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The effect of fiber volume fraction on tensile and impact properties of eleusine indica grass reinforced polypropylene bio composite

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IOP Conference Series: Materials Science and engineering 2019年第1期539卷

作者： I P Lokantara N P G Suardana I W Surata I N S Winaya Doctoral Study Program of Engineering Science Faculty of Engineering Udayana University Kampus Sudirman Denpasar-Bali Indonesia Mechanical Engineering Department of Udayana University Street of Bukit Jimbaran Badung Bali Indonesia

The purpose of this research was to investigate the tensile strength and impact strength of eleusine indica grass fiber-reinforced polypropylene recycle composite. In this study, the fiber was treated with alkali at 5% NaOH for 2 hours. The eleusine indica grass fiber cut with a length of 3 cm and the matrix used recycle polypropylene. In this research, the volume fraction of eleusine indica grass fiber varied by 20%, 25%, and 30% respectively. The composite molded with a hot press at temperature 200°C with a holding time for 2 hours. Tensile test used ASTM D3039 and impact test used ASTM D256. The highest tensile and impact strength results on fiber volume fraction 30%.

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Conformai mapping applied to the estimate of Surge and Swab geopressures

Conformai mapping applied to the estimate of Surge and Swab ...

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International Conference on Environment and Electrical engineering (EEEIC)

作者： Uyara F. Silva I. Q. Manoel Alan H. F. Silva Wesley P. Calixto Santiago Lemos Geovanne P. Furriel School of Electrical Mechanical and Computer Engineering Federal University of Goias (UFG) Goiania Brazil Experimental and Technological Research and Study Group (NExT) Federal Institute of Goias (IFG) Goiania Brazil Universidade Federal de Goias Goiania GO BR Program in Electronic Systems and Automation University of Brasilia (UnB) Brasilia Brazil Teaching and Research Center Applied to Education Federal University of Goias (UFG) Goiania Brazil

ISBN: (纸本)9781509023219

The purpose of this work is to calculate Surge and Swab pressure in oil wells with eccentricity between drill string and wellbore or casing string. Analysis of this phenomenon, in which the fluid is confined between two eccentric cylinders, are made. The conformal mapping is used to lead the eccentric domain into the concentric domain, since the usual models correspond to concentric geometries. The results of this study, using the proposed methodology, are presented and discussed.

关键词： Surges Geometry Stress Conformal mapping Mathematical model Indexes Liquids

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Seagoing aspects of large rocket technology

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Naval Engineers Journal 1965年第N 5期v 77卷 p787-792页

作者： Watson, N.E. The author received his B.S. degree in Mechanical Engineering from Illinois Institute of Technology and has a B.S. equivalent in Electrical Engineering obtained in Navy Ship and Air Electronic Schools including Shipboard Fire Control Gear Radar Sonar Air and Sea Navigational equipment. Mr. Watson's professional engineering experience encompasses 23 years of design development and project engineering of specialized materials handling equipment electrical and hydraulic controls automated machining equipment submarine nuclear power systems fire control systems and electronic and mechanical AGE for ballistic missile systems. He participated in the systems engineering and preliminary design of Thor Atlas Nike-Zeus Ballistic Missile Target Program and Minuteman Ballistic Missile Systems. He has participated in numerous advanced study programs for ballistic missile and space systems.

Article deals with use of water flotation for transportation and launch of large rocket vehicles and for downrange recovery of large boosters;it also discusses special types of ships necessary for offshore or sea launch, and servicing;comparison of operational methods is simplified by considering configuration of two-stage Sea Dragon, 1,000,000 lb-plus payload vehicle weighing 80,000,000 lb at liftoff and 3,900,000 lb dry;assembled rocket is 75 ft in diam and 500 ft long.

关键词： Rockets and missiles

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Comparative analysis combustion chamber cleaners use carbon cleaner on performance engine type 16 3SZ-VE IL,-4 cylinder valve, DOHC,VVT-i, 1500cc Daihatsu Astra cars

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Journal of Physics: Conference Series 2020年第5期1477卷

作者： A Rosyidin Y Effendi Efrizal Amir Mechanical Engineering Study Program University of Muhammadiyah Tangerang Jl. Perintis Kemerdekaaqn I No.33 Cikokol Kota Tangerang Banten 15118 Indonesia

Car transportation tools are widely used in Indonesia. The car is experiencing rapid technological development, including a family car made by Daihatsu astra with 1500 Cc. Engine Type 16 3SZ-VE IL,-4 Cylinder Valve, DOHC,VVT-I) (Toyota New Avanza type Veloz, Toyota New Avanza type G, Toyota Rush and Daihatsu Terios, production is much loved by the public 2012-2015, because it is loaded with many people affordable prices but has sophisticated technology so it is comfortable when driving. affordable prices but has sophisticated technology so it is comfortable when driving. As you use, the longer the car will experience a decrease in performance, this is caused by the engine combustion chamber experiencing crust, which results from incomplete combustion and poor fuel quality then care needs to be taken so that the car remains in top shape, Toyota's official workshop has a new innovation that is the engine combustion chamber cleaner using Camber Cleaner. Toyota's official workshop has a new innovation that is the engine combustion chamber cleaner using Camber Cleaner. The performance of the car will be excellent after the engine combustion chamber is cleaned using Camber Cleaner, The performance of the car will be excellent after the engine combustion chamber is cleaned using Camber Cleaner, many effects such as better acceleration, more efficient fuel, the combustion chamber will remain clean so that the combustion results released into the air will be less harmful material contentmany effects such as better acceleration, more efficient fuel, the combustion chamber will remain clean so that the combustion results released into the air will be less harmful material content. This also helps reduce air pollution caused by the large number of motorized vehicles.

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Percentage reduction analysis of flow stress of steel AISI 1006 by finite element method

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AIP Conference Proceedings 2021年第1期2384卷

作者： Destri Muliastri Slamet Sutjipto Febby Fauziah Program Study of Manufacturing Prosess Departement of Mechanical Engineering Politeknik Negeri Bandung Jalan Gegerkalong Hilir Ds. Ciwaruga Bandung West Java Indonesia

Wire drawing is a cold working process, metal working under recrystallization temperature to reduce the cross- sectional area of a wire without reducing the mass and volume of the wire. The purpose of this study is to determine the effect of percentage reduction on the flow stress of AISI 1006 steel wire. The method of this study is to compare the flow stress of AISI 1006 steel wire on the simulation results of ANSYS Workbench 19.0 and the theoretical calculation results of AISI 1006 steel with different percentage reduction. The specimens used in this study were AISI 1006 steel wire with a reduction percentage of 14.27%, 7.84%; 22.56% and 17.36%. The wire is pulled through the dies at an angle of 12 °. The results obtained from this study were 394.85 Mpa; 362.08 Mpa; 403.56 Mpa and 408.10 Mpa in simulation, while theoretically 380.83 Mpa; 325.00 Mpa; 392.69 Mpa and 401,392 Mpa.

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A Review: Gravitational Water Vortex Power Plant

A Review: Gravitational Water Vortex Power Plant

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International Conference on Sustainable Energy engineering and Application (ICSEEA)

作者： Reza Huwae Henny Sudibyo Ridwan Arief Subekti Anjar Susatyo Deni Shidqi Khaerudini Program of Study Magister in Mechanical Engineering Mercu Buana University Jakarta Indonesia Research Centre for Electrical Power and Mechatronics Indonesian Institute of Science (LIPI) Bandung Indonesia Research Centre for Electrical Power and Mechatronics Indonesian Institute of Sciences Bandung Indonesia Universitas Indonesia Gedung F Fakultas MIPA Kampus UI Depok Depok Jawa Barat Indonesia Research Center for Physics Indonesian Institute of Science (LIPI) Serpong Indonesia

ISBN: (数字)9781728188492

ISBN: (纸本)9781728188508

Significant population and economic growth, caused increasing of energy demand. Depletion of fossil fuel moreover coupled by climate change issue that caused by increasing carbon emission, become necessity to continuously encourage achieving renewable energy mix in energy primer. Large potentials of hydro renewable energy source and small utilization of it, micro-hydro and pico-hydro power plant are suitable to develop especially in country side. The research gap in the current turbine application chart is a challenge for Gravitational Water Vortex Power Plant (GWVPP) strong existence in pico-hydro power, besides conventional turbine design has been developed into it. However, development in vortex flow and basin geometry design has a robust design for the past 10 years of research. Researches have been conducted in few countries that proofed GWVPP has less capital investment and low operational and maintenance cost, however the parameter of the GWVPP still need further development since the power output efficiency still low. Since basin opening and outlet diameter are the main parameters to define basin geometry, inlet channel need to do further research. The research will improve the recent gaps; therefore, vortex turbine could be developed accordingly that would result immediate improvements for renewable energy growth in Indonesia through GWVPP.

关键词： Turbines Renewable energy sources Orifices Blades Geometry Picohydro power Water resources

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Design gearbox transmission Picohydro for hybrid floating power plant

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AIP Conference Proceedings 2023年第1期2772卷

作者： Tito Shantika Farkhan Firdauzy Yusuf M. Roedal Patriot Eka Taufiq Firmansyah 1Mechanical Engineering Study Program Institut Teknologi Nasional Bandung - INDONESIA Jl. PKH. Hasan Mustapa No. 23 Bandung 40124

The Hybrid Photovoltaic Picohydro power plant is an alternative power plant that is being developed, where the power plant consists of two sources of electricity, from solar and hydro energy. Picohydro was designed with a single axis shaft generator with turbine rotors, but both components have the same rotational speed. It's needed to use reduction gear for the appropriate speed generator specifications used. This research will achieve the picohydro power transmission system. Design gearbox will be in accordance with the specification of the generator. The study began with the design of gearbox components and then proceeded with the manufacturing process. The design of the components will use FEA software. The results have transmission shaft 8 mm dimensions, with a transmission ratio of 2.5 using bevel gear, Pinion gear maximum stress about 296.7 MPa, with material S45C obtained a FOS of 1.78.

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Virtual laboratory learning media development to improve science literacy skills of mechanical engineering students on basic physics concept of material measurement

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Journal of Physics: Conference Series 2018年第1期1013卷

作者： E D Jannati A Setiawan P Siahaan C Rochman Mechanical Engineering Study Program Majalengka University Majalengka Indonesia Mechanical Engineering Education Universitas Pendidikan Indonesia Bandung Indonesia Physics Education Universitas Pendidikan Indonesia Bandung Indonesia Physics Education UIN Sunan Gunung Djati Bandung Indonesia

This study aims to determine the description of virtual laboratory learning media development to improve science literacy skills of mechanical engineering students on the concept of basic Physics. Quasi experimental method was employed in this research. The participants of this research were first semester students of mechanical engineering in Majalengka University. The research instrument was readability test of instructional media. The results of virtual laboratory learning media readability test show that the average score is 78.5%. It indicates that virtual laboratory learning media development are feasible to be used in improving science literacy skill of mechanical engineering students in Majalengka University, specifically on basic Physics concepts of material measurement.

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Measurement analysis of the level of household preparedness for facing landslide in Bogor regency

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IOP Conference Series: Earth and Environmental Science 2021年第1期708卷

作者： P D Saputra C Rahmawati K S H Purnomo E Larosa Nurhasanah Military Building Construction Engineering Study Program Faculty of Military Engineering Indonesia Defense University Bogor Indonesia Industrial Engineering Department Faculty of Industrial Technology Universitas Dirgantara Marsekal Suryadarma Jakarta Indonesia Master of Management Program Universitas Teknologi YogyakartaYogyakarta Indonesia Mechanical Engineering Education Faculty of Teacher Training and Education Universitas Negeri Yogyakarta Yogyakarta Indonesia Civil Engineering Study Program School of Engineering & Technology Tanri Abeng University Jakarta Indonesia

There are so many areas in Indonesia that are prone to landslides. Bogor is the regency with the most frequent landslides. Therefore, high community preparedness is needed to deal with the landslide, especially at the household level because it is the spearhead of preparedness and influence disaster risk. The objective of this research is to measure and analyze the level of household preparedness for facing landslide. The location of this research is in Cibadak Village, Bogor regency where a landslide disaster had happened. This is a quantitative research. The number of the samples were 100 household. Data collection was done by surveying samples and distributing questionnaires. The data would be analyzed with descriptive analysis, and the results of level of household preparedness would be categorized to five levels which were very prepared (80-100), prepared (65-79), almost prepared (55-64), less prepared (40-54), and not prepared (0-39). The results of the research are the average index value of Knowledge and Attitude (KA) parameter is 66.77, Emergency Planning (EP) parameter is 52.24, Warning System (WS) parameter is 64.80, Resources Mobilization Capacity (RMC) parameter is 51.25 and the level of household preparedness for facing landslide is 59.26 or and it is significant at the almost prepared level.

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COST-ANALYSIS OF OPTIONAL METHODS OF SHIPBOARD DOMESTIC WASTE-DISPOSAL

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NAVAL ENGINEERS JOURNAL 1973年第1期85卷 86-92页

作者： PIERSALL, CH BORGSTRO.RE USN CDR Charles H. Piersall Jr.USN graduated from the New York State Maritime College in 1956 with the Bachelor of Marine Engineer's Degree. He was designated Engineering Duty Officer (1400) in June 1958 and has had numerous engineering and industrial tours of duty. He has a Master's Degree in Mechanical Engineering from the Naval Postgraduate School (1965) and a Master's Degree in Business Administration (Systems Analysis) from the Defense Systems Analysis Program University of Rochester (1970). Upon completion of the latter he was ordered to The Center for Naval Analyses where he served as a cost analyst and shipbuilding/ship repair consultant. Additionally he was Project Officer for the Navy and the Environment Study. His present assignment is Director of Production Test and Integrated Logistic Support—LHA Project Naval Ship Systems Command. He is President of the CNA Sigma Xi Club and is active in the American Society of Naval Engineers. He has published articles in theASME Journal for PowertheJournal of the American Water Works Associationand theNaval Engineers Journal. Mr. Robert E. Borgstrom was graduated from the California State University at Northridge with a B.A. (1969) and an M.A. (1970) in Geography. He was Manager of Programming Services at the Laboratory for the Quantitative Analysis of Environmental and Spatial Systems and is presently with the Office of the Chief of Naval Operations assigned to the Center for Naval Analyses where his work has included studies of the Navy's program for environmental protection.

The problem of sewage and waste disposal from U. S. Navy ships is recognized by the highest authorities in the Navy. Many activities and individuals are deeply involved in the total problem and its numerous subcategories. The problem of costs of disposal is one of these. This paper discusses four optional methods for the disposal of shipboard domestic wastes. The annualized investment and operating costs associated with the implementation of each of the options are presented. The model considers non-nuclear, sea-going surface ships with a manning level greater than 50 men. Estimates were developed on a per ship per class basis and aggregated for the total surface fleet. This approach permits the inevstigation of different combinations of the options by merely specifying the number and type of ships to be considered in any option. Changes in military effectiveness, which is at least an equally important problem as costing, were not addressed.

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