Low-strain effective Young's modulus model and validation for multi-layer vocal fold-based silicone specimens with inclusions

M. Ahmad, X. Pelorson, I. A. Fernández, O. Guasch, A. Van Hirtum

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Resum

A model of the effective low-strain elastic Young's modulus of multi-layer stacked composites is proposed, which is capable to account for an arbitrary stacked inclusion. Geometrical and discretization-based model results are validated against measured effective Young's moduli (from 10 up to 40 kPa) on 14 molded silicone specimens embedding a stiff (298 kPa) inclusion with variable size, position, and stacking. Specimens without inclusion represent the muscle, superficial, and epithelium layers in a human vocal fold with Young's moduli between 4 and 65 kPa. The proposed model allows to predict the influence of a stiff inclusion, mimicking a structural abnormality or pathology somewhere within the vocal fold, on the low-strain effective Young's modulus. Quantifying the influence of an inclusion or local stiffening on the vocal fold bio-mechanics is a necessary step toward the understanding and mitigation of structural vocal fold pathologies and associated voice disorders.

Idioma originalAnglès
Número d’article054701
RevistaJournal of Applied Physics
Volum131
Número5
DOIs
Estat de la publicacióPublicada - 7 de febr. 2022

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