iosr-JMCE   Volume-9 ~ Issue-4

Paper Type	:	Research Paper
Title	:	An On-Situ Study of Stability Analysis on Slopes Using Undrained Shear Strength Parameters
Country	:	India
Authors	:	Kayal R.
	:	10.9790/1684-0940911

Abstract: The slope stability problems in residual soil are receiving increasing attention in recent years. The stability of slope is one of the important criteria where consider worldwide for a wide range of engineering projects. The rainfall seems to be the most common cause for landslide in residual soil slope. After a period of continuous rainfall, soil becomes saturated and a wetting front is developed because of infiltration of rainwater into the ground and into the slope surface respectively. The objective of the paper is to find threshold slope based on undrained shear strength parameters.

Keywords: Landslide , Rainfall , Slope stability, Threshold slope , Undrained shear strength parameters.

[1] Fredlund D.G , "Slope Stability Analysis Incorporating the Effect of Soil Suction", University of Saskatchewan, Canada S7N 0WO,1987, 113-143.

[2] Lim .T. T., Rahardjo .H. Chang M .F and Fredlund D .G. , "Effect of Rainfall on matric suctions in a residual soil slope", Canadian Geotech Journal, vol-33,1996, 618-628.

[3] Fredlund D.G and Scoular R.E.G., "Using Limit Equilibrium Concepts in Finite Element Slope Stability Analysis", International Symposium on Slope Stability Engineering,1999.

[4] Gasmon J.M., Rahardjo H, and Leong E.C (2000), "Infiltration Effects On Stability Of A Residual Soil Slope", Computers And Geotechnics, Vol 26, 2000, 145-165.

[5] Manzari M.T and Nour M.A , "Significance Dilatancy In Slope Stability Analysis", Journal of Geotechnical and Geoenvironmental Engineering ASCE, 2000, 75-80.

[6] Rezaur .R .B. Rahardjo .H ., Leong .E .C., and Lee .T .T. , "Hydrologic behavior of residual soil slopes in Singapore" Journal of Hydrologic Engineering (ASCE), 2003 , 133-144.

[7] Jachong Kim, Sangseom Jeong, Seongwan Park and Jitendra Sharina , "Influence of rainfall-induced wetting on the stability of slope in weathered soil", Engineering Geology, 75(3-4), 2004, 251-262.

[8] Stark T.D, Choi H and McCone S , "Drained Shear Strength Parameters For Analysis Of Landslides", Journal of Geothchnical and Geoenvironmental Emgineering ASCE, 2005, 575-588.

[9] Hsin-Fu Yeh, Po-Hsun Chang , Jin-Fa Chan, ands Cheng-Haw Lee (2006), "Instability of unsaturated soil slopes due to infiltration" International symposium on Geohazards,Taiwan.

Paper Type	:	Research Paper
Title	:	Study of effect of process parameter setting on porosity levels of aluminium pressure die casting process using Taguchi Methodology
Country	:	India
Authors	:	Kulkarni Sanjay Kumar, J. K. Sawale, Sampath Rao
	:	10.9790/1684-0941217

Abstract: This paper discusses the study and examined effect of die casting process parameters on porosity in aluminium alloy SAE 308 by using Taguchi method. In any die casting industry porosity is a very serious problem faced by production department and also being an invisible defect it is not identified visually in running production. It is shown in this work that die casting parameters which are related with machine such as first phase speed, second phase speed, first phase length and injection pressure all have significant influence on porosity level. The quality assessment of the die casting part was based on porosity measurement. The experiment have been performed as per the combination of levels of different process parameters suggested by L9 orthogonal array and conformation experiments have been performed to validate the optimum levels of different parameters

Keywords: Aluminum casting, die casting, Taguchi Methodology, Design of Experiments, orthogonal array

[1] R.Monroe, Porosity in Casting, AFS Transactions American Foundry Society 2005
[2] Y.J. Huang, B.H. Hu, I. Pinwill, W.Zhou & D.M.R Taplin. Effects of process settings on the porosity levels of AM60B magnesium die castings : Materials and Manufacturing, 2009.
[3] K S Anastasiou, optimization of the aluminium die casting process based on the taguchi method. Journal of Engineering Manufacture June 3, 2011
[4] A.Nouri-Borujerdi, Analysis of vacuum venting in Die Casting: SCIENTIA IRANICA, October 2004.
[5] S.Thanabumrungkul, S.Janudom, R.Burapa. Industrial development of gas induced semi-solid process: Transactions of Nonferrous Metals Society of China: 25 June 2010.
[6] S.Thanabumrungkul, S.Janudom, R.Burapa. Industrial development of gas induced semi-solid process: Transactions of Nonferrous Metals Society of China: 25 June 2010.
[7] Imran Khan, YakovFrayman and Sacid Nahavandi: Modelling of porosity defects in high pressure die casting with a neural network. Journal of Materials Processing Technology, 2009.
[8] Drd. Ing, sorina Moica: Taguchi Experiment to establish the Process Parameters for Die Cast Aluminum Parts: Journal of inter- engineering 2009.
[9] G.O. Verran: DOE applied to optimization of aluminum alloy die castings: Journal of Materials Processing Technology 13 Aug 2007.
[10] Satish Kumar, Arun Kumar Gupta, Pankaj Chandna: Optimization of Process Parameters of Pressure Die Casting using Taguchi Methodology: International Journal of Mechanical and Industrial Engineering 2012

Paper Type	:	Research Paper
Title	:	Investigation of Tribological Behavior of Stainless Steel 304 and Grey Cast Iron Rotating Against EN32 Steel Using Pin on Disc Apparatus
Country	:	India
Authors	:	Kapil Chawla, Naveen Saini, Rajeev Dhiman
	:	10.9790/1684-0941822

Abstract: The tribological behavior of stainless steel 304 and grey cast iron was investigated using the pin-on-disc standard test with varying sliding speeds and normal loads. A pin-on-disc device with round tool inserts was used to conduct friction wear tests in which the linear wear of the tribo-pairs were continuously recorded versus sliding distance. For the quantitative comparison of the wear resistance of the material was tested by calculating the weight loss. Scanning electron microscopy (SEM) was applied for observations of wear scars and wear products, and the identification of the predominant wear mechanisms which occurred. Some specific frictional behaviors and relevant wear mechanisms observed for both steel 304 and cast iron sliding were highlighted and quantified. It was concluded that with the increase in sliding speed and normal load wear behavior shown by stainless steel 304 was more as it become soften with the increase in the load. But the wear behavior shown by grey cast was low due to the presence of graphite.

Keywords: Grey cast iron, Pin on disc, Scanning electron microscopy (SEM), Stainless steel 304, Weighing machine.

[1] I.A. Inman, S. Datta, H.L. Du, J.S. Burnell-Gray, Q. Luo, Microscopy of glazed layers formed during high temperature sliding wear at 750 0C, Wear 254 (2003) 461–467.

[2] J.E. Wilson, F.H. Stott, G.C. Wood, The development of wear protective oxides and their influence on sliding friction, Proc. R. Soc. A 369 (1980) 557–574.

[3] I.A. Inman, P.S. Datta, Development of a simple 'temperature versus sliding speed' wear map for the sliding wear behaviour of dissimilar metallic interfaces II, Wear 265 (2008) 1592–1605.

[4] S.Q. Wang, M.X. Wei, F. Wang, Y.T. Zhao, Transition of elevated temperature wear mechanisms and the oxidative delamination wear in hot-working die steels, Tribol. Int. 43 (2010) 577–584.

[5] A.R. Riahi, A.T. Alpas, Wear map for grey cast iron, Wear 255 (2003) 401–409.

[6] K. Hirasata, K. Hayashi, Friction and wear of several kinds of cast irons under severe sliding conditions, Wear 263 (2007) 790–800.

[7] B.K. Prasad, Sliding wear response of cast iron as influenced by micro structural features and test condition, Mater. Sci. Eng. 456 A (2007) 373–385.

[8] Y.C. Liu, The influence of surface oxidation on the wear resistance of cast iron, Tribol. Int. 28 (1995) 433–438.

[9] H.-S. Hong, The role of atmospheres and lubricant in the oxidational wear of metals, Tribol. Int. 35 (2002) 725–729.

[10] Dwivedi DK, Arjun TS, Thakur P, Vaidya H, Singh K. Sliding wear and friction behaviour of Al–18%Si–0.5%Mg alloy.Mater Process Technol 2004;152(3),323–328.