Jurnal Rekayasa Mesin最新文献_第3页

PHYSICAL-MECHANICAL PROPERTIES OF PINEAPPLE LEAF FIBRE REINFORCED IN UNSATURATED POLYESTER RESIN FILLED WITH CALCIUM CARBONATE 填充碳酸钙的不饱和聚酯树脂增强菠萝叶纤维的物理力学性能

Jurnal Rekayasa Mesin Pub Date : 2023-12-15 DOI: 10.21776/jrm.v14i3.1451

Maulana Rachman, Kasda Kasda, Achmad Moeslihat Komara, Harjadi Gunawan, Djoko Setyanto

{"title":"PHYSICAL-MECHANICAL PROPERTIES OF PINEAPPLE LEAF FIBRE REINFORCED IN UNSATURATED POLYESTER RESIN FILLED WITH CALCIUM CARBONATE","authors":"Maulana Rachman, Kasda Kasda, Achmad Moeslihat Komara, Harjadi Gunawan, Djoko Setyanto","doi":"10.21776/jrm.v14i3.1451","DOIUrl":"https://doi.org/10.21776/jrm.v14i3.1451","url":null,"abstract":"Using natural fibres is often recommended as polymer composite materials owing to their potential to reduce the pollution of synthetic material waste. This study aimed to obtain the physical properties of unsaturated polyester resin matrix composite containing calcium carbonate fillers of 15 and 30 parts per hundred weights of the resin and natural pineapple leaf fibre of the amount 20% and 30% of the composite weight. The composite samples were three millimetres thick, with the pineapple leaf fibres arranged in one longitudinal direction. Some parameters observed included density, water absorption, response to fire, hardness, tensile strength, modulus of elasticity, and impact strength. The results showed that adding calcium carbonate filler into the matrix increased the density, water absorption, hardness, and modulus of elasticity of the composite. However, it reduced the flame propagation rate, tensile strength, and impact strength. Also, the use of pineapple leaf fibre contributed to increased water absorption, rate of flame propagation, tensile strength, modulus of elasticity, and impact strength of the composite, but it reduced the density and hardness. As these samples use economical materials, they are likely valuable for building materials that do not require high mechanical properties, especially guttering materials.","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"392 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139177584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ANALISIS PENGARUH VARIASI HOLDING TIME ANNEALING TERHADAP LAJU KOROSI TITANIUM PADA LARUTAN CAIRAN TUBUH SINTETIS 退火保温时间变化对合成体液溶液中钛腐蚀速率的影响分析

Jurnal Rekayasa Mesin Pub Date : 2023-12-15 DOI: 10.21776/jrm.v14i3.1654

Tubagus Noor Rohmannudin, Lukman Noerochim, S. Sulistijono, Candra Rizki Luthfiansyah, Rifqi Aulia Tanjung

{"title":"ANALISIS PENGARUH VARIASI HOLDING TIME ANNEALING TERHADAP LAJU KOROSI TITANIUM PADA LARUTAN CAIRAN TUBUH SINTETIS","authors":"Tubagus Noor Rohmannudin, Lukman Noerochim, S. Sulistijono, Candra Rizki Luthfiansyah, Rifqi Aulia Tanjung","doi":"10.21776/jrm.v14i3.1654","DOIUrl":"https://doi.org/10.21776/jrm.v14i3.1654","url":null,"abstract":"Biomaterials are crucial for bone implants due to their biocompatible and inert nature, ensuring no adverse effects within the human body. Titanium is renowned for its exceptional corrosion resistance. This research aims to analyze the impact of annealing holding time and pH of synthetic body fluid on the hardness and corrosion rate of titanium. The annealing process was performed at 700°C, with holding times of 30, 60, and 90 minutes. As an electrolyte medium, a Hanks' solution with pH variations of 4, 6, and 8 was used and maintained at 37°C. Potentiodynamic corrosion testing demonstrated the lowest corrosion rate in specimens treated with 30 minutes of annealing at pH 8, measuring 0.32 x 10-2 mmpy. The 30-minute annealing exhibited the lowest corrosion rate, which was confirmed by Electrochemical Impedance Spectroscopy (EIS) results showing a higher Rp value, indicating a lower corrosion rate. This is attributed to the presence of a passive Rutile TiO2 layer formed during the annealing process, as confirmed by X-ray Diffraction (XRD) analysis. Metallography observations indicated that the microstructure of untreated specimens consisted of α and β phases. Scanning Electron Microscopy (SEM) analysis of specimens annealed for 30 minutes revealed an oxide layer on the surface without any visible pores. However, an increase in annealing holding time led to the formation of pores, particularly noticeable after 90 minutes of annealing. The presence of pores in the oxide layer resulted in an increased corrosion rate with longer annealing holding times. Conversely, hardness testing demonstrated that longer annealing holding times resulted in higher hardness values.","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"83 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139178687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PENGARUH LIQUID SUCTION HEAT EXCHANGER TERHADAP KINERJA SISTEM PENDINGIN PADA MESIN PORTABLE CHILLER 吸液换热器对便携式冷水机冷却系统性能的影响

Jurnal Rekayasa Mesin Pub Date : 2023-12-15 DOI: 10.21776/jrm.v14i3.1368

Fajar Budi Sulistiono, R. Trisno

{"title":"PENGARUH LIQUID SUCTION HEAT EXCHANGER TERHADAP KINERJA SISTEM PENDINGIN PADA MESIN PORTABLE CHILLER","authors":"Fajar Budi Sulistiono, R. Trisno","doi":"10.21776/jrm.v14i3.1368","DOIUrl":"https://doi.org/10.21776/jrm.v14i3.1368","url":null,"abstract":"When the Covid-19 pandemic occured, most of the industries and public facilities were not used properly, but the cooling machines was still used, resulting in large consumption of power and electrical energy. Along with high energy consumption where the availability of energy is running low, savings are needed. As an alternative so that the cooling machine can save energy is to use the subcooling method, namely the addition of a liquid suction heat exchanger on a spiral portable chiller with 29 spirals. Furthermore, the refrigerant used in the portable chiller is R407c. This study aims to determine the effect and effectiveness of Liquid Suction Heat Exchanger on a portable chiller. The results obtained are the coefficient of performance on the non-Liquid Suction Heat Exchanger portable chiller is 4,699 with a cooling capacity of 6,668 kW and compressor performance of 1,419 kW while the portable chiller with the addition of Liquid Suction Heat Exchanger, the Coefficient Of Performance obtained is 5,197 with a cooling capacity of 6,719 kW and compressor performance of 1,219 kW. From the calculation above, the use of a liquid suction heat exchanger in a portable chiller can increase the cooling capacity by 1,97 %.","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"324 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139178054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

THE EFFECT OF PYROLYSIS DURATION ON THERMAL CONDUCTIVITY, STABILITY, AND VISCOSITY OF DISPERSED PCB-BASED PARTICLES IN THERMAL FLUID 热解持续时间对导热液体中分散 PCB 颗粒的热导率、稳定性和粘度的影响

Jurnal Rekayasa Mesin Pub Date : 2023-12-15 DOI: 10.21776/jrm.v14i3.1655

Wahyuaji Narottama Putra, M. Ariati, Bambang Suharno, D. Ferdian, R. M. Ulum

{"title":"THE EFFECT OF PYROLYSIS DURATION ON THERMAL CONDUCTIVITY, STABILITY, AND VISCOSITY OF DISPERSED PCB-BASED PARTICLES IN THERMAL FLUID","authors":"Wahyuaji Narottama Putra, M. Ariati, Bambang Suharno, D. Ferdian, R. M. Ulum","doi":"10.21776/jrm.v14i3.1655","DOIUrl":"https://doi.org/10.21776/jrm.v14i3.1655","url":null,"abstract":"Solid particles have a higher thermal conductivity compared to a fluid. Therefore, it is a common practice to disperse solid particles inside a base fluid to increase its thermal conductivity. The particle-dispersed fluid is called a thermal fluid. Thermal fluid, such as a coolant, is widely used as a heat transfer fluid. Several types of particles can be used to increase the thermal conductivity of the fluid, i.e., metallic particles, metal-oxide particles, or even carbon-based particles. In this research, a carbon-based particle was used as the dispersed particle. The particle was obtained by processing electronic waste, specifically Printed Circuit Board (PCB). The PCB was pyrolyzed for variable duration at 15, 30, and 45 minutes to increase the carbon content. After pyrolyzing, the particle was milled to reduce its size. Subsequently, the PCB particle was added to distilled water. Sodium Dodecylbenzene Sulfonate (SDBS) was added as a surfactant to increase fluid stability and prevent particle agglomeration. Thermal conductivity was improved by up to a 13% increase at the 15-minute pyrolysis. Adding SDBS surfactant also improves the thermal fluid's stability to -29,1 mV. The fluid's viscosity was slightly increased up to a maximum of 0.984 mPa.S.","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"729 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139177404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

DETEKSI CACAT BANTALAN GELINDING BERBASIS ALGORITMA DECISION TREES DAN PARAMETER STATISTIK 基于决策树算法和参数统计的凝胶凝结检测

Jurnal Rekayasa Mesin Pub Date : 2023-12-15 DOI: 10.21776/jrm.v14i3.1351

B. P. Kamiel, Fauzan Anjarico, Sudarisman Sudarisman

{"title":"DETEKSI CACAT BANTALAN GELINDING BERBASIS ALGORITMA DECISION TREES DAN PARAMETER STATISTIK","authors":"B. P. Kamiel, Fauzan Anjarico, Sudarisman Sudarisman","doi":"10.21776/jrm.v14i3.1351","DOIUrl":"https://doi.org/10.21776/jrm.v14i3.1351","url":null,"abstract":"Rolling bearings are a common machine element found in rotary machines. The components in the rolling bearing such as the inner race, outer race, rolling element, and cage are the parts that are often damaged. Traditionally spectrum analysis is used to diagnose bearing defects. However, spectrum analysis is not effectively applied to bearings with early defects because the vibration signal generated is dominated by frequency components from other machine elements, so the frequency of bearing defects cannot be observed. This study proposes an alternative method of detecting bearing defects based on vibration signals using machine learning with a decision tree algorithm. This method is more effective than the spectrum analysis method because machine learning is based on feature extraction and pattern recognition of vibration signal data, therefore, providing classification results directly without further analysis. Vibration signals were recorded using an accelerometer mounted on a bearing housing on a test rig. Nine-time domain statistical parameters and six frequency domain statistical parameters were extracted from the vibration signal and then used as input for decision trees. The results show that the decision trees algorithm gives an accuracy of 94.4% for classifying three rolling bearing conditions using the input of 6 selected frequency domain statistical parameters.","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"403 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139177952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PENGARUH VARIASI KECEPATAN PUTAR DAN DIAMETER PIN TOOLS TERHADAP KUAT GESER DAN STRUKTUR MAKRO SAMBUNGAN FRICTION STIR WELDING DISSIMILAR HIGH DENSITY POLYETHYLENE-POLYPROPYLENE 在搅拌摩擦焊接异种高密度聚乙烯-聚丙烯过程中，测量不同的焊接工具和直径针工具的差异

Jurnal Rekayasa Mesin Pub Date : 2023-12-15 DOI: 10.21776/jrm.v14i3.1376

Totok Suwanda, Nur Ardiyansyah

引用次数: 0

PENGECORAN ALUMINIUM MATRIKS KOMPOSIT BERPENGUAT CARBON NANOTUBE (CNT) DENGAN VARIASI PENAMBAHAN SERBUK MAGNESIUM 随着镁粉添加量的变化铸造铝基复合材料增强碳纳米管 (cnt)

Jurnal Rekayasa Mesin Pub Date : 2023-12-15 DOI: 10.21776/jrm.v14i3.1656

M. Syahid, Elyeser Elyeser, Azwar Hayat

{"title":"PENGECORAN ALUMINIUM MATRIKS KOMPOSIT BERPENGUAT CARBON NANOTUBE (CNT) DENGAN VARIASI PENAMBAHAN SERBUK MAGNESIUM","authors":"M. Syahid, Elyeser Elyeser, Azwar Hayat","doi":"10.21776/jrm.v14i3.1656","DOIUrl":"https://doi.org/10.21776/jrm.v14i3.1656","url":null,"abstract":"Aluminum matrix composite reinforced CNT have been developed to improve the mechanical properties of aluminum. In this study, the melting of Aluminum 1100 reinforced Carbon Nanotube (1 wt.% CNT) with variations in the addition of Magnesium powder was carried out by the slurry-based method. The casting of the specimens is carried out using a metal mold. CNT powder was first mixed with magnesium powder at 60°C. Then the aluminum is melted to a temperature of 700°C until it melts, then the temperature is lowered to 500°C or the texture has changed to be like mush (slurry based) and then mixed with CNT powder and Magnesium powder are added. After that the alloy was raised again at 720°C for 30 minutes and the stirring process was carried out, after that it was poured into a metal mold with a mold temperature of around 400°C. The samples were then analyzed for mechanical properties and microstructure observations. The results of the Vickers hardness test before the addition of Mg powder and CNT were 36.7 HV. While after the variation of adding 1wt.% Mg powder, the hardness of the specimen increased to 44.5 HV, the variation of adding 3% Mg powder was 45.3 HV, and the variation of adding 5% Mg powder reached a hardness value of 46 HV. The tensile test results on 3% Mg powder is 241.6 MPa. The wear test results show the wear rate value for the 1% Mg variation of 0.146 mg/s, the 3% Mg variation of 0.106 mg/s, and the 5% Mg variation with a wear rate value of 0.093 mg/s. The α-Al phase is the dominant phase formed, where the grain size and grain boundaries in the 3% Mg variation have a relatively small size and the spread of CNT is evenly distributed in the alloy, so the addition of Mg to the alloy can help spread CNT in Aluminum alloys.","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"871 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139178244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

SIMULATION-BASED ASSESSMENT KINERJA TERMAL PADA CONCENTRIC TUBE HEAT EXCHANGER 基于仿真的同心管式换热器终端评估

Jurnal Rekayasa Mesin Pub Date : 2023-12-15 DOI: 10.21776/jrm.v14i3.1372

B. Kristiawan, A. Wijayanta, W. E. Juwana, R. A. Rachmanto, Koji Enoki, Arfi Singgih Prasojo

引用次数: 0

THE EFFECT OF INFILL PATTERN AND DENSITY PARAMETERS ON TENSILE STRENGTH OF POLYMER MATERIALS IN 3D PRINTING 填充模式和密度参数对 3d 打印中聚合物材料拉伸强度的影响

Jurnal Rekayasa Mesin Pub Date : 2023-12-15 DOI: 10.21776/jrm.v14i3.1005

Sally Cahyati, Reky Amanda Putra

{"title":"THE EFFECT OF INFILL PATTERN AND DENSITY PARAMETERS ON TENSILE STRENGTH OF POLYMER MATERIALS IN 3D PRINTING","authors":"Sally Cahyati, Reky Amanda Putra","doi":"10.21776/jrm.v14i3.1005","DOIUrl":"https://doi.org/10.21776/jrm.v14i3.1005","url":null,"abstract":"One of the references for selecting materials in designing a machine component is its mechanical property which is tensile strength. However, the current tensile strength from the materials used in 3D printing products has not been standardized due to many parameters in the design and process that affect them. The selection of correct design and process parameters may result in the proper mechanical properties and minimize the time and amount of materials used during the printing process. The parameters expected to affect the mechanical properties are density and infill pattern. This study was conducted to observe how far the effect of them on the mechanical properties of 3D printing product's tensile strength. The specimen standard of tensile strength used was ASTM D638, while the tested infill pattern was Grid, Triangles, and Tri-Hexagon patterns, with the percentage of total infill density of 20%, 40%, and 60%. PLA (Polylactic Acid) was chosen as the material used in this study. The 3D print machine operated was 3D Print MakerGear M2 with the tensile testing machine of HTE Hounsfield. The results of this study concluded that the percentage of infill density 20%, 40%, and 60% with different infill patterns had different tensile strengths. The specimen with a Tri-Hexagon infill pattern and 60% density had the biggest tensile strength value, followed by the Triangles infill pattern and the smallest one was the Grid pattern with 20% density.","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"211 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139177903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

TRIBO-CORROSION INVESTIGATION ON MATERIAL 316LX MANUFACTURING RESULT OF 3D PRINTING MATERIAL ADDITIVES IN 5% H2SO4 SOLUTION 3d 打印材料添加剂在 5% H2so4 溶液中对 316lx 材料的三重腐蚀研究结果

Jurnal Rekayasa Mesin Pub Date : 2023-12-15 DOI: 10.21776/jrm.v14i3.1652

E. Syuryana, Asep Indra Komara, Bambang Widyanto, S. Sutarno, Manty A. Ikaningsih, Dicko Adrian Aditya, Riskamti Riskamti, Moch. Salman Fadillah Suardana, Cagiva Abdul Malik

{"title":"TRIBO-CORROSION INVESTIGATION ON MATERIAL 316LX MANUFACTURING RESULT OF 3D PRINTING MATERIAL ADDITIVES IN 5% H2SO4 SOLUTION","authors":"E. Syuryana, Asep Indra Komara, Bambang Widyanto, S. Sutarno, Manty A. Ikaningsih, Dicko Adrian Aditya, Riskamti Riskamti, Moch. Salman Fadillah Suardana, Cagiva Abdul Malik","doi":"10.21776/jrm.v14i3.1652","DOIUrl":"https://doi.org/10.21776/jrm.v14i3.1652","url":null,"abstract":"Tribocorrosion is a type of material degradation caused by simultaneous wear and corrosion of metal surfaces caused by laminar or turbulent flow. Additive manufacturing technology plays an important role in its application to precision components and complex assemblies. This study developed a 316LX material with Fe, Ni, Cr, and other powder alloys that was processed into an ultra-protective wire as a 3D printing filler. This simulation of tribocorrosion conditions was performed on a triboester machine. This simulation is expected to provide important insights and understanding into the behavior and properties of the 316LX 3D printing material, especially when exposed to abrasion and corrosion conditions in a sulfuric acid solution environment. Corrosion Rate Testing of 316LX Material Additives Using Potentiodynamic Methods in a Modified Rotating 5% Sulfuric Acid Fluid. In addition to corrosion rate, the Vickers hardness, metallography, and shrinkage of the 316LX green part material were also tested at 1000oC after sintering.","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"396 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139178079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0