The orthotropic viscoelastic behavior of aortic elastin.

摘要: In this paper, we studied the viscoelastic behaviors of isolated aortic elastin using combined modeling and experimental approaches. Biaxial stress relaxation creep experiments were performed to study time-dependent behavior elastin. Experimental results reveal that preconditioning is necessary in order obtain repeatable responses. Elastin exhibits less than intact or decellularized aorta. The rate aorta linearly dependent on initial levels. for increases at levels below about 60 kPa; however, changes very slightly higher also show response negligible elastin, A quasi-linear viscoelasticity model was incorporated into a statistical mechanics based eight-chain microstructural fiber level simulate orthotropic user material subroutine developed finite element analysis. Results demonstrate suitable capture both hyperelasticity