Pub Date : 2021-12-22DOI: 10.31289/jmemme.v5i2.5027
Lasinta Ari Nendra Wibawa
Landing skids are an important component of uncrewed helicopters. The landing skid acts as a support when the helicopter lands or is parked. This paper examines the effect of landing speed and material selection on the safety factor of uncrewed helicopter landing skids using Ansys Workbench. The uncrewed helicopter weighs 100 kg and an impact time of 0.5 seconds. Landing speed variations are 2 m/s, 3 m/s, and 4 m/s. The materials used in the simulation are plastic types, namely ABS, HDPE, Polyamide (PA6), and Polycarbonate (PC). The simulation results show that the ABS and HDPE materials can only withstand impact loads up to a landing speed of 3 m/s because they have a safety factor of 3.57 and 3.69, respectively. Meanwhile, Polyamide (PA6) and Polycarbonate (PC) can withstand impact loads up to a landing speed of 4 m/s because they have a safety factor of 4.19 and 6.03, respectively
{"title":"Pengaruh Kecepatan Landing dan Pemilihan Material terhadap Faktor Keamanan Landing Skid Helikopter Tanpa Awak Menggunakan Ansys Workbench","authors":"Lasinta Ari Nendra Wibawa","doi":"10.31289/jmemme.v5i2.5027","DOIUrl":"https://doi.org/10.31289/jmemme.v5i2.5027","url":null,"abstract":"Landing skids are an important component of uncrewed helicopters. The landing skid acts as a support when the helicopter lands or is parked. This paper examines the effect of landing speed and material selection on the safety factor of uncrewed helicopter landing skids using Ansys Workbench. The uncrewed helicopter weighs 100 kg and an impact time of 0.5 seconds. Landing speed variations are 2 m/s, 3 m/s, and 4 m/s. The materials used in the simulation are plastic types, namely ABS, HDPE, Polyamide (PA6), and Polycarbonate (PC). The simulation results show that the ABS and HDPE materials can only withstand impact loads up to a landing speed of 3 m/s because they have a safety factor of 3.57 and 3.69, respectively. Meanwhile, Polyamide (PA6) and Polycarbonate (PC) can withstand impact loads up to a landing speed of 4 m/s because they have a safety factor of 4.19 and 6.03, respectively","PeriodicalId":102197,"journal":{"name":"JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130482511","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}
Pub Date : 2021-12-22DOI: 10.31289/jmemme.v5i2.5181
Lohdy Diana, A. Setiyawan, Achmad Bahrul Ulum, A. G. Safitra, M. N. Ariansyah
The primary air fan functions as a primary air producer which is used as air to transport coal powder from the pulverizer to the burner to be burned in the boiler furnace. This study aims to obtain the effect of the rotation variation of fan to fluid flow characteristics such as the distribution of total pressure, the dynamic pressure, the pressure static contours, velocity distribution, and the fan optimal efficiency. This study was numerical study with simulated a backward impeller type centrifugal fan in a two-dimension model using Fluid Computational software with the multiple reference frame method with the variation of fan rotation. Based on the visualization of the pressure contour and velocity distribution, it could be concluded that there was a volute phenomenon, this was indicated that the greater the volume area in the volute is the greater the total pressure value too. Based on the visualization of the outlet velocity distribution at the position of -0,8531m to -1,01301m, it was found that the velocity is close to the value of 0 m/s2. It showed that the minimum velocity in the area due to the volute tongue radius occurs a flow collision and it impacted the velocity in the area decreased up to V=0. From the simulation results, it was found that the greater the fan rotation value was the greater the efficiency value too. It would be verified by the actual operating data of the centrifugal fan with a minimum rotation range value of 1194 rpm to a maximum of 1468 rpm
{"title":"Studi Numerik Centrifugal Fan Tipe Impeller Backward dengan Variasi Putaran Fan","authors":"Lohdy Diana, A. Setiyawan, Achmad Bahrul Ulum, A. G. Safitra, M. N. Ariansyah","doi":"10.31289/jmemme.v5i2.5181","DOIUrl":"https://doi.org/10.31289/jmemme.v5i2.5181","url":null,"abstract":"The primary air fan functions as a primary air producer which is used as air to transport coal powder from the pulverizer to the burner to be burned in the boiler furnace. This study aims to obtain the effect of the rotation variation of fan to fluid flow characteristics such as the distribution of total pressure, the dynamic pressure, the pressure static contours, velocity distribution, and the fan optimal efficiency. This study was numerical study with simulated a backward impeller type centrifugal fan in a two-dimension model using Fluid Computational software with the multiple reference frame method with the variation of fan rotation. Based on the visualization of the pressure contour and velocity distribution, it could be concluded that there was a volute phenomenon, this was indicated that the greater the volume area in the volute is the greater the total pressure value too. Based on the visualization of the outlet velocity distribution at the position of -0,8531m to -1,01301m, it was found that the velocity is close to the value of 0 m/s2. It showed that the minimum velocity in the area due to the volute tongue radius occurs a flow collision and it impacted the velocity in the area decreased up to V=0. From the simulation results, it was found that the greater the fan rotation value was the greater the efficiency value too. It would be verified by the actual operating data of the centrifugal fan with a minimum rotation range value of 1194 rpm to a maximum of 1468 rpm","PeriodicalId":102197,"journal":{"name":"JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126424744","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}
Pub Date : 2021-12-22DOI: 10.31289/jmemme.v5i2.5787
I. Hermawan, Muhammad Idris, Darianto Darianto, M. Y. R. Siahaan
The availability of fossil fuels as an energy source is increasingly limited, so there is a need for new energy sources as environmentally friendly alternatives, one of which is bioethanol. Bioethanol is a type of biofuel sourced from living matter, usually plants with the chemical formula C2H5OH and the empirical formula C2H5O with an octane number of 108. One of the benefits of bioethanol for fuel mixtures is due to the higher octane value, flammability, heat of vaporization and higher oxygen content lowers cylinder temperature thereby reducing NOx emissions and producing less CO2. This study aims to evaluate the performance of a 4 stroke engine by comparing the use of Pertamax and bioethanol mixtures of fuel with a composition of 25%, 20%, and O% bioethanol. The study used an experimental method where data was collected and then data processing and data analysis were carried out. The results obtained the highest power of 8.70 kW at 25% bioethanol at 6000 rpm, followed by 20% bioethanol and 100% Pertamax at 8.60 rpm with rotations of 6500 rpm and 7000 rpm respectively. The highest torque of 25% bioethanol is 13.80 Nm at 5500 rpm, followed by 3.10 Nm at 5000 rpm at 100% pertamax and 12.80 Nm at 5500 rpm with 20% bioethanol fuel. The lowest fuel consumption is 0.57 kg/kWh at 7000 rpm with 100% pertamax fuel, then 0.60 kg/kWh with 20% bioethanol fuel at 6500 rpm and 0.6 kg/kWh with 15% bioethanol fuel at 6000 rpm
{"title":"Kinerja Mesin Motor 4 Langkah dengan Bahan Bakar Campuran Bioetanol dan Pertamax","authors":"I. Hermawan, Muhammad Idris, Darianto Darianto, M. Y. R. Siahaan","doi":"10.31289/jmemme.v5i2.5787","DOIUrl":"https://doi.org/10.31289/jmemme.v5i2.5787","url":null,"abstract":"The availability of fossil fuels as an energy source is increasingly limited, so there is a need for new energy sources as environmentally friendly alternatives, one of which is bioethanol. Bioethanol is a type of biofuel sourced from living matter, usually plants with the chemical formula C2H5OH and the empirical formula C2H5O with an octane number of 108. One of the benefits of bioethanol for fuel mixtures is due to the higher octane value, flammability, heat of vaporization and higher oxygen content lowers cylinder temperature thereby reducing NOx emissions and producing less CO2. This study aims to evaluate the performance of a 4 stroke engine by comparing the use of Pertamax and bioethanol mixtures of fuel with a composition of 25%, 20%, and O% bioethanol. The study used an experimental method where data was collected and then data processing and data analysis were carried out. The results obtained the highest power of 8.70 kW at 25% bioethanol at 6000 rpm, followed by 20% bioethanol and 100% Pertamax at 8.60 rpm with rotations of 6500 rpm and 7000 rpm respectively. The highest torque of 25% bioethanol is 13.80 Nm at 5500 rpm, followed by 3.10 Nm at 5000 rpm at 100% pertamax and 12.80 Nm at 5500 rpm with 20% bioethanol fuel. The lowest fuel consumption is 0.57 kg/kWh at 7000 rpm with 100% pertamax fuel, then 0.60 kg/kWh with 20% bioethanol fuel at 6500 rpm and 0.6 kg/kWh with 15% bioethanol fuel at 6000 rpm","PeriodicalId":102197,"journal":{"name":"JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128012122","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}
Pub Date : 2021-12-22DOI: 10.31289/jmemme.v5i2.5349
Rakhmad Arief Siregar, M. Y. R. Siahaan, Riki Juliansyah
The study of mandibular reconstruction is known to be the most challenging procedure because a deformed chin may result in a person having low self-esteem. Despite advances in medical technology, there are always new trends related to mandibular implants. This study investigates the effect of reconstructed mandibular geometry on von Mises stress. There are three reconstructed mandibular models based on dental arches, square, ovoid and tapered to observe the distribution of von Mises stress. The three models were subjected to three varying loads around the alveolar ridge to simulate biting activity. The results show that geometric factors affect the distribution of von Mises stress, where the mandible with a tapered dental arch shows lower von Mises stress response compared to other mandibular models and has a significant effect when the applied load increases
{"title":"Simulasi Numerik tentang pengaruh geometri mandibula yang direkonstruksi terhadap tegangan von Mises","authors":"Rakhmad Arief Siregar, M. Y. R. Siahaan, Riki Juliansyah","doi":"10.31289/jmemme.v5i2.5349","DOIUrl":"https://doi.org/10.31289/jmemme.v5i2.5349","url":null,"abstract":"The study of mandibular reconstruction is known to be the most challenging procedure because a deformed chin may result in a person having low self-esteem. Despite advances in medical technology, there are always new trends related to mandibular implants. This study investigates the effect of reconstructed mandibular geometry on von Mises stress. There are three reconstructed mandibular models based on dental arches, square, ovoid and tapered to observe the distribution of von Mises stress. The three models were subjected to three varying loads around the alveolar ridge to simulate biting activity. The results show that geometric factors affect the distribution of von Mises stress, where the mandible with a tapered dental arch shows lower von Mises stress response compared to other mandibular models and has a significant effect when the applied load increases","PeriodicalId":102197,"journal":{"name":"JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123891139","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}
Pub Date : 2021-12-22DOI: 10.31289/jmemme.v5i2.4816
B. Siswanto, B. Saputro, Melya Dyanasari Sebayang
Forming sheet plastic into various new shapes and applications, this plastic is adjusted to the design we want with the help of heat, pressure and molding. The purpose of this study was to determine the energy and heat value released by PVC material with variations in heating and cooling temperatures in the forming unit,to determine the effect of PVC process temperature on thermal properties with DSC tools and to determine the effect of PVC process temperature on functional groups using FTIR tools.The calculation results show that the heat released by the A.1 material is 1,740 Watt and A.2 is 1,938 Watt. The energy received by the cooling water in the 30th minute on specimen A.1 is 5.571 Watt and A.2 is 14,857 Watt with each temperature increase of 0.5℃. The results of the DSC test samples A.1 (defective) and A.2 (good) show that the melting temperature of the two is almost the same, which is around 78oC but there is a difference in Tg (temperature glass) of 0.013 J/goC faster than the A.2 test specimen 115oC (Very nice). The results of the FTIR test samples A.1 (disabled), A.2 (good) showed the highest difference in wavelength up to 8.4% at the wave values of 3749.77cm-1 and 3740.90cm-1.
{"title":"Analisis Pengaruh Temperatur Terhadap Sifat Termal dan Gugus Fungsi Proses Thermoforming Material Polivinilklorida","authors":"B. Siswanto, B. Saputro, Melya Dyanasari Sebayang","doi":"10.31289/jmemme.v5i2.4816","DOIUrl":"https://doi.org/10.31289/jmemme.v5i2.4816","url":null,"abstract":"Forming sheet plastic into various new shapes and applications, this plastic is adjusted to the design we want with the help of heat, pressure and molding. The purpose of this study was to determine the energy and heat value released by PVC material with variations in heating and cooling temperatures in the forming unit,to determine the effect of PVC process temperature on thermal properties with DSC tools and to determine the effect of PVC process temperature on functional groups using FTIR tools.The calculation results show that the heat released by the A.1 material is 1,740 Watt and A.2 is 1,938 Watt. The energy received by the cooling water in the 30th minute on specimen A.1 is 5.571 Watt and A.2 is 14,857 Watt with each temperature increase of 0.5℃. The results of the DSC test samples A.1 (defective) and A.2 (good) show that the melting temperature of the two is almost the same, which is around 78oC but there is a difference in Tg (temperature glass) of 0.013 J/goC faster than the A.2 test specimen 115oC (Very nice). The results of the FTIR test samples A.1 (disabled), A.2 (good) showed the highest difference in wavelength up to 8.4% at the wave values of 3749.77cm-1 and 3740.90cm-1.","PeriodicalId":102197,"journal":{"name":"JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY","volume":"470 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116142157","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}
Pub Date : 2021-12-22DOI: 10.31289/jmemme.v5i2.4630
B. Siswanto
The dislocation density, micro lattice strain, crystal size, microstructure and hardness of T6 heating treatment have been carried out with variations in temperature of artificial age in Al97,11Mg1,52Si0,86Zn0,51 alloys. The Al97,11Mg1,52Si0,86Zn0,51 alloy sample was made with granular metallurgy and then T6 was heated (solid solution heating at 530 0C for 1 hour and temperature variations of artificial age 1400C, 1700C, and 2000C and time for 1 hour). The hardness test results showed that the Al97,11Mg1,52Si0,86Zn0,51alloy increased due to variations in artificial age temperatures. Microstructure observation shows hypoeutectic structure consisting of primary aluminum dendrite and eutectic mixture of Al97,11Mg1,52Si0,86Zn0,51. The results of the analysis of dislocation density, microstructure, and crystal size after T6 heat treatment showed that the Al97,11Mg1,52Si0,86Zn0,51 alloy. consists of the -Al phase, and the Mg2Si phase. The results of artificial age resulted in recrystallization and grain growth as evidenced by an increase in micro-strain from 25.05% to 32.83% in the Miller index (311), an increase in crystallite size from 7.6734 nm to 21.3354 nm, and a decrease in dislocation density. from 0.0624 1/mm2 to 0.0067 1/mm2 and a decrease in yield strength from 573.54 MPa to 312.65 MPa.
{"title":"Pengaruh Temperatur Artificial Age Terhadap Kekerasan, Kekuatan Luluh dan Kerapatan Dislokasi Pada Paduan Al97,11Mg1,52Si0,86Zn0,51","authors":"B. Siswanto","doi":"10.31289/jmemme.v5i2.4630","DOIUrl":"https://doi.org/10.31289/jmemme.v5i2.4630","url":null,"abstract":"The dislocation density, micro lattice strain, crystal size, microstructure and hardness of T6 heating treatment have been carried out with variations in temperature of artificial age in Al97,11Mg1,52Si0,86Zn0,51 alloys. The Al97,11Mg1,52Si0,86Zn0,51 alloy sample was made with granular metallurgy and then T6 was heated (solid solution heating at 530 0C for 1 hour and temperature variations of artificial age 1400C, 1700C, and 2000C and time for 1 hour). The hardness test results showed that the Al97,11Mg1,52Si0,86Zn0,51alloy increased due to variations in artificial age temperatures. Microstructure observation shows hypoeutectic structure consisting of primary aluminum dendrite and eutectic mixture of Al97,11Mg1,52Si0,86Zn0,51. The results of the analysis of dislocation density, microstructure, and crystal size after T6 heat treatment showed that the Al97,11Mg1,52Si0,86Zn0,51 alloy. consists of the -Al phase, and the Mg2Si phase. The results of artificial age resulted in recrystallization and grain growth as evidenced by an increase in micro-strain from 25.05% to 32.83% in the Miller index (311), an increase in crystallite size from 7.6734 nm to 21.3354 nm, and a decrease in dislocation density. from 0.0624 1/mm2 to 0.0067 1/mm2 and a decrease in yield strength from 573.54 MPa to 312.65 MPa.","PeriodicalId":102197,"journal":{"name":"JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121991030","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}
Pub Date : 2021-12-22DOI: 10.31289/jmemme.v5i2.5405
N. Hayati, Adi Purwanto, Erwan Muladi
Pipes are used as a means of fluid transportation from a reservoir to a destination. In a piping system, flow loss or head loss is always found, both head loss due to pipe size and head loss due to bends, one of which is the knee. The purpose of this study was to determine the effect of knee diameter on flow headloss. The method used is simulation and monogram calculation. Based on the standard ASME B16.9 B16.28 used knees with a diameter of 1, 2, 4 and inch. The experimental results show the same behavior between the simulation and the monogram calculation. The larger the knee diameter, the smaller the head loss. Headloss simulation results for knee diameters 1,2,4 and 6 inches are 0,012 m, 0,0093 m, 0,00063 m and 0,00426 m, respectively. Meanwhile, the headloss calculated by the monogram is 0.006 m, 0.0024 m, 0.0007 m and 0.004 m, respectively. The smallest headloss occurred at 4 inches in diameter indicating that the knee with this diameter is the best knee among the other four knees
管道是流体从储存库输送到目的地的一种工具。在管道系统中，总是会发现流量损失或水头损失，包括管道尺寸造成的水头损失和弯道造成的水头损失，其中一种是弯管。本研究的目的是确定膝关节直径对流量损失的影响。所采用的方法是模拟和字母组合计算。基于标准ASME B16.9 B16.28使用的膝盖直径为1,2,4和英寸。实验结果表明，模拟结果与字母组合计算结果基本一致。膝关节直径越大，头部损失越小。对于直径为1,2,4和6英寸的弯管，Headloss模拟结果分别为0,012 m, 0,0093 m, 0,00063 m和0,00426 m。同时，由字母组合计算的水头损失分别为0.006 m、0.0024 m、0.0007 m和0.004 m。头部损失最小的是直径为4英寸的膝盖，这表明这个直径的膝盖是其他四个膝盖中最好的
{"title":"Pengaruh Diameter Knee pada Headloss Aliran Berbasis Monogram, CAD dan CAE","authors":"N. Hayati, Adi Purwanto, Erwan Muladi","doi":"10.31289/jmemme.v5i2.5405","DOIUrl":"https://doi.org/10.31289/jmemme.v5i2.5405","url":null,"abstract":"Pipes are used as a means of fluid transportation from a reservoir to a destination. In a piping system, flow loss or head loss is always found, both head loss due to pipe size and head loss due to bends, one of which is the knee. The purpose of this study was to determine the effect of knee diameter on flow headloss. The method used is simulation and monogram calculation. Based on the standard ASME B16.9 B16.28 used knees with a diameter of 1, 2, 4 and inch. The experimental results show the same behavior between the simulation and the monogram calculation. The larger the knee diameter, the smaller the head loss. Headloss simulation results for knee diameters 1,2,4 and 6 inches are 0,012 m, 0,0093 m, 0,00063 m and 0,00426 m, respectively. Meanwhile, the headloss calculated by the monogram is 0.006 m, 0.0024 m, 0.0007 m and 0.004 m, respectively. The smallest headloss occurred at 4 inches in diameter indicating that the knee with this diameter is the best knee among the other four knees","PeriodicalId":102197,"journal":{"name":"JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133352423","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}
Pub Date : 2020-12-31DOI: 10.23960/MECH.V11.I2.202007
F. Rahmadianto, G. A. Pohan, E. Susanto
Energi terbarukan dikembangkan untuk mengurangi pemakaian bahan bakar fosil yang mulai menipis. Salah satu usaha penggunaan energi alternatif adalah dengan membentuk briket biomassa. Briket digunakan sebagai bahan bakar alternatif pengganti bahan bakar fosil. Dengan menggunakan briket, kebutuhan energi fosil bisa dikurangi. Dalam penelitian ini, briket memanfaatkan bahan limbah pertanian dan ternak. Indonesia memiliki wilayah yang sangat subur untuk budidaya dan peternakan yang dapat digunakan sebagai bahan baku biocharcoal. Bahan briket dengan berat 1 kg menggunakan campuran arang tinja ayam (variasi 30%, 40%, dan 50%) yang dicampur dengan tetes tebu (variasi 10%, 20%, dan 30%) dan lumpur lapindo (variasi 20%, 30%, dan 40%). Briket ditekan dengan beban sebesar 80 kgf selama 1 menit. Nilai kalor pada spesimen untuk masing-masing variasi spesimen diinvestigasi. Dalam penelitian ini, faktor-faktor yang paling mempengaruhi nilai kalor dianalisa. Komposisi arang tinja, tetes tebu, dan lumpur dicari untuk memperoleh nilai kalor terbaik.
{"title":"Analisis Campuran Lumpur Dan Tetes Tebu Pada Briket Tinja Hewan Dengan Metode Taguchi","authors":"F. Rahmadianto, G. A. Pohan, E. Susanto","doi":"10.23960/MECH.V11.I2.202007","DOIUrl":"https://doi.org/10.23960/MECH.V11.I2.202007","url":null,"abstract":"Energi terbarukan dikembangkan untuk mengurangi pemakaian bahan bakar fosil yang mulai menipis. Salah satu usaha penggunaan energi alternatif adalah dengan membentuk briket biomassa. Briket digunakan sebagai bahan bakar alternatif pengganti bahan bakar fosil. Dengan menggunakan briket, kebutuhan energi fosil bisa dikurangi. Dalam penelitian ini, briket memanfaatkan bahan limbah pertanian dan ternak. Indonesia memiliki wilayah yang sangat subur untuk budidaya dan peternakan yang dapat digunakan sebagai bahan baku biocharcoal. Bahan briket dengan berat 1 kg menggunakan campuran arang tinja ayam (variasi 30%, 40%, dan 50%) yang dicampur dengan tetes tebu (variasi 10%, 20%, dan 30%) dan lumpur lapindo (variasi 20%, 30%, dan 40%). Briket ditekan dengan beban sebesar 80 kgf selama 1 menit. Nilai kalor pada spesimen untuk masing-masing variasi spesimen diinvestigasi. Dalam penelitian ini, faktor-faktor yang paling mempengaruhi nilai kalor dianalisa. Komposisi arang tinja, tetes tebu, dan lumpur dicari untuk memperoleh nilai kalor terbaik.","PeriodicalId":102197,"journal":{"name":"JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131554803","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}
Pub Date : 2019-07-01DOI: 10.31289/JMEMME.V3I1.2429
Bobby Umroh, Darianto Darianto, Rinto Supardi Sipangkar
Kelapa muda umumnya disajikan secara alami dengan bentuk kerucut di atas. Proses pembentukan kelapa ini sudah dilakukan secara manual di industri rumah tangga dengan menggunakan sebilah parang. Proses ini memiliki resiko kecelakaan kerja yang tinggi. Kelapa yang dihasilkan pada proses ini memiliki bentuk yang kurang menarik, tidak seragam, dan sulit untuk dibuka. Oleh sebab itu, dibutuhkan alat pengiris kulit kelapa muda yang dapat menghasilkan bentuk yang lebih baik, seragam, dan aman untuk digunakan. Untuk merancang alat pengiris kulit kelapa muda, penting untuk melakukan analisis mekanisme pemotongan kulit kelapa muda. Tujuan dari penelitian ini adalah untuk menganalisis mekanisme pemotongan kulit kelapa muda, membangun model matematika pendugaan gaya spesifik pemotongan, dan mendapatkan daya pemotongan maksimum pemotongan kulit kelapa muda. Variasi faktor sudut ketajaman, sudut potong, dan sisi mata pisau dioptimalkan untuk menghasilkan gaya potong terendah. Model matematika telah dibangun untuk menduga gaya pemotongan maksimum untuk pisau satu sisi menajam dan dua sisi menajam dengan sudut potong (θ) 00, 150, dan 300. Dari hasil penelitian disimpulkan bahwa jenis pisau yang menghasilkan gaya pemotongan terendah adalah pisau dua sisi menajam dengan sudut ketajaman 100 dan sudut potong 300. Daya terendah untuk pemotongan tegak lurus kulit kelapa muda adalah 0,12 kW yang dihasilkan dengan menggunakan pisau dua sisi menajam dengan sudut ketajaman 100 dan sudut potong 300. Daya pemutaran maksimum yang dibutuhkan untuk memotong kulit kelapa muda adalah 0,75 kW.
{"title":"ANALISA KINERJA MATA PISAU MESIN PENGIRIS KULIT KELAPA MUDA","authors":"Bobby Umroh, Darianto Darianto, Rinto Supardi Sipangkar","doi":"10.31289/JMEMME.V3I1.2429","DOIUrl":"https://doi.org/10.31289/JMEMME.V3I1.2429","url":null,"abstract":"Kelapa muda umumnya disajikan secara alami dengan bentuk kerucut di atas. Proses pembentukan kelapa ini sudah dilakukan secara manual di industri rumah tangga dengan menggunakan sebilah parang. Proses ini memiliki resiko kecelakaan kerja yang tinggi. Kelapa yang dihasilkan pada proses ini memiliki bentuk yang kurang menarik, tidak seragam, dan sulit untuk dibuka. Oleh sebab itu, dibutuhkan alat pengiris kulit kelapa muda yang dapat menghasilkan bentuk yang lebih baik, seragam, dan aman untuk digunakan. Untuk merancang alat pengiris kulit kelapa muda, penting untuk melakukan analisis mekanisme pemotongan kulit kelapa muda. Tujuan dari penelitian ini adalah untuk menganalisis mekanisme pemotongan kulit kelapa muda, membangun model matematika pendugaan gaya spesifik pemotongan, dan mendapatkan daya pemotongan maksimum pemotongan kulit kelapa muda. Variasi faktor sudut ketajaman, sudut potong, dan sisi mata pisau dioptimalkan untuk menghasilkan gaya potong terendah. Model matematika telah dibangun untuk menduga gaya pemotongan maksimum untuk pisau satu sisi menajam dan dua sisi menajam dengan sudut potong (θ) 00, 150, dan 300. Dari hasil penelitian disimpulkan bahwa jenis pisau yang menghasilkan gaya pemotongan terendah adalah pisau dua sisi menajam dengan sudut ketajaman 100 dan sudut potong 300. Daya terendah untuk pemotongan tegak lurus kulit kelapa muda adalah 0,12 kW yang dihasilkan dengan menggunakan pisau dua sisi menajam dengan sudut ketajaman 100 dan sudut potong 300. Daya pemutaran maksimum yang dibutuhkan untuk memotong kulit kelapa muda adalah 0,75 kW.","PeriodicalId":102197,"journal":{"name":"JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123849635","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}
Pub Date : 2019-07-01DOI: 10.31289/JMEMME.V3I1.2416
A. Zulfikar, B. Umroh, M. Y. R. Siahaan
Polymeric composite foam with EFB fiber reinforced is new material that can be utilized as an alternative engineering material. EFB fiber utilization becomes the center of subject in this research. Moreover, these composites are unique with the presence of cavities (foam) in the matrix of unsaturated polyester resin. It results a decrease in density of the material that formed, and obtain a thermoset polymer composite material lighter than any else similar type. The objective of this study is to obtain the best manufacturing techniques of composite material, the mechanical behavior of these materials due to tensile static loading and high strain rate impact, and the distribution of foam that occur in the material that formed as a result of blowing agent (BA) from the type of polyurethane (PU). In this research, the sample formed into standard specimen of testing, such as ASTM D638 for static tensile test, and impact test specimen. Mechanical’s behaviors that are obtained in this research are density, tensile strength, modulus of elasticity (E), the incident stress, and dynamic modulus of elasticity of the material. For static testing was performed according to standard ASTM D638 tensile and impact test using the Kolsky’s method. To know the distribution of foam that occur in the material, were observed using Scanning Electron Microscope instrument (SEM). To determine the stress distribution in this material, then conducted a computer simulation using Ansys. The best result obtained by the composition of this material based on material composition, which resin consumption can be reduced by the presence of BA as well as mechanical strength, good enough for molding. The best composition in this study will be used in subsequent studies, namely the design and manufacture of traffic cones from this material.
{"title":"INVESTIGATION OF MECHANICAL BEHAVIOR OF POLYMERIC FOAM MATERIALS REINFORCED BY OIL PALM EMPTY FRUIT BUNCHES (OPEFB) FIBERS DUE TO STATIC AND DYNAMIC LOADS","authors":"A. Zulfikar, B. Umroh, M. Y. R. Siahaan","doi":"10.31289/JMEMME.V3I1.2416","DOIUrl":"https://doi.org/10.31289/JMEMME.V3I1.2416","url":null,"abstract":"Polymeric composite foam with EFB fiber reinforced is new material that can be utilized as an alternative engineering material. EFB fiber utilization becomes the center of subject in this research. Moreover, these composites are unique with the presence of cavities (foam) in the matrix of unsaturated polyester resin. It results a decrease in density of the material that formed, and obtain a thermoset polymer composite material lighter than any else similar type. The objective of this study is to obtain the best manufacturing techniques of composite material, the mechanical behavior of these materials due to tensile static loading and high strain rate impact, and the distribution of foam that occur in the material that formed as a result of blowing agent (BA) from the type of polyurethane (PU). In this research, the sample formed into standard specimen of testing, such as ASTM D638 for static tensile test, and impact test specimen. Mechanical’s behaviors that are obtained in this research are density, tensile strength, modulus of elasticity (E), the incident stress, and dynamic modulus of elasticity of the material. For static testing was performed according to standard ASTM D638 tensile and impact test using the Kolsky’s method. To know the distribution of foam that occur in the material, were observed using Scanning Electron Microscope instrument (SEM). To determine the stress distribution in this material, then conducted a computer simulation using Ansys. The best result obtained by the composition of this material based on material composition, which resin consumption can be reduced by the presence of BA as well as mechanical strength, good enough for molding. The best composition in this study will be used in subsequent studies, namely the design and manufacture of traffic cones from this material.","PeriodicalId":102197,"journal":{"name":"JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127840432","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}
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