Local approach of fracture on semi-crystalline polymers : contribution of X-ray laminography technique

Lucien Laiarinandrasana (1) , Thilo F. Morgeneyer (1) , Henry Proudhon (1) , Lukas Helfen (2) , Jacques Besson (1)

1 CDM - Centre des Matériaux
2 ESRF - European Synchrotron Radiation Facility

Damage mechanisms in a PolyAmide 6 semi-crystalline polymer were characterized by using Synchrotron Radiation Laminography technique on CT like specimen. Damage appeared as multiple penny shaped crazes. The maximum damage occurred at mid-thickness and located at a small distance from the notch root. An attempt was made to apply local approach of fracture concept thanks to finite element analysis using damage-based constitutive model. FE simulation successfully captured the aforementioned micro-mechanisms of crack initiation, by void coalescence. Further work is carried out to determine the crack dimension corresponding to the maximum net stress: the criterion being used for the global approach of fracture.

Mots clés: Polymers; X-ray laminography; Local approach of fracture; Finite element

Domaines: Matériaux

Lucien Laiarinandrasana, Thilo F. Morgeneyer, Henry Proudhon, Lukas Helfen, Jacques Besson. Local approach of fracture on semi-crystalline polymers : contribution of X-ray laminography technique. 13th international conference on fracture, Jun 2013, Beijing, China. 11 p. ⟨hal-00853439⟩