Article metrics

  • citations in SCindeks: 0
  • citations in Google Scholar:[=>]
  • visits in previous 30 days:3
  • full-text downloads in 30 days:1
article: 10 from 12  
Back back to result list
FME Transactions
2013, vol. 41, iss. 4, pp. 325-332
article language: English

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



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.


honeycomb core; composite repair; 3D random fiber composites


*** (2004) Bonded repairs of aircraft composite sandwich structures. Final report, DOT/FAA/AR-03/74, February
Albedah, A., Bouiadjra, B.B., Mhamdia, R., Benyahia, F., Es-Saheb, M. (2011) Comparison between double and single sided bonded composite repair with circular shape. Materials & Design, 32(2): 996-1000
Armstrong, K.B. (2003) Efforts to standardize aerospace composite repairs, 1988-2003. Proceedings of the Institution of Mechanical Engineers, Part G Journal of Aerospace Engineering, (236): 217-223
Caminero, M.A., Pavlopoulou, S., Lopez-Pedrosa, M., Nicolaisson, B.G., Pinna, C., Soutis, C. (2013) Analysis of adhesively bonded repairs in composites: Damage detection and prognosis. Composite Structures, 95: 500-517
Dinulovic, M. (2008) Composite Structures Repair Methodology Development, Based on the Local Stress Strain Condition. Belgrade: Faculty of Mechanical Engineering, University of Belgrade, PhD thesis (in Serbian)
Garinis, D., Dinulović, M., Rašuo, B. (2012) Dinamička analiza modifikovane helikopterske lopatice od kompozitnih materijala. FME Transactions, vol. 40, br. 2, str. 63-68
Masters, I.G., Evans, K.E. (1996) Models for the elastic deformation of honeycombs. Composite Structures, 35(4): 403-422
Mitchell, M.R., Link, R.E., Rasuo, B. (2011) Experimental Techniques for Evaluation of Fatigue Characteristics of Laminated Constructions from Composite Materials: Full-Scale Testing of the Helicopter Rotor Blades. Journal of Testing and Evaluation, 39(2): 102768
Nast, E. (1997) On honeycomb-type core moduli. in: AIAA/ASME/AHS Adaptive Structures Forum, Kissimmee, FL, Apr. 7-10 1997., Collection of Technical Papers, Pt. 2 (A97-24112 05-39)
Office of Aviation Research (2003) Guidelines for analysis, testing, and nondestructive inspection of impact-damaged composite sandwich structures. Final Report, D0T/FAA/AR-02/121, March
Pan, Y., Iorga, L., Pelegri, A.A. (2008) Analysis of 3D random chopped fiber reinforced composites using FEM and random sequential adsorption. Computational Materials Science, 43(3): 450-461
Rachid, M., Serier, B., Bouiadjra, B.B., Belhouari, M. (2012) Numerical analysis of the patch shape effects on the performances of bonded composite repair in aircraft structures. Composites Part B: Engineering, 43(2): 391-397
Rasuo, B. (2007) An experimental methodology for evaluating survivability of an aeronautical construction from composite materials: An overview. International Journal of Crashworthiness, 12(1): 9-15
Rasuo, B. (1995) Aircraft production technology. Belgrade: Faculty of mechanical engineering
Rasuo, B. (2010) Experimental study of structural damping of composite helicopter blades with different cores. Plastics, Rubber and Composites, 39(1): 1-5
Zhang, J., Ashby, M.F. (1992) The Out-ofPlane Propties of Honeycombs. International Journal of Mechanical Sciences, 34(6): 475-489