Fiber orientation and crimp level might control the auxetic effect of biological tissues - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of the mechanical behavior of biomedical materials Année : 2023

Fiber orientation and crimp level might control the auxetic effect of biological tissues

Résumé

We propose an analytical micromechanical model for studying the lamellarcomposite-like structure of fibrous soft tissue. The tissue under consideration is made up of several lamellae, and is designed to resemble the annulus fibrosus (AF) tissue or media layer of arterial tissue, for example. The collagen fibers are arranged in parallel in each lamella and the fiber orientation differs from one lamella to its neighbors. The parallel fibers in each lamella of AF tissue, for example, have been observed to have a crimped microstructure. The proposed model incorporates this quality, considering fiber waviness as a sinusoidal shape and taking into account the fiber dispersion in different layers, where both fiber and matrix are considered as solid phases. We find that collagen-fiber waviness and layer orientation have a significant influence on Poisson's ratio. The effective Poisson's ratio predicted by the proposed model demonstrates that the crimped collagen fiber microstructure might weaken the auxetic effect of fibrous soft tissue, which might explain why, as the literature suggests, the auxetic behavior is more difficult to observe than large Poisson's ratios. As opposed to the many studies that use the well-known hyperelastic fiber-based constitutive model, in which out-of-plane expansion is often observed, the present work explains the auxetic response found in modeling and in experimental data from the perspective of collagen fiber microstructure.
Fichier principal
Vignette du fichier
Piao_al_JMBBM_2023.pdf (2.12 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04458130 , version 1 (14-02-2024)

Identifiants

Citer

Chenghe Piao, Simon Le Floc’h, Patrick Cañadas, Christiane Wagner-Kocher, Pascale Royer. Fiber orientation and crimp level might control the auxetic effect of biological tissues. Journal of the mechanical behavior of biomedical materials, 2023, 147, pp.106098. ⟨10.1016/j.jmbbm.2023.106098⟩. ⟨hal-04458130⟩
21 Consultations
3 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More