Topic
Sandwich panel
About: Sandwich panel is a research topic. Over the lifetime, 4665 publications have been published within this topic receiving 49812 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the failure modes arising from structural instability for single skin and sandwich panels in such combined thermal-mechanical condition are discussed, and analytical solutions for these mechanical failure modes are presented for design considerations.
20 citations
TL;DR: In this article, a higher-order theory for sandwich panels with non-rigid bond layers between the face sheets and the core is presented, and the central finite difference scheme is used for discretizing the continuous formulation, which reveals that the ordinary sandwich panel behaves as a compound structure in which the local/localized, overall or interactive forms of the response can take place depending on the geometry, mechanical properties and boundary conditions of the structure.
Abstract: Special features inherent in the response of ordinary (fully bonded) and delaminated sandwich panels with a transversely flexible (“soft”) core subjected to external in-plane and vertical statical loads are analyzed. The analytical formulation is based on a higher-order theory for sandwich panels with non-rigid bond layers between the face sheets and the core. The central finite difference scheme is used for discretizing the continuous formulation. The deflated iterative Arnoldi scheme for solution of a large-scale generalized eigenvalue problem is employed, as well as the quasi-Newton global framework for the natural parameter and the arc-length continuation procedures. The numerical higher-order analysis reveals that the ordinary sandwich panel behaves as a compound structure in which the local/localized, overall or interactive forms of the response can take place depending on the geometry, mechanical properties, and boundary conditions of the structure. The non-sinusoidal modes confined to the support zones of the panel may occur at critical loads much lower than those predicted on the basis of presumed sinusoidal modes. Soft-core sandwich panels possess a complex branching behavior with limit points and secondary bifurcations. The thin-film-delamination approach used in the field of the composite plates is unsuitable for the analysis of delaminated sandwich panels and consideration of the interaction between the face sheets and the core is required. The complex response of the soft-core sandwich panels can be predicted only with the aid of the enhanced higher-order theory.
20 citations
TL;DR: In this paper, a non-uniform electric field model is proposed for the smart control of large amplitude vibration of porous piezoelectric conical sandwich panels resting on nonlinear elastic foundation within the framework of von Karman type of geometrical nonlinearity and the first order shear deformation theory.
20 citations
Patent•
04 May 1990
TL;DR: A sandwich panel element comprises a core of fibrous material arranged between first and second parallel outer skins of generally planar sheet material as discussed by the authors, where the fibers are in a direction generally transverse to the planes of the sheet material.
Abstract: A sandwich panel element comprises a core of fibrous material arranged between first and second parallel outer skins of generally planar sheet material. The core material consists of a plurality of elongate strips arranged in side-by-side and end-to-end abutting relationship. The strips are formed so that the fibers are in a direction generally transverse to the planes of the sheet material. The strips are individually shorter than the length or width of the panel element and the mutually abutting ends of the strips are staggered with respect to rows of adjacent strips. The ends also may be chamfered at an acute angle to the longitudinal direction of the strips to allow the ends to overlap.
20 citations
TL;DR: In this paper, the authors presented the solution of symmetrical face sheet wrinkling problem for sandwich panel with composite facings and an orthotropic core, which takes into account compressive and shear stiffnesses as well as nonlinear change of transverse displacement over the core thickness at wrinkling.
Abstract: The article presents the solution of symmetrical face sheet wrinkling problem for sandwich panel with composite facings and an orthotropic core. The new model is proposed for elastic core that takes into account compressive and shear stiffnesses as well as nonlinear change of transverse displacement over the core thickness at wrinkling. The governing buckling equation is derived using energy method. Analysis of cylindrical face wrinkling is performed for sandwich strips subjected to compressive loads applied to the two opposite simply supported edges. The effects of elastic and geometric parameters on the critical buckling stresses and wrinkling waves' formation are examined.
20 citations