An efficient method to improve the stability of submerged functionally graded cylindrical shell
- 67 Downloads
An efficient method is presented to improve the stability of a submerged functionally graded (FG) cylindrical shell which is subjected to external hydrostatic pressure. To improve stability while satisfying the application requirements for shell thickness, we focused on the optimum value of the power-law exponent to maximize the critical hydrostatic pressure. The optimum value of the power-law exponent is obtained from an analysis of the influence factors on critical pressure. The results show that the critical pressure can be greatly increased by using the optimum value of the power-law exponent, and the growth rate of critical pressure is almost constant independent of the shell geometry and boundary condition. The advantage of the present method in reducing the shell thickness is illustrated by examples. In addition, the present method is applicable to all kinds of material combinations.
KeywordsPower-law exponent Critical pressure Functionally graded materials Cylindrical shell Shell thickness
Unable to display preview. Download preview PDF.
This work was supported by the National Natural Science Foundation of China (Contract Nos: 51105132 and 11402077) and the Doctoral Scientific Research Foundation of Henan University of Science and Technology (Contract No: 4007-13480032).
- M. C. Junger, Vibrations of elastic shell in a fluid medium and the associated radiation of sound, J. of Applied Mechanics, 19 (1952) 439–445.Google Scholar
- R. Li, B. Liang, N. A. Noda, W. Zhang and H. Y. Xu, Study on vibration of functionally graded cylindrical shells subjected to hydrostatic pressure by wave propagation method, Journal of Ship Mechanics, 17 (1–2) (2013) 148–154 (in Chinese).Google Scholar
- P. M. Morse and K. U. Ingard, Theoretical Acoustics, McGraw-Hill, New York (1968).Google Scholar
- M. R. Isvandzibaei, H. Jamaluddin and R. I. Raja Hamzah, Analysis of the vibration behavior of FGM cylindrical shells including internal pressure and ring support effects based on Love-Kirchhoff theory with various boundary conditions, J.of Mechanical Science and Technology, 28 (7) (2014) 2759–2768.CrossRefzbMATHGoogle Scholar