Effect of ply thickness and ply level hybridization on the compression after impact strength of thin laminates
Journal article, 2019

There is a lack of research available on how thin laminates respond to impact and post impact loads, even though thin structures are used in present-day aircrafts. This experimental paper employs thick, standard and thin uni-directional plies to investigate the effect ply thickness has on thin laminates on their impact and compression after impact (CAI) response. Further, we propose two hybrid laminates where thick or standard plies are mixed with thin plies, respectively, in an effort to improve the CAI strength of thin laminates. Results reveal that, contrary to thick laminates, thin laminates made of only thin plies exhibit extensive fibre failure, leading to a considerably reduced CAI strength. Moreover, the hybrid laminate where thick 0° plies are mixed with thin plies improves the CAI strength by 40% over the thin ply baseline laminate. Thus, hybridization with thin laminates appears to be an economic prospective in terms of improving damage tolerance.

Ply hybridization

Damage mechanics

Compression after impact

Damage tolerance

Impact behaviour


A. Sasikumar

University of Girona

D. Trias

University of Girona

J. Costa

University of Girona

N. Blanco

University of Girona

J. Orr

University of Dayton Research Institute

Peter Linde

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Composites Part A: Applied Science and Manufacturing

1359-835X (ISSN)

Vol. 121 232-242

Structural pOweR CompositEs foR futurE civil aiRcraft (SORCERER)

European Commission (EC) (EC/H2020/738085), 2017-02-01 -- 2020-02-28.

Subject Categories

Polymer Chemistry

Vehicle Engineering

Composite Science and Engineering

Areas of Advance

Materials Science



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