An experimental analysis of fracture mechanisms of short glass fibre reinforced polyamide 6,6 (SGFR-PA66)

Bouchaib Mouhmid (1) , Abdellatif Imad (1) , Noureddine Benseddiq (1) , D. Lecompte

1 LML - Laboratoire de Mécanique de Lille - FRE 3723

In the present work, toughness of unfilled polyamide 6,6 (PA66) and short glass fibre reinforced polyamide 6,6 (SGFR-PA66) was investigated. Digital image correlation (DIC) was used with a single camera for in-plane displacement field measurement and then strain computation. The results allowed to extract the resistance curve for the PA66 and critical stress intensity factors, KIc, for the SGFR-PA66 with three glass fibre contents (15%, 30% and 50% (wt)) and under room temperature (20 °C). The tests were carried out on single edge notched tension (SENT) specimens. The DIC technique allowed to precise the spatial distribution of the local strains in a defined region including the crack tip at different steps of the loading. Scanning electron microscopy observations illustrated different damage mechanisms occurring in the studied composites: matrix crack, fibre–matrix interface failure and fibres pull out.

Mots clés: A. Glass fibre reinforced composites; B. Toughness; D. Digital image correlation

Bouchaib Mouhmid, Abdellatif Imad, Noureddine Benseddiq, D. Lecompte. An experimental analysis of fracture mechanisms of short glass fibre reinforced polyamide 6,6 (SGFR-PA66). Composites Science and Technology, 2009, 69 (15-16), pp.2521-2526. ⟨10.1016/j.compscitech.2009.07.003⟩. ⟨hal-00429741⟩