Effect of testing conditions on the mechanical response of aortic tissues from planar biaxial experiments: Loading protocol and specimen side

• Published in: Journal of the mechanical behavior of biomedical materials Vol. 111; p. 103882
• Main Authors: Sigaeva, Taisiya, Polzer, Stanislav, Vitásek, Radek, Di Martino, Elena S.
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier Ltd 01.11.2020
• Subjects: Animals; Biomechanical Phenomena; Constitutive modelling; Mechanical Phenomena; Planar biaxial testing; Porcine aortic tissue; Stress, Mechanical; Swine; Porcine aortic tissue; Constitutive modelling; Planar biaxial testing
• ISSN: 1751-6161; 1878-0180
• DOI: 10.1016/j.jmbbm.2020.103882

This study concerns procedural aspects of planar biaxial experiments on aortic tissues that have not been exhaustively addressed in the literature. The following questions are explored. First, is there a difference in the apparent mechanical properties if the experiments are conducted in a force-controlled regime or a displacement-controlled regime. Second, does it matter whether the deformations of the surface are tracked from one side of the tissue or the other (luminal vs. abluminal surface). The study provides answers to these questions with the help of a series of experiments on porcine aortic tissue, constitutive modelling and statistical analysis. It was found that the loading protocol does not substantially affect the constitutive response, while the surface orientation does. [Display omitted]