عنوان	Investigation of geometric nonlinear stability of sandwich functionally graded (SFGM) spherical shells under uniform external pressure using an analytical approach
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Geometric nonlinear stability,spherical shells,sandwich functionally graded materials,power-law functions,closed-form formula
چکیده	The geometric nonlinearresponse of spherical shells made of sandwichfunctionally graded material (SFGM) under uniform external pressure incor-porating the effects of transverse shear deformations is considered. Theequilibrium and compatibility nonlinear differential equations can besolved by using the modified interaction method. All of the equations aredeveloped based on the first-order shear deformation theory (FSDT). In thepresent study, the geometric nonlinear problem has been solved for spe-cial boundary conditions including movable and fixed clamped supports inthe meridional direction. A closed-form nonlinear load-deflection relation-ship is developed for SFGM shell which expresses the equilibrium path ofthe shell.
پژوهشگران	علیرضا هوشمند سروستانی (نفر اول)، محمدامین شاه محمدی (نفر دوم)، حمزه صالحی پور (نفر سوم)