Durability of stiffened CFRP panels with initial delaminations

Master Thesis (2018)
Author(s)

D.J.H. Cederløf (TU Delft - Aerospace Engineering)

Contributor(s)

Christos Kassapoglou – Mentor

R Benedictus – Graduation committee member

Calvin D. Rans – Graduation committee member

M.V. Donadon – Graduation committee member

Faculty
Aerospace Engineering
Copyright
© 2018 Daan Cederløf
More Info
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Publication Year
2018
Language
English
Copyright
© 2018 Daan Cederløf
Graduation Date
02-07-2018
Awarding Institution
Delft University of Technology
Project
['INOVA']
Programme
['Aerospace Engineering']
Faculty
Aerospace Engineering
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Abstract

A numerical fatigue delamination model is validated by means of experimental tests. Delamination is initiated on the skin-stiffener interface which, under cyclic compressive loading and in the post-buckling regime, grows at a decreasing rate. A cohesive zone formulation is used to model the static and fatigue delamination growth, good agreement is found in terms of delamination shape. Further investigation is required, using improved material inputs, for the model to be validated in terms of delamination magnitude. The numerical model shows promising characteristics, which may be employed for future damage tolerant composite structural designs.

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