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FME Transactions
2013, vol. 41, iss. 4, pp. 325-332
article language: English
unclassified

3D random fiber composites as a repair material for damaged honeycomb cores
aUniversity of Belgrade, Faculty of Mechanical Engineering
bMilitary Academy, Belgrade
cAirbus operations S.A.S Saint Martin, M30 ESBESLT, Toulouse, France

e-mail: mdinulovic@mas.bg.ac.rs

Abstract

The increased use of composites has rendered the need for development of reliable and efficient repair techniques. Like all other metallic structures composite structures are prone to variety of damage. Repair techniques developed for metallic structures are not directly applicable to composites and problem of composite repair has to be investigated in great detail. In the present paper application of 3D random fiber polymer composites, as a repair material for damaged high density honeycomb cores in sandwich structures is investigated. Based on Pan 's theory the expression for matching fiber volume fraction of the repair material is derived and complete stress-strain field, of the repaired sandwich structure is determined using finite element approach. It is concluded that the 3D random fiber composites represent very good candidates as repair materials for damaged honeycomb structured composites.

Keywords

honeycomb core; composite repair; 3D random fiber composites

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