Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7889252 | Composites Part A: Applied Science and Manufacturing | 2018 | 38 Pages |
Abstract
While thin-plies delay the onset of matrix cracking and improve certain in-plane mechanical properties, the effect they have on the out-of-plane response remains unclear. We compared the impact resistance, tolerance and sequence of failure events of thin laminates manufactured with thin- or standard-ply non-crimp fabrics (fibre areal weight of 67 and 134 gsm per ply). Damage initiation and propagation was detailed using (a) quasi-static indentation and impact tests at incremental energy levels and (b) X-ray tomography. The analysis revealed the damage mechanisms underlying the observed load drops in the force-displacement curves. In the indented specimens, the 3D post-process ascribed matrix cracks and delaminations to their corresponding plies/interfaces. Standard-ply samples develop more extended delaminations and delay fibre failure, improving the load-carrying capacity and increasing compression after impact (CAI) strength by 27% for impact at 14Â J.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
S.M. GarcÃa-RodrÃguez, J. Costa, A. Bardera, V. Singery, D. Trias,