A new approach for nonlinear dynamic buckling of S-FGM toroidal shell segments with axial and circumferential stiffeners

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• 作者：Pham-Toan Thang^a ; ^b ; ^{phamtoanthang@tdt.edu.vn" class="auth_mail" title="E-mail the corresponding author} ; T. Nguyen-Thoi^a ; ^b
• 关键词：Nonlinear dynamic buckling ; S-FGM toroidal shell segments with metal&ndash ; ceramic&ndash ; metal layers ; The classical shell theory ; Elastic foundations
• 刊名：Aerospace Science and Technology
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：53
• 期：Complete
• 页码：1-9
• 全文大小：647 K

文摘

This paper presents an analytical approach to study the nonlinear dynamic buckling of sigmoid functionally graded material (S-FGM) toroidal shell segments surrounded by elastic foundations subjected to axial compression. Shells are reinforced by closely spaced rings and stringers. The nonlinear dynamic buckling analysis is based on the classical shell theory with von Kármán–Donnell-type of geometrical nonlinearity. By using the Galerkin method, the closed-form expression of the deflection–time curves is obtained. Numerical solutions are presented in tabular and graphical forms to investigate the deflection–time curves of FGM shells surrounded by elastic foundations. Finally, the influences of geometrical parameters, volume fraction index, elastic foundations, and the effectiveness of stiffeners on the nonlinear dynamic buckling of the S-FGM toroidal shell segments are discussed. The present results are compared with the available data for a special case.