05 Jul Presentation of the PhD dissertation “X-ray Tomography Investigation of the Impact Damage Mechanism of Thin-Ply Composites and the Use of Veils to Improve their Impact Tolerance” by Santiago García Rodríguez
On June 28th , Santiago García has presented his PhD thesis in the conference hall of the Polytechnic School. This contribution has focused on understanding how ply-thickness affects the out-of-plane response of thin quasi-isotropic non-crimp fabric laminates and on enhancing the impact tolerance of the thin-ply system using thermoplastic veils.
An extensive experimental campaign including CAI tests, X-ray tomography, ILSS tests and QSI tests has made it possible to assess the damage sequence in thin-ply composites, where the stress to propagate the initial crack is considereably higher than in standard laminates. However, this advantage is somewhat mitigated by the lower capability to resist CAI conditions.
The strategy to overcome this setback is the combination of veils and resin transfer moulding manufacturing. This is a cheap technique, commercially available and easy to incorporate during manufacturing. Two types of veils with different fibre thickness have been evaluated. The results confirm that this procedure enhances the impact tolerance and mode-I interlaminar fracture toughness of the thin-ply baseline laminate.
The thesis’ advisor has been Dr. Josep Costa (UdG). The grading panel consisted of Dr. Peter Linde (Chalmers University – Germany), Dr. Christophe Bouvet (Université Paul Sabatier – France) and Dr. Jordi Renart (UdG).
The AMADE research group wishes the new doctor a succesful research career.