Experimental investigation and modeling attempt on the effects of ultraviolet aging on the fatigue behavior of an LDPE semi-crystalline polymer

Hamza Lamnii (1, 2) , Moussa Nait-Abelaziz (1, 2) , Georges Ayoub (3) , Xavier Colin (4) , U. Maschke (1, 5)

1 Université de Lille
2 UML - Unité de Mécanique de Lille - ULR 7512
3 Texas A&M University at Qatar
4 PIMM - Laboratoire Procédés et Ingénierie en Mécanique et Matériaux
5 UMET - Unité Matériaux et Transformations - UMR 8207

The objective of this study was to investigate the effect of UV irradiation on the fatigue life of a bulk semi-crystalline polymer. Low-density polyethylene samples exposed to different UV irradiation doses were fatigue tested. Fatigue indicator based on dissipated energy per cycle was found to present the best correlation with the experimental fatigue results. A master curve unifying the experimental fatigue results for as-received and UV-aged materials was obtained when subtracting the dissipated energy threshold from the total dissipated energy. Finally, the evolution of the damage with cyclic loading was analyzed and preliminary modeling was attempted.

Mots clés: Mechanical Engineering; Modelling and Simulation; Industrial and Manufacturing Engineering; General Materials Science; Mechanics of Materials

Domaines: Matériaux

Hamza Lamnii, Moussa Nait-Abelaziz, Georges Ayoub, Xavier Colin, U. Maschke. Experimental investigation and modeling attempt on the effects of ultraviolet aging on the fatigue behavior of an LDPE semi-crystalline polymer. International Journal of Fatigue, 2021, 142, pp.1-12. ⟨10.1016/j.ijfatigue.2020.105952⟩. ⟨hal-02954651⟩