Damage evolution in GLARE fibre-metal laminate under repeated low-velocity impact tests

Damage evolution in GLARE fibre-metal laminate under repeated low-velocity impact tests

Morinière, F.D.
Alderliesten, R.C.
Tooski, M.Y.
Benedictus, R.

Aerospace Engineering

Aerspace Structures and Materials

2012-12-01

An experimental study was performed on the repeated low-velocity impact behaviour of GLARE. Damage evolution in the material constituents was characterised with successive number of impacts. Records were correlated with visual inspection, ultrasound C-scan and chemical etching. The stiffness of the plate varied when cumulating the number of impacts. Damage accumulation was limited thanks to the synthesis of unidirectional composite and metal. The glass/epoxy plies with high elastic tensile strength could withstand several impacts before perforation despite delamination growth in the vicinity of the impacted area. The damage tolerant aluminium layers prevented the penetration of the projectile and avoided the expansion of delamination. This efficient mechanism preserved the structural integrity of GLARE until first aluminium cracking at the non-impacted side. Among the different failure modes, plate deformation absorbed most of the impact energy. The findings will support the development of a generic quasi-static analytical model and numerical methods.

low-velocity impact
GLARE 5 FML
delamination
C-scan
chemical etching

http://resolver.tudelft.nl/uuid:21c6398e-9836-4bf0-8ae4-75f2d29a5d1b

https://doi.org/10.2478/s13531-012-0019-z

Springer-Verlag

2081-9927

http://link.springer.com/article/10.2478/s13531-012-0019-z

Central Euroepan Journal of Engineering, 2(4)2012

Institutional Repository

journal article

(c)2012 The Authors and Springer