PNNL

Abstract

The kinematics and kinetics of in-plane biaxial extension are revisited, and some enhancements are provided. The conventional stress-to-traction mapping for this boundary value problem (BVP) violates the conservation of angular momentum, which has been corrected by altering the mapping. A novel means for applying loads to in-plane biaxial experiments is proposed. An isotropic, isochoric, hypoelastic, constitutive model is applied to an in-plane biaxial experiment done on glutaraldehyde treated bovine pericardium. The experiment is comprised of eight protocols that radially probe the biaxial plane. The model does a good job of describing the non-linear normal responses observed in these experimental data, which are more prevalent than are the anisotropic responses exhibited by this tissue.