A 3D tomographic investigation to elucidate the low-velocity Impact resistance, tolerance and damage sequence of thin non-crimp fabric laminates: effect of ply-thickness

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A 3D tomographic investigation to elucidate the low-velocity Impact resistance, tolerance and damage sequence of thin non-crimp fabric laminates: effect of ply-thickness

The October ’18 issue of Composites Part A includes a contribution by S. García-Rodríguez et al. that compares the out-of-plane response of thin-plies with that of standard-ply samples. Damage initiation and propagation has been detailed using quasi-static indentation and impact tests at incremental energy levels, and X-ray tomography. Thus, it has been possible to observe the damage mechanisms behind the load drops in the force-displacement curves. A 3D post-process allows to identify cracks and delaminations to the plies/interfaces. The larger load-carrying capacity and CAI of the standard-ply samples are attributed to the fact that delaminations are more extended and fibre failure is delayed.

 

Paper information

Title A 3D tomographic investigation to elucidate the low-velocity Impact resistance, tolerance and damage sequence of thin non-crimp fabric laminates: effect of ply-thickness
Authors: S.M. García-Rodríguez; J. Costa; A. Bardera; V. Singery;
D. Trias

Journal, Volume, Page, Year: Composites Part A: Applied Science and Manufacturing, 113, 53–65 (2018)
DOI:

https://doi.org/10.1016/j.compositesa.2018.07.013

 

Highlights

  • X-ray tomography illustrated the damage caused by low-velocity impact (thin- and thick-ply specimens).
  • The thin-plies delay/reduce the initiation of matrix cracks and delamination.
  • Reduced damage leads to brittle failure and lower damage tolerance.

 

Project and Funding

  • Relevant projects: Chomarat 2015-CHO-01
  • Funding institutions: Secretaria d’Universitats i Recerca del Departament d’Empresa I Coneixement de la Generalitat de Catalunya through the pre-doctoral grant 2016FI_B_00551, co-funded by the Fondo Social Europeo (FSE).