VAFW cylinders 2020, S1, S2, S4, S8, DIC raw data

The files contain the raw data obtained with digital image correlation (DIC) of variable-angle filament-wound (VAFW) cylinders.

The data is used as an input for the stitching algorithm described in the paper:

Castro, S. G. P., Almeida, J. H. S., Jr., St-Pierre, L., & Wang, Z. "Measuring geometric imperfections of variable-angle filament-wound cylinders with a simple digital image correlation setup". Composite Structures, 2021. 10.1016/j.compstruct.2021.114497

With the methodology developed and explained in the paper, the Python module https://saullocastro.github.io/dicpp/ is used to reconstruct the 3D imperfections of the entire shell.

In the paper, the naming convention translates as follows.

Cylinder name in the dataset <--> cylinder name in the paper:

• S1 <--> MA
• S2 <--> CA
• S4 <--> VAFW4
• S8 <--> VAFW8

All coordinates (x,y,z) and the imperfection amplitude (imp) are in millimeters.

The extracted topology of the cylinders for each circumferential position 0deg, 60deg, 120deg, 180deg, 240deg and 300deg are contained in the individual ".zip" files for each measurement, e.g. "S1-1-measurement-1.zip". Inside this ".zip" file there are files named as "S1-1-measurement-XXXdeg.csv".

The large file "images.zip" contains all DIC pictures used for calibration and topology measurement, where:

"S1-1-cal-XXX.tif" are the pictures used for calibrating the DIC system

"S1-1-XXX.tif" are the pictures used to extract the cloud of points that represent the imperfect shell surface

"S1-1-XXX.out" and "S1-1*.z3d" are binary files saved by the Vic3D system