iosr-JMCE   Volume-8 ~ Issue-5

Abstract: An Abrasive Water Jet is one of the most recently developed non-traditional manufacturing processes. Abrasive water jet offers the potential for the development in cutting which is less sensitive to material properties, has virtually no thermal effects, and imposes minimal stresses. As it is a cold process has also important applications where heat-affected zones are to be avoided. In this work, a deep study of this newer non-conventional technique of machining i.e., abrasive water jet machining is done. In this paper more focus is on selection of various process parameters like-angle of impact, Pressure inside the pumping system, abrasive material type, Stand-off distance, focusing tube diameter, nozzle speed, abrasive mass flow rate and target material properties for getting the required output like- depth of cut and cut quality. For cutting Stainless steel (Grade 304), important task is to find out a few parameters which influence more. With the help of Analytical Hierarchy Process technique the selection of a few parameters are done which are comparatively more influencing. Weighteges are given to parameters on the basis of previous study and experience of owner of the company who is dealing with abrasive water jet technology since many years.

Keyword-AHP Technique, process parameter, Quality of cut, Weight ages.

[1] Janet Folkes, Waterjet—an innovative tool for manufacturing. Journal of Materials Processing Technology 209 (2009) 6181–6189. [2] Jan Valic, Experimental analysis of irregularities of metallic surfaces generated by abrasive waterjet, International Journal of Machine Tools & Manufacture 47 (2007) 1786–1790.

[3] R.Covasevic, Surface texture in Abrasive water jet cutting.

[4] A.A. Khan, M.M. Haque, Performance of different abrasive materials during abrasive water jet machining of glass. Journal of Materials Processing Technology 191 (2007) 404–407

[5] M. Chithirai Pon Selvan, and Dr. N. Mohana Sundara Raju, ―Analysis of surface roughness in abrasive waterjet cutting of cast iron‖. International Journal of Science, Environment and Technology, Vol. 1, No 3, 2012, 174 – 182

[6] Sanjay Kumar, Neeraj Parashar, Abid Haleem, Analytical Hierarchy Process Applied to Vendor Selection Problem: Small Scale, Medium Scale and Large Scale Industries ,Business Intelligence Journal - August, 2009 Vol. 2 No. 2

[7] Ahmet Hasc¸alık, ―A study on surface roughness in abrasive waterjet machining process using artificial neural networks and regression analysis method‖. Journal of materials processing technology 202 (2008) 574–582.

Abstract: In this paper, Control system performance, as a passive and active control on the example building under the Bam earthquake excitation, was studied. In order to passive and active control the structure TMD system mounted on the top floor of the building and FLC method was used, respectively. Active control system first applied to the lowest floor then to the highest point of the structure (applied to the TMD system). Mathematical model of the building is established in MATLAB. Equation of motion was written for high rise building and it was solved by state-space method, the Results are illustrated and compared.

Keywords : MATLAB; Active and Passive control; Fuzzy Logic Controller; Tuned Mass Damper

[1] Rahim Guclu, Hakan Yazici "Vibration control of a structure with ATMD against earthquake using fuzzy logic controllers"; journal of sound and vibration 2008, 318: 36-49

. [2] Kwan-Soon Park, Hyun-Moon Koh, Seung-Yong Ok "Active control of earthquake excited structures using fuzzy supervisory technique"; Advance in Engineering Software 2002, 33:761-768.

[3] M. S. Mahmud, M. Zribi, Y. C. Soh, "Optimal control of seismically-excited building structures", Computers and structures, 2000, 74: 521-533. [4] Hasan Alli, O˘guz Yakut, "Fuzzy sliding-mode control of structures", Engineering Structures, 2005, 27: 277-284

[5] S.Pourzeynali, H.H. Lavasani, A.H.Modarayi "Active control of high rise building structures using fuzzy logic and genetic lgorithms"; Engineering Structure 2007; 29 : 346-357.

[6] Bijan Samali, Mohammad Al-Dawod " Performance of a five-storey bench mark ,odel using an active tuned mass damper and fuzzy logic"; Eng. Structure 2003, 25 : 1597-1610.

[7] Clough RW, Penzien J. Dynamics of structures. 2nd. New York: McGraw-Hill; 1993.

[8] N. Yagiz, R. Guclu, I. Yuksek "Aktif kutlu sonumleyicili cok serbestlik dereceli bir yapinin depreme karsi LQR kontrolu", muhendis ve makine, say1: 2001, 498: 20-24 (In Turkish)

[9] Zhi Q. Gu, S. Olutunde Oyadiji "Application of MR damper in structural control using ANFIS method",Computers and structures, 2008, 86: 427-436

[10] A. Kumar, Poonam, B. Saini, V.K. Sehgal "Active vibration control of structures against earthquakes using modern control theory", civil engineering, 2007, vol 8: 283-299

Abstract: This work deals with fabricating or producing aluminium based metal matrix composite and then studying its microstructure and mechanical properties such as tensile strength, impact strength and wear behavior of produced test specimen. In the present study a modest attempt has been made to develop aluminium based MMCs with reinforcing material, with an objective to develop a conventional low cast method of producing MMCs and to obtain homogeneous dispersion of reinforced material. To achieve this objective stir casting technique has been adopted. Aluminium Alloy (LM6) and SiC, Fly Ash has been chosen as matrix and reinforcing material respectively. Experiment has been conducted by varying weight fraction of Fly Ash ( 5% and 15%) while keeping SiC constant(5%). The result shown that the increase in addition of Fly Ash increases the Tensile Strength, Impact Strength, Wear Resistance of the specimen and decreases the percentage of Elongation.

Keywords: Fly Ash, Hybrid Composites, Silicon Carbide, stir casting.

[1]. Basavaraju.S Arasukumar.K Dr.Chandrashekhar Bendigeri Dr.C.K.Umesh, Studies on Mechanical Properties and Tribological Characteristics of LM25- Graphite- Silicon Carbide and LM25-Flyash- Silicon Carbide - Hybrid MMC's, International Journal of Innovative Research in Science, Engineering and Technology Vol. 1, Issue 1, November 2012.
[2] Mahendra Boopathi, M., K.P. Arulshri and N. Iyandurai, Evaluation of Mechanical properties of Aluminium alloy 2024 reinforced with Silicon Carbide and Fly Ash hybrid metal matrix composites, American Journal of Applied Sciences, 10 (3): 219-229, 2013.
[3]. Mr. Amol D. Sable1, Dr. S. D. Deshmukh, Preparation of metal matrix composites by stir casting method, International Journal of Mechanical Engineering and Technology, Volume 3, Issue 3, September - December (2012), pp. 404-41.
[4] Er. Sandeep Kumar Ravesh , Dr. T. K. Garg, Preparation & Analysis for some mechanical property of Aluminium based metal matrix composite reinforced with SiC & Fly Ash, International Journal of Engineering Research and Applications, Vol. 2, Issue 6, November- December 2012, pp.727-731
[5] Shanmughasundara, R. Subramanian and G. Prabhu, Some Studies on Aluminium – Fly Ash Composites Fabricated by Two Step Stir Casting Method, European Journal of Scientific Research, ISSN 1450-216X Vol.63 No.2 (2011), pp.204-218.
[6]. H.C. Anilkumar , H.S. Hebbar and K.S. Ravishankar, Mechanical properties of Fly Ash reinforced Aluminium alloy(Al6061) composites, International Journal of Mechanical and Materials Engineering (IJMME), Vol.6 (2011), No.1, 41-45.

Abstract: The springs used in the bogie suspension of railway coaches are compression springs. They are made of an elastic wire material formed into the shape of a helix. They are commonly referred to as a coil spring or a helical spring. They are used to store energy and subsequently release it to absorb shock or to maintain a force between contact surfaces. The spring returns to its natural length or position when unloaded. Springs used in railway coaches have been failing prematurely much before their intended service life. The springs are made with quality materials. Before being put to service, the springs are tested with extensive Non Destructive Testing Methods which are approved by ISO standards to make sure that quality parts are used. However the springs still fail before their service life ends.

Keywords: chromium vanadium steel, , helical spring,design constrain , and analysis.

[1]. M. Senthil Kumar, S. Vijayarangan, "Design Optimization and Experimental Analysis of Composite Leaf Spring for Light Passenger Vehicles", Journal of Advances in Vibration Engineering, Vol 6, pp. 175-184, 2007.
[2]. Fundamentals of Materials Science and Engineering by William D. Callister.
[3]. Indian Railway Track Manual by R.S. Agrawal.

[4]. Gobbi, M., Mastinue, G.,"On the optimal design of composite tubular helical springs", Physics and Astronomy, Meccanica, Vol 36, pp. 525-533, 2001.

[5]. Coaching and Wagon by P.C. Gupta..

[6]. Machine Design by R.S. KHURMI, J.K. GUPTA.

[7]. Mechanical Engineering Design by Budynas−Nisbett.

[8]. Mechanics of Solids by T.J.Prabhu.

[9]. A Text Book of Design data hand book by S.Md Jaludeen.

[10]. A Text Book of Design data hand book by K.Mahadevan. K. Balaveera Reddy.