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Characteristic Stress

In a living structure whose shell is made of spherical or partial sphere shapes, the stresses in the surface of these segments (Choose the most correct answer)
A. never achieve a point of zero stress
B. have circumferential stress equal to 2x the longitudinal stress
C. have circumferential stress equal to 2x the axial stress
D. are equal in both directions



Answer is D. equal in both directions (this is akin to soap bubbles-spherical membranes).

Statement A is used to describe the stress-strain curve in animal tissue (veins, arteries). B describes the skin of a cylinder (or pipes). C describes a characteristic of rubber-like materials (rubber tubes).
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