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Numerical analysis of the effect of thermal residual stresses on the performances of bonded composite repairs in aircraft structures

✍ Scribed by A. Albedah; B. Bachir Bouiadjra; L. Aminallah; M. Es-Saheb; F. Benyahia

Publisher: Elsevier Science
Year: 2011
Tongue: English
Weight: 590 KB
Volume: 42
Category: Article
ISSN: 1359-8368
DOI: 10.1016/j.compositesb.2010.11.013

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✦ Synopsis

In this study the finite element method is used to analyse the effect of the thermal residual stresses resulting from adhesive curing on the performances of the bonded composite repair in aircraft structures. The stress-intensity factor at the crack tip is chosen as fracture criterion in order to estimate the repair performances. The obtained results show that the presence of the thermal residual stresses reduces considerably the repair performances and consequently decreases the fatigue life of cracked structures. The effects of the curing temperature, the adhesive properties and the adhesive thickness on the stressintensity factor (SIF) variation with thermal stresses are also analysed.

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