Sharif Digital Repository

New developments have led to the creation of functionally graded materials which their unique property is continous changing in material properties. The increasing use of these materials has caused a lot of research on various issues related to them. One of the applications is applying these materials in spherical structures and open and closed rings. In mechanical equipment spherical structures and rings are used in various ways. The spherical structures of small parts, such as bearings to large structures such as spherical tanks are used. Due to the rapid growth of technology in the construction of structures of functionally graded materials, analysis of these structures in different...