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Effect of vegetable oils as cutting fluid on wear of carbide cutting tool insert in a milling process

IOP Conference Series: Materials Science and engineering 2020年第1期796卷

作者： Arya R. Nasution Z. Fuadi I. Hasanuddin R. Kurniawan University of Muhammadiyah Sumatera Utara Jalan Kapten Mukhtar Basri No.3 Medan Indonesia Graduated Study Program Department of Mechanical Engineering Universitas Syiah Kuala Jl. Tgk. Syech Abdurrauf No. 7 Darussalam Banda Aceh Indonesia

This research focusses on the effect of vegetable oils, i.e. crude palm oil (CPO) and coconut oil (CO), used as the cutting fluid on the wear of carbide cutting tool insert in a face milling process. The performances of the tool, in term of wear and the surface roughness of the workpiece, were investigated and compared to those resulting from a similar milling process but using conventional cutting fluid, which is a commercial soluble oil emulsion (SOE). The results show that at the spindle speed of 360 rpm and the feed rate of 80 mm/min, the tool wear was smaller in the case of CO than that in the case of CPO cutting fluid, which is 0.16 mm2 compared to 0.40 mm2, respectively. The tool worn area in these cases are still larger than that in the case of SOE, which is 0.09 mm2. However, at higher spindle speed of 490 rpm and feed rate of 80 mm/min, the smallest tool worn area occurred for the case of CO cutting fluid, which is 0.04 mm2, compared to 0.1 mm2 and 0.11 mm2 for the case of CPO and SOE cutting fluids, respectively. As for the workpiece, the achieved surface roughness, Ra, were relatively similar for all the evaluated cases.

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The Application of Fuzzy Logic Method in the Debtors Eligibility Assessment System of Microfinance Institution

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IOP Conference Series: Materials Science and engineering 2020年第1期879卷

作者： S L B Ginting M R M Rizky Y R Ginting Sutono Computer System Study Program Faculty of Engineering and Computer Science Universitas Komputer Indonesia Jl. Dipati Ukur 112-116 Bandung 40132 Indonesia. Department of Mechanical Engineering Universitas Riau Kampus Bina Widya KM 125 Simpang Baru Pekanbaru 28293 Indonesia.

Decision-making processes in determining loan eligibility are often subjective which leads to imprecise credit predictions. Due to inaccurate inquiry on prospective customers done by field survey officers of Bank Perkreditan Rakyat (BPR) Bandung City, it has experienced credit complications such as bad credits. Therefore, this study aims to help decision-makers in determining creditworthiness and preventing bad credits from occurring. To realize this solution, the study uses the Fuzzy Logic method to calculate the creditworthiness of each prospective loaner based on the inquiries done in the field survey. Fuzzy Logic is known to be a 'counting' methodology with varying words. In addition, it can implement human expertise into machine language with ease and adequately. Based on numerous testing performed, the results demonstrate a level of 90% in accuracy when inputting within the valid ranges of each fuzzy set and membership function. However, the level of accuracy is only based on the clarification result which is determined by a researcher and BPR director, not a general level of accuracy for other microfinance institutions. Nevertheless, the findings of this study prove the method has a high enough accuracy to support decision-makers in determining the loan eligibility of prospective loaners and through this application in the surveying process, survey workers can work more efficiently. Hence, in future has a higher chance of predicting bad credits from potential loaners.

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Air Jet Erosion study on Stir Casted Metal Matrix Composite Aluminum-SiC

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IOP Conference Series: Materials Science and engineering 2019年第1期547卷

作者： M. Longalayuk C. Ruskandi B. H. Setiamarga Materials Engineering Study Program Faculty of Mechanical and Aerospace Engineering Institute of Technology Bandung. Foundry Technology Department Bandung Manufacturing Polytechnics.

For equipment that operates in high-speed abrasive media, erosion will be the major factor for its failure. Metal Matrix Composite (MMC) Aluminum-Silicon Carbide has been developed for improving the lifetime for such application. In this research, MMC Al-SiC has been made using Al-7075 scrap with 5%, 10%, and 15% SiC powder addition. This MMC was manufactured using stir casting technique with 1% Magnesium addition. Optical metallography has been done to know the SiC distribution homogeneity. Erosion resistance of the MMC was studied using Air Jet Erosion Test with Alumina powder as abrasives. The microstructural study showed that MMC Al-SiC has been successfully manufactured although the SiC particle distribution has not been fully homogeneous yet. Air Jet Erosion Testing revealed that the addition of 5% SiC powder was optimal in increasing its erosion resistance. The SiC addition from 10 to 15% did not improve its erosion resistance significantly.

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Thermodynamic Analysis of Two-Phase Ejector as Expansion Device with Dual Evaporator Temperatures on Split Type Air Conditioning Systems

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IOP Conference Series: Materials Science and engineering 2019年第1期494卷

作者： M E Arsana I G B Wijaya Kusuma M Sucipta I N Suamir Doctoral Engineering Science study Program Faculty of Engineering Udayana University Denpasar Bali Indonesia Mechanical Engineering Department Bali State Polytechnic Bali 80364 Indonesia

This paper presents a numerical and experimental study of increasing the performance coefficient (COP) of split AC (SAC) by reducing compressor work and increasing cooling capacity. Two phase ejector as an expansion device with a new design of dual evaporator temperature used. numerical methods apply the mathematical model developed in the EES software that is applied. Thermodynamic analysis is carried out to achieve ASHRAE Standard requirements for a minimum SAC with COP application of 3.5. The SAC system is filled with R-290 as a thermal fluid medium. Based on the simulation results a numerical model of the ejector is then produced and installed in a modified SAC system of cooling capacity of at least 9000 BTU/hour. An experimental test was conducted to investigate the actual performance of the ejector and its effect on the performance of the SAC system. The results showed that the two phase ejector with the new design of the dual evaporator temperature system was successful. When compared to standard split air conditioners using capillary tube expansion devices the tested ejector system contributes around 35% of power savings. The COP of the system can reach 5.5 which accounts for 39% of the increase in performance.

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Magnetic properties of nanomagnetic material based on BaTiO3 and BiFeO3 with variation of temperatures and times of sintering

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Journal of Physics: Conference Series 2019年第1期1153卷

作者： D. Suastiyanti S. Yatmani M. Wijaya Mechanical Engineering Study Program Institut Teknologi Indonesia Puspiptek-Raya-Street SerpongIndonesia Electrical Engineering Study Program Institut Teknologi Indonesia Puspiptek-Raya-Street Serpong Indonesia Badan Pengkajian dan Penerapan Teknologi (BPPT) Serpong Indonesia

This research uses basic compound of BaTiO3 (BTO) and single phase multiferroic material BiFeO3 (BFO) with weight ratio of BTO: BFO = 2: 1 to produce multiferoic ceramic. The purpose of this research is to know magnetic properties of the ceramic which consists of BFO multiferroic material combined with BTO electrical material. Changes in magnetic properties will affect the quality of multiferroic materials. The process used sol-gel method using temperature and time of calcination of 350°C and 4 hours, then sintered at 700,750 and 800°C for 2, 4 and 6 hours respectively. The sample was characterized by XRD test with diffraction angle of 20°-100° and the machine was made in Phillips type of PW 1835. This test is to know types of phases. To know magnetic properties of sample, it was used Permagraph test. To know particle size, it was used Particle Size Measurement from Nano Instrument of Beckman Coulter DelsaTM. The results show that new phase is formed which is the dominant phase, Barium Bismuth Iron (III) Oxide (BaBiFe2O5) with the largest percentage (98,79%) obtained at sintering process with temperature of 750°C for 6 hours. Increasing the percentage of dominant phases is linier by increasing of magnetic properties of the sample. The highest value of magnetic properties among other coercivity of 247.1 kA / m, remanent of 0.275 Tesla and Saturation of 0.41 Tesla belongs to ceramic with condition of sintering temperature and time of 750°C and 6 hours . The smallest particle size is also obtained under the same conditions equal to the particle size of 54-57 nm.

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Preliminary study on Acoustical Characteristics of Sago Midrib Composite

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IOP Conference Series: Materials Science and engineering 2019年第1期619卷

作者： Asniawaty Kusno Sherly Asriani Kusno Kamil Nurul Jamala Department of Architecture Faculty of Engineering Hasanuddin University Indonesia Study Program of Architecture Engineering Faculty Khairun University Indonesia Mechanical Engineering Department Engineering Faculty Universitas Muslim Indonesia Indonesia

This research is a preliminary study on the use of sago midrib as an acoustic material. This study aims to determine the sago as acoustic material by measuring the absorption coefficient using (impedance tube method) of 100 Hz-1.6 KHz frequencies. The results of measurement were analyzed and compared with common acoustic material available on market as reference. From the measurement of the sago midrib composite, absorption coefficient has fluctuated from low to high frequencies as the absorption coefficient of reference material is found to be more stable.

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Linearization of two-state thruster models

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Journal of Physics: Conference Series 2020年第1期1490卷

作者： Dieky Adzkiya Hendro Nurhadi Teguh Herlambang Department of Mathematics Institut Teknologi Sepuluh Nopember Indonesia Center of Excellence for Mechatronics and Industrial Automation Research Center Institut Teknologi Sepuluh Nopember Indonesia Department of Industrial Mechanical Engineering Institut Teknologi Sepuluh Nopember Indonesia Study Program of Information Systems Universitas Nahdlatul Ulama Surabaya Indonesia

A thruster is a device used for station keeping, attitude control, in the reaction control system, or long-duration, low-thrust acceleration. Thruster is one of the main components in autonomous surface vehicle. In th...

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Stress analysis on the frame of peanut skin peeler using autodesk inventor software

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IOP Conference Series: Earth and Environmental Science 2019年第1期343卷

作者： Cipto K A Rahangmetan F Sariman Hariyanto S B Bahar M T Sapsal Departemen of Mechanical Engineering Faculty of Engineering Universitas Musamus Merauke Indonesia Civil Engineering Study Program Universitas Muhammadiyah Buton Indonesia Department of Agricultural Technology Hasanuddin University Makassar Indonesia

The framework of the peanut shelling machine functions as a supporting structure for the components of the peanut shelling machine, namely the top funnel, funnel retaining frame, the lid on the peeler shaft, pulley, sieve shaft, sieve, engine body. Frame material is mild steel equal leg angles size 45 x 45 x 5, yield strength is 3,002E + 04 psi and tensile strength is 5.004E + 04 psi. Skeletal strength analysis was carried out using the autodesk inventor professional 2015 software. The engine frame was given axial loading of 500 N, 600 N, 700 N, 800 N, 900 N, and 1000 N. The analysis results of the maximum stress occur at 1000 N loading, amount to 16.85 Mpy, and the maximum deformation occurs at 1000 N loading, amounting to 0.07727 mm.

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mechanical characteristics of marble powder composite materials reinforced Kenaf Fiber against static load

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IOP Conference Series: Materials Science and engineering 2019年第1期523卷

作者： N Fitriadi Lindawati I Ardiansyah Mechanical Engineering Study Program Politeknik Aceh Selatan Jl. Merdeka Komplek Reklamasi Pantai Tapaktuan Aceh Selatan Aceh Indonesia 23711

Kenaf fibre is one of the strongest natural fibres in the world today. For that purpose, the purpose of this study is to create a new composite of Kenaf fibres combined with marble waste powder. The incorporation of marble powders and Kenaf fibres using a matrix of a polyester resin type has never been done. Thus, this study aims to create and test various composite material composites (mixture of matrix, marble powder and Kenaf fibre) which will produce different mechanical properties and obtain good tensile strength in test specimens with several composition variations. Preparation of test specimens was carried out with 4 (four) compositions of matrix mix and marble powder that is 50:50, 60:40, 70:30 and 80:20 with the weight of Kenaf fibre fixed 2 gram. The largest tensile test value is 63,407 MPa, obtained from 80:20 composition with the largest E value 3.03 GPa. The largest compression test value is 33.49, obtained from the composition of 60:40 with the largest E value of 2.35 GPa. The largest bending test value is 19.80 MPa, obtained from the composition of 80:20 with the largest E value of 36.55 GPa. From the research results of the tensile test, compression test, and bending test which possess good value is between composition ratio 60:40 and 70:30.

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Managing laundry wastewater

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IOP Conference Series: Earth and Environmental Science 2019年第1期248卷

作者： N L Watiniasih I G H Purnama G Padmanabha I M Merdana I N G Antara Study Program of Biological Sciences Faculty of Mathematics and Natural Sciences Udayana University Laboratory of Integrated Material Engineering and Environmental Technology Udayana University Study Program of Public Health Faculty of Medicine Udayana University Faculty of Veterinary Science Udayana University Mechanical Engineering Study Program Faculty of Engineering Udayana University Jl. Raya Kampus UNUD Kampus Bukit Jimbaran Jimbaran Bali 80361 - Indonesia

Laundry services are emerging in every corner of Bali, particularly at suburban area, from cities to villages. These services help the community to ease their burden. However, the burden for the environment is increase. The wastewater from the laundries should be controlled, which should be handled natural ways. One way of reducing the dangerous chemical from the laundry wastewater can be done by Vertical-Sub-surface Flow Constructed Wetland system, using volcanic rocks as substrate of plant grow and the plant as filters. This study aimed to investigate the effectiveness of volcanic rock and Canna plants as a filter for the laundry wastewater. The volcanic rock as substrate for the plant grows was place in layers in a drum and the laundry wastewater was flowed. The parameter of wastewater laundry, such as TDS, BOD, COD and total phosphate were measured before and after treatment. The treatment was run for 6 weeks. The result shows that this system is effective that overall can reduce the parameter measured for 53.86%.

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