Destructive techniques are techniques in which the sample is decomposed by a reagent and then the concentration of the element in the aqueous extract determined by a physical technique.

If the structural element of the stent is symmetrical, the uniform stress appears by force, furthermore, the stress concentration is avoided effectively, and the maximum stress decreases obviously.

Since blocked diaphragms have a greater concentration of fasteners around the perimeter of each sheathing element, blocked diaphragms provide greater shear capacities than unblocked diaphragms.