Fatigue damage investigation of PA66/GF30 by X-Ray microtomography

Muhamad Fatikul Arif (1) , Fodil Meraghni (1) , Nicolas Saintier (2) , Yves Chemisky (1) , Joseph Fitoussi (3) , Gilles Robert (4)

1 LEM3 - Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux
2 I2M - Institut de Mécanique et d'Ingénierie de Bordeaux
3 PIMM - Laboratoire Procédés et Ingénierie en Mécanique et Matériaux
4 Solvay Engineering Plastics

Damage behavior of dry as molded, 30 wt% short glass fiber reinforced polyamide-66 (PA66/GF30) under fatigue loading has been investigated by X-ray micro-computed tomography (μCT). Based on visual observation on μCT images, fiber/matrix interfacial debonding is considered as the main fatigue damage mechanism. Void features in the shell and core layer of the μCT 3D images have been identified. The trend of void volume and void aspect ratio shows marked difference on the damage kinetic between the shell and core layer. Though the damage is mainly developed along fiber interface in both shell and core layer, the interfacial debonding in the shell layer appears earlier than the one in the core layer. While the damage at fiber interface in the shell layer develops in all fatigue loaded specimens, the interfacial debonding in the core layer appears only at the very last stage of the fatigue life.

Mots clés: Micro-computed tomography; Damage mechanisms; Fatigue; Injection molding

Domaines: Matériaux; Mécanique [physics.med-ph]; Mécanique des matériaux [physics.class-ph]; Mécanique des solides [physics.class-ph]

Muhamad Fatikul Arif, Fodil Meraghni, Nicolas Saintier, Yves Chemisky, Joseph Fitoussi, et al.. Fatigue damage investigation of PA66/GF30 by X-Ray microtomography. ECCM16 - 16th European Conference on Composite Materials, Jun 2014, Séville, Spain. ⟨hal-01218150⟩