Thermal buckling analysis of functionally graded annular plate with variable thickness Qingshan Wang, Ruihua Wang, Xianlei Guan and Wen Shao Eur. Phys. J. Plus, 136 12 (2021) 1218 Published online: 07 December 2021 DOI: 10.1140/epjp/s13360-021-02107-2