Self-Organization at the Crack Tip of Fatigue-Resistant Thermoplastic Polyurethane Elastomers - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Macromolecules Année : 2021

Self-Organization at the Crack Tip of Fatigue-Resistant Thermoplastic Polyurethane Elastomers

Résumé

Despite their technological relevance, the resistance of soft thermoplastic polyurethanes (TPU) to crack propagation in cyclic fatigue has never been investigated in detail. In particular, a clear shortcoming in the literature for this class of materials is the lack of connection between the cyclic fatigue resistance and the large strain behavior that has a fundamental role in defining the material’s resistance to crack propagation. We demonstrate here for the first time that when the strain-induced stiffening mechanism of TPU (already observed for large deformation) is combined with the presence of the nonhomogeneous strain, as in the case of cyclic fatigue, it produces a selective reinforcement in the crack tip area, which is the key to explain the remarkable cyclic fatigue resistance of TPU. Using commercial TPU with similar modulus (∼8 MPa) but different large strain behavior, we show that the described mechanism stems from the multiphase nature of TPU and it is not necessarily linked to a specific large strain property as the case of TPU, which undergoes strain-induced crystallization.
Fichier principal
Vignette du fichier
Black Self-organization at the crack tip of fatigue_Preprint_Sept2021-Macromolecules.pdf (1.7 Mo) Télécharger le fichier
ma1c00934_si_001.pdf (229.32 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03352631 , version 1 (23-09-2021)

Identifiants

Citer

Giorgia Scetta, Eric Euchler, Jianzhu Ju, Nathan Selles, Patrick Heuillet, et al.. Self-Organization at the Crack Tip of Fatigue-Resistant Thermoplastic Polyurethane Elastomers. Macromolecules, 2021, ⟨10.1021/acs.macromol.1c00934⟩. ⟨hal-03352631⟩
108 Consultations
123 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More