Fig. 10.

Propagation of DIC uncertainty into strain calculation uncertainty for an idealized numerical sphere: (a) meridional and (b) circumferential strains over a 12.5-mm sphere subjected to a 200 -μm radial inflation with DIC uncertainty (described as a Gaussian distribution of displacements, 195 ± 12 μm, based on previous work [31]). The resulting strain variation of 1.61 ± 0.071 % for the meridional direction and 1.59 ± 0.056 % for the circumferential direction is nearly equivalent to the 1.61 % theoretical uniform strain.