Optimal design, manufacturing and testing of non-conventional laminates

Optimal design, manufacturing and testing of non-conventional laminates

Peeters, D.M.J. (TU Delft Aerospace Manufacturing Technologies)
Irisarri, François Xavier (Office National d'Etudes et de Recherches Aerospatiales)
Groenendijk, Chris (Royal Netherlands Aerospace Centre NLR)
Růžek, Roman (Czech Aerospace Research Centre, Beranových)

2019-02-15

Composite materials are finding increasing application, for example in commercial aircraft. Traditionally fiber angles are restricted to 0°,±45° and 90°. The current work exploits the possibility of using multiple ’non-conventional’ laminates where either fiber steering (‘variable stiffness’), ply drops (‘variable thickness’), or a combination of both is used. This leads to varying mechanical properties which means the load is being redistributed, increasing the overall buckling load. A flat panel of 400×600 mm loaded in uni-axial compression is optimized in the current work. As a benchmark a conventional laminate is used. The non-conventional laminates are 15% lighter to emphasize the possible weight savings. Only using variable stiffness or variable thickness is experimentally shown to not be sufficient to match the buckling load of the benchmark panel. However, using a combination of both, a 10% increase in the buckling load was found for a panel that is 15% lighter. This highlights the potential of non-conventional laminates.

Fibre placement
Fibre steering
Testing
Variable stiffness
Variable thickness

http://resolver.tudelft.nl/uuid:f88245b7-b6a3-4a78-988a-3706b15b6c7c

https://doi.org/10.1016/j.compstruct.2018.10.062

2020-11-19

0263-8223

Composite Structures, 210, 29-40

Institutional Repository

journal article

© 2019 D.M.J. Peeters, François Xavier Irisarri, Chris Groenendijk, Roman Růžek