iosr-JMCE   Volume-14 ~ Issue-4 ~ July-Aug 2017

Abstract: The flux assisted GTAW or A-TIG process developed at the Paton welding institute. In this paper studied effect on depth of penetration and bead width by using different types of fluxes. Here we are including fluxes like Fe3O3, MnO2, CrO3, CaO, TiO2, MoO3 and SiO2. There are many forces affecting on high depth of penetration and narrow bead width, which are; Marangoni force, Lorentz or Electromagnetic force, Buoyancy force and Aerodynamic drag force. High depth of penetration and narrower bead width achieved using A-TIG welding. Here studied that DOP, bead width and D/W..........

Keywords: A-TIG welding, Bead width, Depth of Penetration, Flux, Marangoni effect.

[1] K.H. Dhandha, V.J. Badheka. "Effect of activating fluxes on weld bead morphology of P91 steel bead-on-plate welds by flux
assisted tungsten inert gas welding process" Journal of Manufacturing Processes 17, 2015, 48–57
[2] R.Kumar, S.R.Sundara Bharathi. "A Review Study on A-TIG Welding of 316(L) Austenitic Stainless Steel" IJETST- Vol. 02 Issue
03, 2015, 2066-2072

[3] K.H. Tseng , K-J Chuang, "Application of iron-based powders in tungsten inert gas welding for 17Cr–10Ni–2Mo alloys" Powder Technology 228, 2012, 36–46
[4] Cheng Hsien Kuo, Kuang Hung Tseng and Chang Pin Chou, "Effect of Activated TIG Flux on Performance of Dissimilar Welds between Mild Steel and Stainless Steel," Key Engineering Materials, Vol.479, 2011, 74-80
[5] Paulo J Modenesi, Eustaquio R. Apolinario and Iaci M. Pereira, "TIG welding with single component fluxes," Journal of Materials Processing Technology, vol.99 (1–3), 2000, 260–266.

Abstract: Aluminium Boron Carbide Metal Matrix Composites have revolutionized aeronautical and automobile industries, in the recent times due to their exceptional mechanical and physical properties. Their ability to be produced by conventional methods adds to the advantage. The aluminium matrix can be strengthened by reinforcing with hard ceramic particles like SiC, Al2O3 and B4C, etc. In the present work, attempt has been made to enhance the mechanical properties like hardness and tensile strength of AMCs by reinforcing AA6061 matrix with B4C particulates..........

Keywords: AA6061, B4C, Micro Hardness, Microstructure, Tensile

[1] R. Shivanath, P. K. Sengupta, and T. S. Eyre, Wear of aluminium-silicon alloys, Br.Foundrymen, 79, 1977, 349-356.
[2] N. Saheb, T. Laoui, A. R. Daud, M. Harun, S. Radiman and R. Yahaya, Influence of Ti addition on wear properties of Al-Si eutectic alloys, Wear, 249, 2001, 656-662.
[3] J. E. Gruzleski and B. M Closset, The treatment to Liquid aluminium silicon alloys, AFS, Illinois, 1990, 1-254.
[4] S. A. Kori, Studies on the grain refinement and modification of some hypoeutectic and eutectic Al-Si alloys, IIT Kharagpur, 2000.

[5] F.H.Stott, High temperature sliding wear of metals, Tribology International, 35, 2002, 489-495..

Abstract: Controlling the speed of motor in hybrid vehicles plays a key role in maintaining the stability and smoothness ofcar movement. In this paper a new methodology of digital internal model controller (DIMC) has been designed and tuned tomaintain a selective operating speed by optimizing the maximum overshoot and settling time. In this paper the performance of the proposed DIMC has been investigated and compared with other techniques such as PID controller, fuzzy PID, fuzzy PI, and observer based controller. The designed controller will enhance the performance of speed controlling of hybrid car which leads to an improvement in
fuel efficiency.

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Abstract: This paper examines the mechanical properties of the reinforcing steel bars used in the Nigerian Construction Industry. Tensile test were conducted to ascertain the tensile characteristics of the steel bars with regards to their level of conformity to the BS 4449: 1997 provisions. Four hundred and eighteen samples of bars from fourteen steel producing companies were used in the experiment and seven hundred and sixty test results obtained. It was found that eighty five percent of the samples tested fell short of BS 4449: 1997 provision. The research draws the attention of the regulatory bodies to the quality of reinforcing steel bars in the market. The study finally recommends that all imported reinforcing.........

Keywords: Steel bar, Tensile tests, BS4449:1975, Mechanical properties, Percentage elongation) Chukwudi, B.C and Onyeka, J.O.

[1] Alabi, A.G.F and Onyeji L.I; (2010) Analysis and Comparative Assessment of Locally Produced reinforcing steel bars for structural purposes; USEP – Journal of Research Information in Civil Engineering, vol. 7, no 2, 2010, p. 7
[2] American Society for Testing of Materials (2003): AASHTO No. M 31"Standard Specifications for Deformed and Plain Billet Steel Bars for Concrete Reinforcement":A615/A615M- 03a
[3] Amstead, B.H. (1987) - Manufacturing process. John Wiley and Sons Inc. Toronto,
[4] Arum, C. (2008): "Verification of Properties of Concrete Reinforcement Bars:- Nigerian Case Study" - Published by : http:ibe.sagepub.com PP.370-376
[5] Ayodele, E.O (2009): Collapse of Buildings in Nigeria – Roles of reinforcement; ContinentalJournal of Environmental sciences, vol. 3, Wilolud online journals, pp 1– 6.

Abstract: With the rapid development of micro-electric and computer technology, multi-UAV has drawn much attention. Multi-UAV has become an important research topic in recent years and the major domestic and foreign scientific research institutions, commercial companies, military institutions are carried thoroughly research to it.In this paper, the development process of multi-UAV are introduced and some representative research projects of multi-UAV at home and abroad are listed and the key technology of multi-UAV are summarized .Finally, the future development trend of multi-UAV are given.

Keywords: multi-UAV; the Status of the Current Research; the Trend of Development.

[1] Zhang Xin. Research on attitude and navigation information fusion algorithms for multi rotor UAV [D]. 2015:6-6 (Changchun Institute of optics, fine mechanics and Physics),
[2] Jiang Chengping. Design and implementation of a four rotor UAV control system [D]., Harbin Institute of Technology, 2014:6-8
[3] Li Chenglong. Research on flight stability control of multi rotor UAV at high altitude [D]., Zhejiang University, 2016:3-4.

Abstract: Seismic analysis is a subset of structural analysis which involves the calculation of the response of a structure subjected to earthquake excitation. This is required for carrying out the structural design, structural assessment and retrofitting of the structures in the regions where earthquakes are prevalent. The influence of diaphragm openings on the seismic response of multi-storeyed buildings played a major role in reducing the base shear, hence attracting lesser seismic forces. An attempt is made to try to know the difference between a building with diaphragm discontinuity and a building without diaphragm discontinuity.........

Keywords: Diaphragm Discontinuity, Earthquake Static Analysis (ESA), Response Spectrum Analysis (RSA), Base Shear, Storey Drift.

[1] Osama Mania1, Roshni J John, "Effect of Diaphragm Discontinuity on Seismic Response of Multistoreyed Building",International Journal of Emerging Technology and Advanced Engineering, ISSN 2250-2459, Vol. 5, No.12, pp. 130–135, 2015.
[2] P.P. Vinod Kumar, Dr. V.D. Gundakalle, "Effect of Diaphragm Openings in multi-storey RC framed Buildings using Pushover Analysis", International Research Journal of Engineering and Technology , ISSN 2395-0056, Vol. 2, No. 7, pp. 862–866, 2015.
[3] Rajesh Kadiyala, Tejaswi Kota, "Effect of Diaphragm Discontinuity of the Building", International Journal of Research in Engineering, IT and Social Sciences, ISSN 2250-0588,Vol. 6, No. 9, pp. 33–40, 2016.
[4] Babita Elizabath Baby, Sreeja S, "Analysis of Building with Slab Discontinuity", International Journal of Science and Research, ISSN 2319-7064, Vol. 5, No.9, pp. 999–1003, 2016.
[5] Kabade P P, Dr. Shinde D.N. "Effect of Column Discontinuity on Base Shear and Displacement of Structure", International Journal of Advancement in Engineering Technology, Management & Applied Science, ISSN 2349-3224, Vol. 1, No.2, pp. 133–140, 2014.

Abstract: The present paper involves the investigation of bending response of smart composite plates by using a new higher order shear deformation theory (HOSDT). A piezoelectric fiber reinforced composite materials are used as a distributed sensors or actuators to analyze the performance of the smart plates. A higher order shear deformation theory is proposed for piezoelectric laminated composite plates subjected to electromechanical loading. The displacement model is considered and the equations of equilibrium are attained by using the principle of virtual work and the solutions are evaluated with Navier's technique. The displacements and stresses due to bending are analyzed.

Keywords: Smart structures, Higher Order Shear Deformation Theory, Piezoelectric fiber reinforced composites, Principle of Virtual work.

[1] P.Ravikanth Raju,J.Suresh Kumar,M.V.Laxmi Prakash, Analysis of smart anti symmetric composite plates using HSDT, International Journal Of Engineering Research and Technology,3(11), 2014, 1352-1356.
[2] Tran Ich Thinh, Le Kim Ngoc, Static and Dynamic analysis of laminated composite plates with integrated piezoelectric s, Vietnam Journal of mechanics,30(1),2008,55-66.
[3] Shiuh-Chaun Her and Chi-Sheng Lin, Deflection of cross ply composite laminates induced by Piezoelectric actuators, Journal of SENSORS, 10,2010,719-733.
[4] Chee Zho Kam and Ahmad Beng Hong Kuch, Bending response of cross ply laminated composite plates with diagonally perturbed localized Interfacial degeneration, The scientific world journal ,2013,1-12.
[5] Tarun Kant and S.M.Shiyeakar, Cylindrical bending of piezoelectric laminates with a higher order shear and normal deformation theory, Journal of computers & structures 86,2008,1594-1603.

Abstract: In event of severe earthquakes R.C structures are subjected to lateral jolts. The behaviour of the structures towards seismic forces is dependent on the structural composition. Elevated water tanks are inverted pendulums with heavy mass suspended at the top supported by a slender staging. While chimneys are stack like structure having a slender cantilever fixed at the base, and R.C buildings frames consists of floor diaphragms of very large moment of inertia in the lateral direction connected with parallel rows of vertical columns which actually behaves as beam-columns under lateral seismic forces. In this paper an attempt shall be made to critically compare between the lateral seismic behaviour of three different structures using dynamic analysis procedure.

Keywords: Building frame, elevated water tanks, inverted pendulum, seismic behaviour, slender chimney.

[1] IS 1893 -1984, "Indian Standard Criteria for Earthquake Resistant Design of Structures", Bureau of Indian Standards, New Delhi, India
[2] IS 1893 (Part 2) 2014: "Indian Standard Criteria for Earthquake Resistant Design of Structures, Part: Liquid Retaining Tanks ",Bureau of Indian Standards, New Delhi, India
[3] IS 1893 (Part 4) 2005: "Indian Standard Criteria for Earthquake Resistant Design of Structures, Part 4,Industrial Structures Including Stack-..Like Structures", Bureau of Indian Standards, New Delhi, India.
[4] IS1893 (Part-I) (2002), "Indian Standard Criteria for Earthquake Resistant Structures, Part-I, General Provisions for Buildings", Bureau of Indian Standards, New Delhi, India.

Abstract: Vehicle deceleration is achieved by braking. For proper selection of material for braking application it becomes necessary to analyze the disc brake subjected to dynamic condition. The dynamic condition incorporates braking of vehicle considering effects of air on cooling characteristics of brake. CAD model of disc brake is developed in CREO 2 design package and analyzed in ANSYS mechanical software .The model is subjected to low speed and high speed testing using ANSYS CFX solver. On the basis of heat flux and maximum temperature obtained best material suitable for this application is determined. The results obtained from software is validated using experimental testing with lathe machine.

Keywords: Disc brake, thermal analysis, CFD, ANSYS, Transient thermal

[1] B. Breuer, K. H. Bill, Brake Technology Handbook (Warrendale, PA: SAE International, 1st English ed., 2008).
[2] Anderson A., Friction and wear of automotive brakes (Metals Handbook: Friction, Lubrication and Wear Technology, vol. 18, 1992, pp. 569–577).
[3] P. Dufrenoy, D. Weichert, A thermomechanical model for the analysis of disc brake fracture mechanisms, Journal of Thermal Stresses, 26(8), 2003, 815-828.
[4] S. Koetniyom. Thermal Stress Analysis of Automotive Disc Brakes, PhD thesis, University of Leeds, Leeds, 2000.
[5] P. Kinney, Cleanup: Improving Quadrilateral Finite Element Meshes, Technical Report., Ford Motor Company, Dearborn, MI, Feb 2008.

Abstract: Recently, the development in construction field due to nanotechnology materials had a significant inflection on the enhancement of concrete properties. Nano materials had become an important aspect for today's civil engineers. Among the nano materials presently used in concrete, nano-silica provides mechanical strength, impermeability, and durability to concrete. This unique characteristic is attributed to its high pozzolanic nature that gives it the ability to react with the fee-lime during hydration forming an additional C-S-H gel. In the present work, a different content of micro silica and nano silica as partial replacement of cement in Normal and High Strength Concrete mixtures were used. It was concluded that 8% micro silica and 2% nano silica as partial replacements of cement, improved compressive strength.........

Keywords: Nano Silica (NS); Silica Fume (SF); Compressive strength; Split tensile strength; Microstructure

[1] Balaguru P. and Chong k., "Nanotechnology and Concrete: Research Opportunities", 2006, Proceedings of ACI Session, November 7, 2006, Denver, USA.
[2] Ge Z., Gao Z.," Applications of Nanotechnology and Nanomaterials in Construction", 2008, First International Conference on Construction in Developing Countries (ICCIDC–I), August 4-5, 2008, Karachi, Pakistan.
[3] Birgisson B., Mukhopadhyay A. K., Geary G., Khan M., Sobolev K., " Nanotechnology in Concrete Materials A Synopsis", 2012, Transportation Research Circular E-C170, 500 Fifth Street, NW, Washington, D.C.
[4] Kawashima S., Hou P., Corr D. J., Shah S. P.," Modification of cement-based materials with nanoparticles", 2013, Cement & Concrete Composites 36 (2013) 8–15.
[5] Lone S. S., Gupta M., and Mehta G., "Comparative Study of Nano-Silica Induced Mortar, Concrete and Self-Compacting Concrete – A Review", 2016, Indian Journal of Science and Technology, Vol 9(44), November 2016.