Nonlinear Buckling and Postbuckling Response of Porous FGM Shallow Spherical Caps and Circular Plates with Nonlinear Elastic Foundation Effects Using the Ritz Energy Method Authors Bui Tien Tu, Dang Thuy Dong, Vu Minh Duc & Vu Hoai Nam Publication year 2024 Index (WoS/Scopus) WoS Publisher Springer Journal Mechanics of Composite Materials Link https://link.springer.com/article/10.1007/s11029-024-10200-7