Impact resistance of composite scarf joints under load

Kim, M 2010, Impact resistance of composite scarf joints under load, Masters by Research, Aerospace, Mechanical and Manufacturing Engineering, RMIT University.


Document type: Thesis
Collection: Theses

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Title Impact resistance of composite scarf joints under load
Author(s) Kim, M
Year 2010
Abstract Composite laminate coupons and scarf joints test series were carried out in wide ranges of impact energy (2 – 19 J) and a large range of tensile pre-strain levels (0 – 5000 µε). Pre-straining the composite increased the size of the damage area. The work also showed that composite laminate coupons can be used to some extent to replicate the impact and damage response of composite scarf joints. For the scarf joint, the majority of the damage occurred in adherend regions rather than the adhesive region, but the adhesive damage increased as the pre-strain increased, ultimately leading to catastrophic failure. Most importantly, delamination propagation along the lower 45° ply toward the bondline was found to introduce bondline failure in the interface of the adhesive and adherend. Detailed numerical validation of the experimental results was carried out. A 3D model was developed to validate delamination in the damaged laminate coupons and delamination and bondline damage in the adhesive layer. As a result of this work, the development of a numerical methodology to capture the dynamic response of the scarf joints under pre-tension and their interacting failure mechanisms is accomplished.
Degree Masters by Research
Institution RMIT University
School, Department or Centre Aerospace, Mechanical and Manufacturing Engineering
Keyword(s) Composite
scarf joint
preload
Dynamic Impact
Delamination
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Created: Fri, 08 Apr 2011, 16:01:59 EST by Guy Aron
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