IJSER Home >> Journal >> IJSER
International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 10    
Website: http://www.ijser.org
scirp IJSER >> Volume 2, Issue 10, October 2011 Edition
Modeling Anisotropy and Steady State Creep in a Rotating Disc of Al-SiCp having Varying Thickness
Full Text(PDF, 3000)  PP.  
Author(s)
Vandana and S.B. Singh
KEYWORDS
Modeling, Composites, Rotating Disc, Steady Strain Creep Rate
ABSTRACT
The analysis of steady state creep in a rotating disc made of Al-SiCp composite having variable thickness has been carried using Sherby's constitutive model. The creep parameters have been evaluated using the available experimental results in the literature using regression analysis. Three variations in the thickness (constant, linearly and hyperbolic varying thickness) of the disc have been considered while keeping other material parameters same. The change in the radial stress in all the three cases is not significant while the tangential stress is changed with the change in the values of anisotropic constants. The tangential strain rates are highest at the inner radius of the disc and then decreases towards the outer radius of the discs. The radial strain rate which is compressive in nature becomes tensile in middle of the disc for some specific values of anisotropic constants. The study reveals that the anisotropy and thickness profile has a significant effect on the creep behavior of rotating disc. Thus for the safe design of the rotating disc the effect of anisotropy and profile should be taken care of
References
[1] Wahl, A.M., Sankey, G.O., Manjoine, M.J. and Shoemaker, E. Creep tests of rotating risks at elevated temperature and comparison with theory. Journal of Applied Mechanics, 76, 225-235 (1954).

[2] Ma, B.M. A Creep Analysis of Rotating Solid Discs. J .of the Franklin inst, 267 (2), 167-168, (1959).

[3] Ma, B.M. A further creep analysis for rotating solid disks of variable thickness. Journal of the Franklin Institute, 269, 408-419 (1960).

[4] Sherby, O.D., Klundt, R. H. and Miller, A. K. Flow stress, subgrain size and subgrain stability at elevated temperature. Metallurgical Transactions, 8A, 843-850 (1977).

[5] Arya, V.K. and Bhatnagar, N.S. Creep analysis of rotating orthotropic disc. Nuclear Engineering and Design, 55, 323 (1979).

[6] Nieh, T.G. Creep rupture of a silicon carbide reinforced aluminum composite. Metallurgical Transactions, 15A, 139-146 (1984).

[7] Kulkarni, P.S., Bhatnagar, N.S. and Arya, V.K. Creep analysis of thin-walled anisotropic cylinders subjected to internal pressure, bending and twisting. Proceedings of the workshop on solid mechanics, 13-16 (1985).

[8] Bialkiewicz, J. Dynamic Creep Rupture of a Rotating disc of Variable Thickness. International Journal of Mechenical Science, 28 (10), 671-681 (1986).

[9] Bhatnagar, N.S., Kulkarni, P.S. and Arya, V.K. Steady State Creep of Orthotropic Rotating Discs of Variable Thickness. Nuclear Engineering and Design, 91, 121-141 (1986).

[10] Pandey, A.B., Mishra, R.S. and Mahajan, Y.R. Steady State Creep Behaviour of Silicon Carbide Particulate Reinforced Aluminium Composites. Acta. Metallurgica Materialia., 40(8), 2045-2052 (1992).

[11] Gupta, S.K., Sharma, S and Pathak, S. Creep transition in a thin rotating disc having variable thickness and variable density. Indian Journal of Pure applied Math., 31(10), 1235-1248 (2000).

[12] Singh, S.B. and Ray, S. Modeling the anisotropy and creep in orthotropic Al-SiC composite rotating disc. Mechanics of Materials, 34, 363-372 (2002).

[13] Orcan, Y. and Eraslan, A.N. Elastic-plastic stresses in linearly hardening rotating solid disks of variable thickness. Mechanics Research Communications, 29, 269-281 (2002).

[14] Gupta, V.K. Steady state creep and material parameters in a rotating disc of Al-SiCp composite. European Journal of Mechanics A/Solids, 23, 335-344 (2004).

[15] Jahed, H., Farshi, B. and Bidabadi, J. Minimum weight design of inhomogeneous rotating discs. International Journal of Pressure Vessels and Piping, 82, 35-41 (2005).

[16] Baykara, C. A comparison of stress concentrations in thin sheetswith plastic anisotropy. Journal of Reinforced Plastics and Composites, 26, 1455-1459 (2007).

[17] Singh, S.B. One parameter model for creep in a whisker reinforced anisotropic rotating disc of Al-SiCw composite. European Journal of Mechanics A/Solids, 27(4), 680- 690 (2008).

[18] Rattan, M., Singh, S. B and Ray, S. Effect of stress exponent of steady state creep in an isotropic rotating disc. Bulletin of Calcutta Mathematical Society, 101 (2009).

[19] Chamoli, N., Rattan, M. and Singh, S.B. Effect of anisotropy on the creep of a rotating disc of Al-SiCp composite. Indian Journal of Contemp. Math. Sciences, 5(11), 509 –516 (2010).

Untitled Page