Uniaxial, biaxial, and planar tension properties of deep fascia and a constitutive model to simultaneously reproduce these strain states

Aparici-Gil, Alejandro ; Peña, Estefanía (Universidad de Zaragoza) ; Pérez, Marta M. (Universidad de Zaragoza)

Resumen: This study aims to provide an in-depth analysis of the mechanical behavior of deep fascia through a comprehensive multidimensional characterization, including uniaxial, biaxial, and planar tension tests. To determine material parameters via test fitting, both a newly developed coupled exponential energy function and a previously proposed uncoupled exponential model—both considering two perpendicular fiber directions—are evaluated. For the uniaxial response, the mean stress measured was 3.96 MPa in the longitudinal direction and 0.6 MPa in the transverse direction at a stretch (λ) of 1.055. In planar tension tests, stress values of 0.43 MPa and 0.11 MPa were recorded for the longitudinal and transverse directions, respectively, at λ = 1.72. Under equibiaxial loading conditions, the mean stresses were 3.16 MPa and 1.2 MPa for the longitudinal and transverse directions when λ reached 1.037, respectively. The fitting results indicate that while the uncoupled exponential model effectively captures the uniaxial and equibiaxial experimental data, it fails to predict other mechanical responses accurately. In contrast, the coupled exponential strain energy function (SEF) demonstrates robust performance in both fitting and prediction. Additionally, an analysis was conducted to assess how the number and combination of tests influence the determination of material parameters. Findings suggest that a single biaxial test incorporating three loading ratios is sufficient to accurately capture and predict uniaxial, planar tension, and other biaxial strain states.

Idioma: Inglés

DOI: 10.3389/fbioe.2025.1494793

Año: 2025

Publicado en: Frontiers in Bioengineering and Biotechnology 13 (2025), 1494793 [17 pp.]
ISSN: 2296-4185

Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/T24-20R
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2022-140219OB-I00

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Anatom.Anatom.Patológ.Com (Dpto. Anatom.,Embri.Genét.Ani.)
Área (Departamento): Área Mec.Med.Cont. y Teor.Est. (Dpto. Ingeniería Mecánica)