Experimental and computational analysis of aortic dissection

Abstract eng:
We elaborate on the mechanical strength of human thoracic aortas, in particular of harvested tissues in which a dissection occurred. Results suggest that the media has a much lower resistance to rupture under in-plane than under out-of-plane shear loading, while the tensile strength is lowest in the radial direction. A phase-field approach was used to computationally capture the obtained data, whereby an energy-based anisotropic failure criterion was developed to drive the crack phase-field. Finite element results of a simple shear test are shown and in favorable agreement with experimental data.

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