Figure 4. Stress comparisons among the reference, conventional, and linear models of an axisymmetric thick-wall tubular geometry.

(A) Circumferential wall stress; (B) effective wall stress; and (C) radial wall stress distributions are plotted across the normalized wall thickness. For the reference model, the inner and outer radii in the deformed configuration were 14.8 mm and 16.1 mm, respectively; for the conventional model, the inner and outer radii in the deformed configuration were 16.27 mm and 17.53 mm, respectively; applied internal pressure, p = 0.016 N/mm² (120 mmHg); RV material properties were used for both the reference and conventional models.