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Elastic properties of arteries: A nonlinear two-layer cylindrical model

1981; Elsevier BV; Volume: 14; Issue: 6 Linguagem: Inglês

10.1016/0021-9290(81)90056-7

1873-2380

Wolf W. von Maltzahn, Dieter Besdo, Wolfgang Wiemer,

Coronary Interventions and Diagnostics

A new two-layer cylindrical model is proposed to describe the nonlinear properties of carotid arteries. The stress-strain relationships in the two layers are established by two energy density functions. These are polynomials with only one coefficient for the inner isotropic layer and three coefficients for the outer anisotropic layer. The coefficients are directly related to the mechanical properties of the artery. No new experiments have been carried out. Instead, the two-layer model has been tested on experimental data found in the available literature. The agreement between experimental and theoretical curves lies within 2% accuracy which cannot be achieved with single-layer models. To facilitate comparisons with other models in the literature the stress and strain distributions, the moduli of elasticity, and Poisson ratios are computed for several physiological load conditions.