iosr-JMCE   Volume-16 ~ Issue-3 ~ May-June 2019

Abstract: The main focus of this work is to design, manufacture and test a light weight aircraft wing strut having a pot-welded end fittings. This was designed against a compressive load of 2.6KN and a maximum deflection of 5mm. The work also covers the study of the mechanical behavior of the spot-welded end fittings fixed to the strut. It also conveys a comparative analysis between the experimental results and the mathematical analysis for failure of the members during testing. The major problem addressed by this study is that; during flight, the struts are subjected to tensile forces due to lift (upward forces) which acts on the wings of the aircraft. And during landing, the struts experiences compressive forces. Therefore, in order to overcome this, an investigation on tensile and compressive.........

[1]. U. o. Sheffield, "Advanced Experiments and Modelling (Solids) lecture note 2," 2016.
[2]. M. C. a. Z. J.J, "Ultimate Factor of Safety for Aircraft and Spacecraft- History, Definition and Application," 2014..

Abstract: The purpose of this study is to investigate the effects of Reynolds number (Re) and Cone angle (2θ) on the Pressure Recovery Coefficient (PRC) of the diffuser. It also borders on comparing the advantages and disadvantages of the theoretical, experimental and computational analysis of a diffuser with different cone angles. The above aims, were achieved by performing experimental , computational and theoretical analysis on a given diffuser for three different cone angles (In this case; 5º, 24º and 60º). This was done in order to verify and select the cone angle that has the best optimal Pressure Recovery Coefficient (PRC) and to know the relationship between the PRC for Theoretical, Experiment and CFD for a given diffuser. The basic reason behind this is to improve diffuser performance which is a function of Pressure Recovery Coefficient (PRC) and thus, increase efficiency and useful work of the entire system for which the diffuser is a component

Keywords: CFD, Reynolds, cone angle, diffuser, PRC, Analysis

[1]. John D. Anderson, JR. Department of Aerospace Engineering, University of Maryland" Computational Fluid Dynamics the basics with applications" International edition,1995
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[3]. R.Prakash et al, "CFD Analysis of Flow through a conical exhaust diffuser" InternationalJournal of Research in Engineering and Technology, 2014
[4]. E. Karunnakaran and V Ganesan " Mean Flow Field Measurements in an AxisymmetricConical diffuser with and without inlet Flow distortion" Indian Journal of Engineering and Materials Science
[5]. Dr. Alberto Marzo, Department of Mechanical Engineering, University of Sheffield. Lecture notes " MEC6016 Fluids: CFD in a nutshell 1 & 2".

Abstract: This report demonstrates and verifies the best appropriate method to be used in vibration excitation and response of simple and complex structural systems. The aim was to investigate which method is best for design purposes. Three components were investigated. The simple and complex systems (components) studied in this work are; flexible beam, rectangular plate and steam turbine blade. The methods used were; analytical, numerical and experimental methods from which the mode shapes and natural frequencies for comparison of results were obtained. This study is also aimed at finding frequency response functions, predicting and measur-ing first four natural frequencies and mode shapes, node locations, tip deflections and anti-node locations of the flexible beam. It also reveals.......

Keywords: Modal analysis, complex system, cantilever steam turbine blade, experimental Numerical vibration

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[3]. D. C. Lord, Lecture 2 – Modal Analysis and Modal Testing Part I and II, Sheffield: The University of Sheffield, 2016.
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Abstract: The project presents the investigation performed to find out the dynamic response of the turbine blade, which is in the 1st stage of manufacturing. According to engineering analysis, the blade has recorded some structural instability when approaching an operating speed of 5400 RPM. Failure in turbine fan blades is one of the most critical issues affecting the turbo machinery sector. Therefore, the resonant vibration of turbine blades plays a very crucial role in today's research works. This paper then investigates a modal analysis performed on the turbine fan blade and the natural frequencies are analysed. This report also discusses the measures and design modifications done in terms of material change, blade design change, which can be done in order to alleviate this instability occurring near maximum operating frequency of 90Hz. This numerical analysis is performed by a finite element method using ANSYS and the design modifications are carried out in Solid Works.

Keywords: Turbine, design, blade, dynamic response, modifications

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[2]. R. P. H. U. K. J. E.A. Ogbonnaya, "Analysis of Gas Turbine Blade Vibration Due to Random Excitation," Department of Marine/Mechanical Engineering, Niger Delta University, Nigeria., Nigeria.
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[5]. D. W. Herrin, " ANSYS Tutoria l- Vibro-Acoustic Design in Mechanical Systems," Department of Mechanical Engineering,
University of Kentucky, Lexington, 2012..

Abstract: The zone nearby the dam's heel is the most important part in strength evaluation of dam concrete. However, there occurs stress concentration phenomena in the zone nearby the dam's heel, where the strength of dam concrete cannot be evaluated by using the material mechanics method or finite element method. The paper proposes a method for evaluating the strength of dam concrete according to various strength criteria by using equivalent stress method and demonstrates its feasibility through the numerical experiments on the practical concrete gravity dam and concrete arch dam.

Keywords: concrete strength, dam heel, equivalent stress method, strength criterion, William-Warnke criterion

[1]. Novak, P., Moffat, A. I. B., Nalluri, C. and Narayanan, R., Hydraulic structures [M] (Taylor & Francis, 2007), 122-191
[2]. Chen, S. H., Hydraulic Structures [M] (Springer Press, 2015), 315+426-427. [3]. Fan S, Chen J, Guo J., Application of finite element equivalent stress method to analyze the strength of gravity dam[J]. Journal of Hydraulic Engineering, 6, 2007. 754-759+766, DOI：10.13243/j.cnki.slxb.2007.06.018.
[4]. Jiang, C. Y., Xu, C. C., Li, H. Equivalent stress calculation for gravity dam foundation surface based on ANSYS [J]. GX Water Resources & Hydropower Engineering, 1, 2011: 14-16. DOI:10.16014/j.cnki.1003-1510.2011.01.014
[5]. Yang, H. C., Jia, J. S., Zheng, C. Y. Study and application of the improved finite element equivalent stress method to analyze the strength of gravity dams [J]. Journal of China Institute of Water Resources and Hydropower Research, 11. 2013. DOI:10.13244/j.cnki.jiwhr.2013.02.009

Abstract: The objective of this research work is to study the structural behavior of "ribbon-type" floating bridges, and the effect of the type of joints connecting the pontoons on the ''load – carrying'' capacity of these floating bridges.The research presented here is mainly directed towards investigation of a newly proposed partial fixation joint, formed by rubber bumpers separated by a gap at the top of the pontoons, acting in conjunction to the standard steel hinge at the pontoons bottom. The analytical model and software package developed in a previous research work is extended to include the newly proposed partial-fixation joint. Emphasis is placed on the study......

Keywords: Floating Bridges, Partial-Fixation Joint, Bridge Strengthening, Stiffness Method, Virtual Work Method.

[1]. Wael M. Al-Badrawy, (2002) "Static and dynamic response of short span roadway bridge", M.Sc., Faculty of Engineering, Ain Shams University.
[2]. Shixiao Fu, Weicheng Cui, Xujun Chen and Cong Wang, (2005), "Hydroelastic analysis of a nonlinearly connected floating bridge subjected to moving loads " Marine Structures vol. 18 , 85-107.
[3]. Ehab M. Ebaied, (2006) "Analysis and design of floating bridges", PhD, Faculty of Engineering, Ain Shams University.
[4]. Shixiao Fu, Torgeir Moan, Xujun Chen and Weicheng Cui, (2007), "Hydroelastic analysis of flexible floating interconnected structures" Ocean Engineering vol. 34, 1516-1531.
[5]. Hisham A. El-Arabaty,(2007), "Analysis of floating bridges under transverse current loading" Scientific journal of civil engineering , faculty of engineering , Alazhar university,January 2007.

Abstract: Proper drainage of the roadway is essential to highway safety. Drainage systems for roadways with gutters are designed to limit spread of water on the pavement. Excess water must be captured by curb and gutter inlets. To locate and size these inlets properly, designers need reliable information on their hydraulic performance. Hence, this study deals with the experimental investigation of the storm network drainage system efficiency by investigated of the effect of changing the size of inlets to the efficiency of the rainwater network. Three sizes of inlets will be used with radius (2.5cm, 3.75cm, and 5cm).in addition two types of inlets' widening (sudden and gradually widening ) was studied with radius (3.75cm).As it turns out, with increasing radius of the inlets the efficiency of discharge increases at a rate 17%. In additional dimensional analysis equation is built to get the total efficiency of system. Finally, all the results were on a high resolution and the error rate was only 7 % where the results.

Keywords: Hydraulics, inlet testing, water depth, drainage system, inlet efficiency, surface flow

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[3]. D.Y.PatilPrathisthan'sY.B.Patil Polytechnic, Akurdi, PatilJalindar (Civil and Environmental Research ) www.iiste.org ISSN 2224-5790 (Print) ISSN 2225-0514 (Online) Vol 1, No.1, [2011] Effects of Bad Drainage on Roads PatilAbhijit (Corresponding author
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Abstract: Abstract: Expansive soils are one of the major soil deposits along the coastal area of East Godavari District, Andhra Pradesh, India. Such soils are predominantly clayey soils or very fine silts exhibit swell-shrink behaviour when subjected to moisture changes and do not have enough strength for any type of construction work. In the process of improving, the engineering properties that means to improve bearing capacity, to increase in soil strength, and durability under adverse moisture conditions of expansive soils, an experimental investigation is carried out to..........

Keywords: Compaction, expansive soils, lime, unconfined compressive strength

[1]. Chen, F.H. (1988), Foundations on Expansive Soils, Elsevier Science, New York.
[2]. McKeen, R. G. (1988). " Soil Characterization Using Suction Measurements", Proceedings, 25th Paving and Transportation Conference, University of New Mexico, Albuquerque, N.M.
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[5]. Katti, R K, "Search for solutions to problems in black cotton soils, " India Geotechnical Journal,vol.9,.pp.1–8, 1979.

Abstract: On the face of the forthcoming energy crisis, vegetable oils have come back up as a promising supply of fuel. they're being studied wide due to their teeming availableness, renewable nature and higher performance once employed in engines. Several vegetable oils are investigated in compression ignition engine by fuel modification or engine modification. The vegetable oils have terribly high density and body, thus we've used the methyl radical organic compound of the oil to beat these issues. Their use in variety of karanja biodiesel in CI engines has given encouraging results. Karanja oil is non edible in nature and is out there copiously in Asian nation. associate degree experimental...........

Keywords: Karanja oil, blending, biodiesel, engine performance

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[5]. Kesari Vigya, Das Archana, Rangan Latha, Physico-concoction portrayal and antimicrobial action from seed oil of Pongamia pinnata, a potential biofuel harvest, Biomass and Bioenergy 34 (2010): pp. 108– 115...