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#19253, The Stress Relaxation Response of the Porcine Descending Aorta under Combined Normal and Torsional Loadings

Understanding the mechanical properties of aortic tissue is crucial for improving future medical interventions related to cardiovascular diseases. Our group has previously investigated the uni-axial, bi-axial, and shear responses of the porcine thoracic aorta. In this study, we explore the stress relaxation of the porcine aorta under torsional shearing while maintaining a constant normal compressive load. Circular samples, measuring 0.5 inches in diameter, were extracted from the descending section of porcine thoracic aortas. Stress relaxation experiments were conducted at a constant shear strain ranging from 10 to 50% while maintaining a compressive strain ranging from 5 to 25%. We observed that the stress relaxation behavior differs between the normal and torsional shear directions. Moreover, results suggest that neither the normal or shear stress relaxation behavior of the porcine aorta is not significantly influenced by the degree of compressive strain or shear strain applied.

Luc Nguyen   Texas A&M University
Abdelrahman Youseff   Texas A&M University
Calvin Nguyen   Texas A&M University
Kirtan Patel   Texas A&M University
Jack Luce   Texas A&M University
Benjamin Tijerina   Texas A&M University
Chandler Benjamin   Texas A&M University