Delamination of Bonded Repairs: A Damage Tolerance Approach

Title

Delamination of Bonded Repairs: A Damage Tolerance Approach

 Author

Pascoe, J.A.

Contributor

Alderliesten, R.C. (mentor)
Rans, C.D. (mentor)
Benedictus, R. (mentor)

Faculty

Aerospace Engineering

 Department

Structural Integrity & Composites

 Date

2012-05-31

 Abstract

A model was developed for delamination growth in bonded repair patches under constant amplitude fatigue loading. The model used the finite element method, employing the virtual crack closure technique, to determine the strain energy release rate (SERR) as a function of delamination length. Interaction effects between multiple delaminations, and the effect of delamination shape was also investigated. Fatigue cycling of coupon specimens was performed in order to find a relation between the SERR and the delamination growth rate. A power law (Paris-type) relation was established. Using this relation and the relation between SERR and delamination length, delamination growth predictions were produced. This predictions agreed well with the results of the coupon tests. A further validation by tests on more representative patch repair specimens was inconclusive due to the lack of delamination growth in the patch repair specimens.

 Subject

fatigue
delamination
adhesive bonding
Strain Energy Release Rate

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http://resolver.tudelft.nl/uuid:38e5d9ac-8c04-48d5-801f-b0c9308f67fa

 Part of collection

Student theses

 Document type

master thesis

 Rights

(c) 2012 Pascoe, J.A.
Files
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