Non-Linear Wrinkling of a Sandwich Panel with Functionally Graded Core - Extended High-Order Approach
The non-linear response of a sandwich panel with the core that consists of a functionally graded material (FGM) undergoing in-plane loading is investigated. The panel consists of two face sheets, metallic or composite laminated, and an FGM core that is a medium whose mechanical properties change through the depth facilitating a desirable response of the structure. The effect of the FGM core is introduced through the constitutive relations that affect conventional and high-order stress resultants and stress couples in the panel. The formulation employs the Extended High-Order Sandwich Panel Theory (EHSAPT) to assess the effect of the FGM material of the core. A variational approach is adopted to derive the linear and non-linear governing equations with a prescribed FGM distribution through the depth of the core. The wrinkling study of FGM panels includes two loading scenarios where in-plane loads are applied through a rigid edge beam connected to the core only and where the loads are applied through a rigid edge structure attached to both the face sheets and core causing uniform end shortening. The post-wrinkling behavior is also considered to prove that the initial pattern of wrinkles is not affected.
Y. Frostig et al., "Non-Linear Wrinkling of a Sandwich Panel with Functionally Graded Core - Extended High-Order Approach," International Journal of Solids and Structures, vol. 148-149, pp. 122-139, Elsevier, Sep 2018.
The definitive version is available at https://doi.org/10.1016/j.ijsolstr.2018.02.023
Mechanical and Aerospace Engineering
Keywords and Phrases
Beams and girders; Buckling; Displacement control; Honeycomb structures; Laminated composites; Press load control; Rigid structures; Sandwich structures; Constitutive relations; Edge beam; Functionally graded materials (FGM); Non linear governing equations; Non-linear response; Sandwich panels; Variational approaches; Wrinkling; Functionally graded materials; Buckling; Displacement control; Extended high-order sandwich panel theory (EHSAPT); Load control
International Standard Serial Number (ISSN)
Article - Journal
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