Journal ArticleDOI
Structural modeling of sandwich structures with lightweight cellular cores
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TLDR
In this paper, an effective single layered finite element (FE) computational model is proposed to predict the structural behavior of lightweight sandwich panels having two dimensional (2D) prismatic or three dimensional (3D) truss cores.Abstract:
An effective single layered finite element (FE) computational model is proposed to predict the structural behavior of lightweight sandwich panels having two dimensional (2D) prismatic or three dimensional (3D) truss cores. Three different types of cellular core topology are considered: pyramidal truss core (3D), Kagome truss core (3D) and corrugated core (2D), representing three kinds of material anisotropy: orthotropic, monoclinic and general anisotropic. A homogenization technique is developed to obtain the homogenized macroscopic stiffness properties of the cellular core. In comparison with the results obtained by using detailed FE model, the single layered computational model can give acceptable predictions for both the static and dynamic behaviors of orthotropic truss core sandwich panels. However, for non-orthotropic 3D truss cores, the predictions are not so well. For both static and dynamic behaviors of a 2D corrugated core sandwich panel, the predictions derived by the single layered computational model is generally acceptable when the size of the unit cell varies within a certain range, with the predictions for moderately strong or strong corrugated cores more accurate than those for weak cores.read more
Citations
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Journal ArticleDOI
An equivalent material formulation for sinusoidal corrugated cores of structural sandwich panels
TL;DR: In this article, an innovative aluminum sandwich panel with sinusoidal corrugated core is investigated and the properties of the equivalent material are determined both analytically and numerically for the chosen Reissner-Mindlin orthotropic representation.
Journal ArticleDOI
Free vibration analysis of composite sandwich panels with hierarchical honeycomb sandwich core
TL;DR: In this article, the vibration characteristics of sandwich panels with a hierarchical composite honeycomb sandwich core were investigated and an orthotropic constitutive model was proposed to predict the natural frequencies and mode shapes of the sandwich panels.
Journal ArticleDOI
Free vibration analysis of sandwich beams with honeycomb-corrugation hybrid cores
TL;DR: In this article, the vibration performance of sandwich beams with honeycomb-corrugation hybrid cores was investigated, and the method of homogenization was employed to obtain the equivalent macroscopic stiffness of honeycomb and Corrugation Hybrid cores.
Journal ArticleDOI
Design optimization of foam-reinforced corrugated sandwich beams
TL;DR: In this article, a combined analytical and numerical study is carried out for the structural stiffness, collapse strength and minimum mass design of foam-filled corrugated sandwich beams under transverse three-point bending.
Journal ArticleDOI
Sound transmission through composite sandwich plate with pyramidal truss cores
Dong-Wei Wang,Li Ma +1 more
TL;DR: In this article, the sound transmission loss through sandwich structure with pyramidal truss cores immersed in the surrounding acoustic fluids is investigated, and the periodic model is established in two dimensions.
References
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Journal ArticleDOI
Computational Models for Sandwich Panels and Shells
TL;DR: A review of computational models for sandwich plates and shells, predictor-corrector procedures, and the sensitivity of the sandwich response to variations in the different geometric and material parameters can be found in this article.