An analytical approach for nonlinear global buckling behavior of sandwich cylindrical panels with multilayer corrugated CNT-reinforced core in thermal environment

Chúng tôi vui mừng thông báo rằng PGS.TS. Nguyễn Thị Phương và các đồng nghiệp đã xuất bản công trình có tựa đề “An analytical approach for nonlinear global buckling behavior of sandwich cylindrical panels with multilayer corrugated CNT-reinforced core in thermal environment” trên tạp chí Engineering Structures.

Tóm tắt:

This paper presents an analytical approach to the nonlinear global buckling responses of sandwich CNT-reinforced panels with multilayer corrugated CNT-reinforced core under axial compression and external pressure in thermal environment resting on nonlinear elastic foundations. The existing homogenization model of single-layer corrugated panels is improved for multilayer corrugated CNT-reinforced core, taking into account the thermal forces of uniform temperature change. The round and trapezoidal corrugation types of core layers are considered, and the CNT-reinforced composite is used for the core layers with suitable designs of CNT volume distribution laws. The governing equations are formulated using Donnell shell theory and considering the von Karman nonlinearities. The total potential energy expression can be established, and the Ritz energy method is applied to obtain the postbuckling load-deflection curves and critical buckling loads in explicit forms. The significant effects of corrugated core types, geometrical and material parameters of face sheets and corrugated core, nonlinear elastic foundations, and temperature change on the critical buckling loads and postbuckling curves of sandwich CNT-reinforced cylindrical panels are presented and discussed in numerical investigations.