The Determination of the Constitutive Equation of Arteries in Zero Stress State Using the Least Square Fit

The residual strains of arteries wall are calculated from measuring the configurations of blood vessels in zero stress state under non-loading condition.Furthermore,the Functional parameters of the strain energy density are calculated from the distribution of residual strains and the balance equation using the least square fit.Therefore,the constitutive equation of arteries could be determined through analying the arteries in zero stress and non-loading conditions.