring to the report studied, damage identification focused on damage caused by loose bolts. The results of the analysis show that the MAC analysis has consistent values on mode shapes in each damage simulation with the mode shapes produced by the healthy condition model. Meanwhile, damage location is detected by the MSDBI index value in each damage simulation. It can be seen that the MSDBI index changes according to the location of the damage.

Page 8 of 14 | Total Record : 132

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