Key result
Dog-bone-shaped specimens achieved mid-sample failure in 85.2% of tests compared to 11.1% for rectangular specimens, making them optimal for aortic uniaxial tensile testing until rupture.
Why the study?
The study was conducted to identify the influence of specimen geometry and size on the results of aortic uniaxial tensile tests using custom-designed tissue cutters, clamps and molds.
Comparison
Dog-bone-shaped vs rectangular specimens of varying widths and orientations
Design
Biomechanical laboratory study
Authors
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May enhance aortic tensile test reliability; leaves open human tissue validation.
Absolute Event Rate: 85.2% vs 11.1%
Dog-bone-shaped specimens with a 4 mm width are optimal for uniaxial tensile testing of aortic tissue to rupture, as rectangular specimens predominantly fail near the clamps.
Pei et al. (2021) studied Aortic biomechanical properties (n=12). Dog-bone-shaped specimen geometry vs. Rectangular specimen geometry was evaluated on Mid-sample failure rate. Dog-bone-shaped specimens achieved mid-sample failure in 85.2% of tests compared to 11.1% for rectangular specimens, making them optimal for aortic uniaxial tensile testing until rupture.
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