Finite element based damage and failure analysis of honeycomb core sandwich composite structures for space applications

2020 ◽  
Author(s):  
Karthik Rajan R. Venkatesan ◽  
Ashwin Rai ◽  
Tom G. Stoumbos ◽  
Daisaku Inoyama ◽  
Aditi Chattopadhyay
Keyword(s):  
Finite Element ◽  
Failure Analysis ◽  
Composite Structures ◽  
Sandwich Composite ◽  
Honeycomb Core ◽  
Space Applications ◽  
Damage And Failure

Influence of the Honeycomb Geometry on the Sandwich Composite Plate Behavior

2017 ◽  
Vol 1143 ◽  
pp. 139-144 ◽  
Author(s):  
Florentina Rotaru ◽  
Ionel Chirica ◽  
Elena Felicia Beznea
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Sandwich Plate ◽  
Compressive Loading ◽  
Sandwich Composite ◽  
Orthotropic Materials ◽  
Honeycomb Core ◽  
Element Analysis ◽  
Composite Sandwich ◽  
The Impact

In this paper the influence cell honeycomb geometry on the mechanical behaviour of a composite sandwich plate is analyzed. Three cell geometries (circular, hexagonal and square) are static analysed so that to select the best type of honeycomb that will be used in the manufacturing the sandwich plate core. The main aim is to develop approach models of equivalent orthotropic materials to replace the real model of honeycomb core with their properties so that to quickly calculate the sandwich plate made out of composite when is used a finite element analysis code. Geometry and material properties of the honeycomb are delivered by the material provider. Comparative analysis, by using Finite element analysis is performed for all geometries, in the same boundary conditions. Since in the impact loading of the composite sandwich plate the core is mainly loaded to compression, comparative study of the three cell geometries honeycomb was performed for this type of compressive loading. Since the cell is the basic element of the honeycomb core, the calculus is performed for one unit volume of sandwich, concerning also the part of skins.

Wave propagation in composite structures

2009 ◽  
Vol 225 (3) ◽  
pp. 639-648
Author(s):  
O Bareille ◽  
M N Ichchou
Keyword(s):  
Numerical Method ◽  
Composite Structures ◽  
Wave Number ◽  
Sandwich Composite ◽  
Flexural Wave ◽  
Honeycomb Core ◽  
Matching Criterion ◽  
Wave Numbers ◽  
Identification Technique ◽  
Measured Displacement

Dynamic behaviour of honeycomb-core composite structures forms the framework of this article. The wave numbers of propagative waves are the elements of comparison between a numerical method (wave finite-element method) and an experimental identification technique (inhomogeneous wave correlation). The numerical method is based on the description of the dynamics of periodic waveguides. The experimental technique uses a matching criterion with the measured displacement field to obtain the corresponding wave numbers for a wave-based description of the displacement. Both approaches are applied to a sandwich composite beam with a honeycomb core. They seem to be in quite good accordance with analytical results for the flexural wave number.

scholarly journals Vibration behaviour of a bio-composite sandwich with auxetic core

2019 ◽  
Vol 283 ◽  
pp. 09004
Author(s):  
Khawla Essassi ◽  
Jean-Luc Rebiere ◽  
Abderrahim El Mahi ◽  
Mahamane Toure ◽  
Mohamed amine Ben Souf ◽  
...  
Keyword(s):  
Composite Structures ◽  
Sandwich Structures ◽  
Dynamic Properties ◽  
Flexural Vibration ◽  
Flax Fibre ◽  
Sandwich Composite ◽  
Fibre Reinforcement ◽  
Damping Properties ◽  
Honeycomb Core ◽  
Composite Sandwich

This paper describes the flexural vibration and damping performances of an eco-composite sandwich structure with re-entrant honeycomb core. The main objective of this study is to analyse the effect of flax fibre reinforcement composite and the densities of the auxetic core on the dynamic properties of the sandwich structures. The damping properties and the sandwich stiffness are determined in bending beams for different free lengths in a clamped-free configuration. Firstly, the dynamic properties of the skins were investigated in order to develop the evolution of mechanical properties as well as damping coefficient for each material. Then, the same characterization was tested on the sandwich structures with different core densities. The results obtained showed that both core densities and flax fibre as reinforcement plays a major role on the dynamic properties of the sandwich composite structures.

Effects of honeycomb core damage on the performance of composite sandwich structures

2019 ◽  
Vol 54 (16) ◽  
pp. 2159-2171
Author(s):  
William T King ◽  
William E Guin ◽  
J Brian Jordon ◽  
Mark E Barkey ◽  
Paul G Allison
Keyword(s):  
Finite Element ◽  
Shear Modulus ◽  
Composite Structures ◽  
Sandwich Structures ◽  
Honeycomb Core ◽  
Element Analysis ◽  
Composite Sandwich ◽  
Core Damage ◽  
Composite Sandwich Structures ◽  
Aluminum Honeycomb

This work presents an experimental and numerical investigation of the effects of pre-existing core damage on aluminum honeycomb core composite sandwich structures. Quasi static flexural and compression experiments were performed, where the effects of core damage on the shear modulus and Young's modulus were quantified. In addition, finite element analysis was performed on the sandwich structures to elucidate the effects of the core damage on the structural response. Comparisons of experimental and finite element responses are presented for sandwich structures consisting of carbon fiber facesheets and an aluminum honeycomb core. The pre-existing core damage is observed to cause up to an 8% reduction in shear modulus and a 9% reduction in elastic modulus. It is also determined that the presence of pre-existing core damage results in an asymmetrical compressive load distribution in the composite structures.

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