“…In the research fields of FG cylindrical shells without stiffeners, many studies have been addressed for the static buckling and postbuckling problems as Shen [38][39][40][41], Huang et al [42][43][44][45], Sofiyev [46], Dai and Zheng [47], Bagherizadeh et al [48], Akbari Alashti and Ahmadi [49], Sun et al [50] and Thang et al [51], Shahsiah and Eslami [52], Shen [53], Wu et al [54] and Yaghoobi et al [55]. Tornabene et al [56] investigated the recovery of through-the-thickness transverse normal and shear strains and stresses in statically deformed functionally graded (FG) doubly-curved sandwich shell structures and shells of revolution using the generalized zigzag displacement field and the Carrera Unified Formulation (CUF).…”