A three-dimensional strain measurement method in elastic transparent materials using tomographic particle image velocimetry
Fig 4
Influence of interrogation voxel size on the 3D strain measurements of specimens with a particle density of 0.014 ppp using Tomo-PIV.
Interrogation voxel sizes of 32 × 32 × 32, 40 × 40 × 40, 48 × 48 × 48, 56 × 56 × 56, and 64 × 64 × 64 voxels for the specimen were compared at the cross section Z = 0 mm. (a) Distributions of the correlation values between the first two successive 3D images and the normal strain. (b) Correlation value between the first two successive 3D images. (c) Normal strain. (d) Measurement error of the normal strain.