Nonlinear Thermo-Mechanical Stability Analysis of Eccentrically Spiral Stiffened Sandwich Functionally Graded Cylindrical Shells Subjected to External Pressure

International Journal of Applied Mechanics - Tập 11 Số 05 - Trang 1950045 - 2019
Vũ Hoài Nam1, Nguyen Thi Phuong2,3, Cao Van Doan1, T. Nguyen‐Thoi2,3
1Faculty of Civil Engineering, University of Transport Technology, Hanoi, Vietnam
2Division of Computational Mathematics and Engineering, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam
3Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam

Tóm tắt

A new analytical approach to investigate the nonlinear buckling and postbuckling of the sandwich functionally graded circular cylindrical shells reinforced by ring and stringer or spiral stiffeners subjected to external pressure is presented in this paper. By employing the Donnell shell theory, the geometrical nonlinearity in Von Kármán sense and developed Lekhnitskii’s smeared stiffener technique, the governing equations of sandwich functionally graded circular cylindrical shells are derived. Resulting equations are solved by applying the Galerkin method to obtain the explicit expression of critical buckling external pressure load and postbuckling load–deflection curve. Effects of spiral stiffeners, thermal environment, external pressure, and geometrical parameters on nonlinear buckling behavior of sandwich functionally graded circular cylindrical shells are shown in numerical results.

Từ khóa


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