TY - JOUR
ID - 71822
TI - Exact Elasticity Solutions for Thick-Walled FG Spherical Pressure Vessels with Linearly and Exponentially Varying Properties
JO - International Journal of Engineering
JA - IJE
LA - en
SN - 1025-2495
AU - Atashipour, Seyed Rasoul
AU - Saidi, Ali
AU - Jomehzadeh, Emad
AD - Mechanical Engineering, Iran University of Science and Technology (IUS
AD - Mechainical Engineering, Shahid Bahounar university of Kerman
AD - Mechanical Engineering, Kerman Graduate University of Advanced Technology
Y1 - 2009
PY - 2009
VL - 22
IS - 4
SP - 405
EP - 416
KW - Thick
KW - Walled Pressure Vessels
KW - functionally graded materials
KW - Linearly
KW - Varying Properties
KW - Exponentially
DO -
N2 - In this paper, exact closed-form solutions for displacement and stress components of thick-walled functionally graded (FG) spherical pressure vessels are presented. To this aim, linear variation of properties, as an important case of the known power-law function model is used to describe the FG material distribution in thickness direction. Unlike the pervious studies, the vessels can have arbitrary inner to outer stiffness ratio without changing the function variation of FGM. After that, a closed-form solution is presented for displacement and stress components based on exponential model for variation of properties in radial direction. The accuracy of the present analyses is verified with known results. Finally, the effects of non-homogeneity and different values of inner to outer stiffness ratios on the displacement and stress distribution are discussed in detail. It can be seen that for FG vessels subjected to internal pressure, the variation of radial stress in radial direction becomes linear as the inner stiffness becomes five times higher than outer one. When the inner stiffness is half of the outer one, the distribution of the circumferential stress becomes uniform. For the case in which the external pressure is applied, as the inner to outer shear modulus becomes lower than 1/5, the value of the maximum radial stress is higher than external pressure.
UR - https://www.ije.ir/article_71822.html
L1 - https://www.ije.ir/article_71822_8aad44b8eacd2965d94e046ff532e21a.pdf
ER -