Journal ArticleDOI
Numerical approach to calculate thermal expansion of honeycomb sandwich panel with composite face sheets
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TLDR
In this article, a model on detailed structure of a unit cell for sandwich panels is developed utilizing the 3D finite element method, and a periodic boundary condition is introduced to the model to represent the repetitive structures of the sandwich panel.Abstract:
The aim of this paper is to show an accurate method to predict thermal deformations of honeycomb sandwich panels having composite skins First of all, some problems of the conventional method using the laminate theory are pointed out In order to develop an effective predicting method, a model on detailed structure of a unit cell for sandwich panels is developed utilizing the 3D finite element method A periodic boundary condition is introduced to the model to represent the repetitive structures of the sandwich panel The effective elastic modulus of the cell foil is obtained from the result of an out-of-plane compressive test on the honeycomb core The adhesives between skin and core is modeled by considering its shape and quantity The difference between the CTE according to this model and the actually measured one is approximately 01 × 10-6/K The paper further attempts to explain the anisotropic character of the sandwich panel The result of this analysis suggests that the direction-dependency of theread more
Citations
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Journal ArticleDOI
Thermal Conductivity Properties and Heat Transfer Analysis of Multi-re-entrant Auxetic Honeycomb Structures
P. Innocenti,Fabrizio Scarpa +1 more
TL;DR: In this article, the static and transient conductivity properties of a centerymmetric honeycomb structure are evaluated using analytical and finite element (FE) models, and a transient thermal analysis is performed numerically to evaluate the possible use of this honeycomb configuration for sandwich panels in thermal protection systems.
Journal ArticleDOI
Honeycomb sandwich residual stress deformation pattern
Gerald Kress,M. Winkler +1 more
TL;DR: In this article, the authors address the phenomenon of face-sheet undulation of multi-material sandwich structures with honeycomb cores and show that the periodic deflection pattern can be caused by residual stresses.
Journal ArticleDOI
Heat Insulation Analysis of an Aluminum Honeycomb Sandwich Structure
TL;DR: In this paper, a heat transfer analysis on a sandwich thermal protection system (TPS) for future flight vehicles has been performed on Al alloy honeycomb sandwich panels and the validations of experimental work using ANSYS analysis have been performed.
Journal ArticleDOI
Out-of-plane deformation due to the ply angle misalignment in cfrp laminates (the effect of the stacking sequence on thermal deformation)
TL;DR: In this paper, an analysis based on laminate theory was performed to calculate the thermal deformation of CFRP laminate and Mohr curvature circle was also incorporated to evaluate the deformation as P-V (peak to valley) values.
Dissertation
Comportement statique et dynamique d'une structure periodique 3d d'un echangeur aeronautique : étude experimentale, modelisation et simulations numeriques
TL;DR: In this article, two modeles are proposed for remplacer la structure reelle du faisceau : un modele "homogene" and un modelet "stratifie".
References
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Journal ArticleDOI
Preprocessing and postprocessing for materials based on the homogenization method with adaptive finite element methods
José M. Guedes,Noboru Kikuchi +1 more
TL;DR: In this paper, the effective average elastic constants of linear elasticity of general composite materials by considering their microstructure were determined using the homogenization method, and a finite element approximation was introduced with convergence study and corresponding error estimate.
Journal ArticleDOI
Global/Local Finite Element Analysis for Textile Composites
Kyeongsik Woo,John D. Whitcomb +1 more
TL;DR: In this paper, a finite element analysis of textile composite structures is performed using a global/local methodology combined with special macro elements, and the results show that the analysis is feasible for large complex microstructure.
Journal ArticleDOI
Three-Dimensional Failure Analysis of Plain Weave Textile Composites Using a Global/Local Finite Element Method:
Kyeongsik Woo,John D. Whitcomb +1 more
TL;DR: In this article, the failure behavior of plain weave textile composites was found to be sensitive to the fiber bundle waviness, and the initial failure mode was the fiber bundling separation when the wavness ratio was high.
Journal ArticleDOI
Fiber Composite Sandwich Thermostructural Behavior: Computational Simulation
TL;DR: In this article, four computational simulation methods with different levels of sophistication were used to simulate thermal behavior and structural changes of composite sandwich panels with a honeycomb core subjected to a variety of environmental effects.
Journal ArticleDOI
Effect of Assumed Tow Architecture on Predicted Moduli and Stresses in Plain Weave Composites
TL;DR: In this paper, the effect of assumed tow geometry on the predicted moduli and stresses in plain weave textile composites is explored. But the effect is limited to the case of a T300/Epoxy composite with symmetrically stacked mats.