iosr-JMCE   Volume-6 ~ Issue-3

Abstract: This paper describes the influence of steel fibre distribution on the ultimate strength of concrete beams. An experimental & analytical investigation of the behaviour of concrete beams reinforced with conventional steel bars and steel fibres under cyclic loading is presented. It is now well established that one of the important properties of steel fibre reinforced concrete (SFRC) is its superior resistance to cracking and crack propagation. As a result of this ability to arrest cracks, fibre composites possess increased extensibility and tensile strength, both at first crack and at ultimate load and the fibres are able to hold the matrix together even after extensive cracking. The net result of all these is to impart to the fibre composite pronounced post – cracking ductility which is unheard of in ordinary concrete. The transformation from a brittle to a ductile type of material would increase substantially the energy absorption characteristics of the fibre composite and its ability to withstand repeatedly applied, shock or impact loading. Tests on conventionally reinforced concrete beam specimens, containing steel fibres in different proportions, have been conducted to establish load-deflection curves. It was observed that SFRC beams showed enhanced properties compared to that of RC beams with steel fibres. The experimental investigations are validated with the analytical studies carried out by finite element models using ANSYS.

Keywords: Steel fiber, concrete, properties, crack, ductility, technology.

[1]. S. Pant Avinash1, R. Suresh Parekar (2010) "Steel fiber reinforced concrete beams under combined torsion-bending-shear" Journal of Civil Engineering (IEB) 38(1) 31-38
[2]. R.P. Dhakal and H.R. Song (2009) "Effect of bond on the behaviour of steel fibre reinforced concrete beams" ICI Journal, Vol. 1,No.4
[3]. Mukesh Shukla (2011)"Behaviour of Reinforced Concrete Beams with Steel Fibres under Flexural Loading" International Journal of Earth Sciences and Engineering ISSN 0974-5904, Volume 04, No 06 SPL, October, pp 843-846
[4]. Florian Finck(2010) "Acoustic Emission analysis of SFRC Beams under cyclic bending loads" Journal of Civil Engineering (IEB) 38(1) 21-28
[5]. Vengatachalapathy.V 1 , Ilangovan.R (2010 )"A Study on Steel Fibre Reinforced Concrete Deep Beams With and without Openings" International journal of civil and structural engineering, Volume 1, No. 3
[6]. Pant Avinash S, Parekar Suresh R(2009) "Steel Fiber Reinforced Concrete Beams Under Bending, Shear And Torsion Without Web Reinforcement" International Journal of Recent Trends in Engineering, Vol. 1, No. 6
[7]. I.J Sluys And R.De Borst (2010)"Computational modelling of impact test on steel fiber reinforced concrete beams" Journal of civil Engineering, Vol. 2, No.4
[8]. Hai H. Dinh and James K. Wight(2009) "Shear behavior of steel fiber-reinforced concrete beams without stirrup reinforcement" ISET Journal of Earthquake Technology, Technical Note, Vol. 44, No. 3-4
[9]. Hamid Pesaran Behbahani1, Behzad Nematollahi(2011) "Flexural behaviour of steel-fibre-added-rc (sfrc) Beams with C30 and C50 classes of concrete" Engineering structures ,Science Direct 37
[10]. Gustavo J. Parra-Montesano's(2010) "Shear strength of beams with deformed steel fibres" International journal of applied engineering research, Volume 1, no1

Abstract: The Laser cutting is a very important manufacturing technology. But this method has some disadvantages, among which we find the emergence of a Thermically Affected Zone ZAT can dramatically alter the characteristics of the processed material which affects its behaviour during its use. For this, we have tried in this article to study the effect of the forward speed and the laser power in this area (thickness, hardening). In this context, tests were made on steel C45 where we relied on the method of experiment plans to create a mathematical model Significant coefficients are obtained by carrying out a variance analysis ANOVA on the level of 5% of significance. We find that the speed in advance and the power of the laser have a great effect on the ZAT.

Keywords: Cutting, Laser CO2, Heat Affected Zone.

[1] Neila Jebbari, Mohamed Mondher Jebari, Faycal Saadallah, Annie Tarrats-Saugnac, Raouf Bennaceur, Jean Paul Longuemard (2007). "Thermal affected zone obtained in machining steel XC42 by high-power continuous CO2 laser". Optics and Laser Technology 40 (2008) 864-873.

[2] I.A. Choudhury, S. Shirley (2009). "Laser cutting of polymeric materials: An experimental investigation". Optics and Laser Technology 42 (2010) 503-508.

[3] Davim JP, Barricas N, Conceição M, Oliveira C. "Some experimental studies on CO2 laser cutting quality of polymeric materials". Journal of Materials Processing Technology 2008; 198 (1-3):99-104.

[4] J. Wang, W.C.K. Wong. "CO2 laser cutting of metallic coated sheet steels". Journal of Materials Processing Technology 95 (1999) 164-168

[5] Lv. Shanjin, Wang Yang. "An investigation of pulsed laser cutting of titanium alloy sheet". Optics and Laser in Engineering 44 (2006) 1067-1077.

[6] B. Tirumala Rao, Rakesh Kaul, Pragya Tiwari, A.K. Nath. "Inert gas cutting of titanium sheet with pilsed mode CO2 laser". Optics and Laser in Engineering 43 (2005) 1330-1348.

[7] Sivarao, T.J.S. Anand, Ammar, Shukor. "RSM Based Modeling for Surface Roughness Prediction in Laser Machining". Inetrnational Journal of Engineering & Technology IJET-IJENS Vol: 10 No 04.

Abstract: This Paper Reviews Briefly The Current Research On Sloshing And Its Effect In Liquid Carrier Tanker. The Aim Of This Paper To Study The Basics Of Sloshing And Its Prevention (Mainly In Liquid Carrier Tanker) The Liquid Sloshing Is Free Surface Fluctuation Of Liquid When Its Container Is Excited By External Vibrations Such As Earthquakes. The Liquid Sloshing May Cause Various Engineering Problem, For Example Instability Of Ships In Aero Engineering And Ocean Engineering, Failures On Structural Systems Of The Liquid Container. The Tanker Used For The Transportation Of Liquid Over The Road-Ways Is An Integral Part Of The Carrier/Vehicle. The Tanker Is Expected To Withstand The Unbalanced Forces On Account Of Transit Over Uneven And Irregular Surfaces/Contours Of The Road As Also Due To Sudden Acceleration Or Deceleration (Due To Application Of Brakes).

Keywords-Sloshing, Impact, Baffle, Simulation

[1]. Donald Liu "Tanker Spills Prevention By Design" National academic Press, Publication Year1991 ISBN-10: 0-309-04377-8 ,pp.208 to 213
[2]. Jean Ma and Mohammad Usman Jean "Modeling of Fuel Sloshing Phenomenon Considering Solid-Fluid Interaction" 8TH International LS-DYNA Users Conference Fluid/Structure
[3]. Ranjit Babar and V.Katkar "Simulation of Fuel Tank Slosh Test-Coupled Eulerian-Langrangian Approach" Tata Technologies, TATA motors Ltd. Pimpri, Pune
[4]. Kim Hyun-Soo and Lee Young-Shin "Optimization design technique for reduction of sloshing by evolutionary methods" Journal of Mechanical Science and Technology,Number1/January 2008,Vol.22
[5]. Jang-Ryong Shin and Kyungsik Choi and Sin-Young Kang "An Analytical Solution to Sloshing Natural Periods for a Prismatic Liquid Cargo Tank with Baffles" Proceeding of Sixteenth International Offshore and Polar Engineering Conference, California, USA, May 28-June 2, 2006