VAFW Cylinders: Geometric Imperfection Data from DIC Measurements

Delft University of Technology researchers provide raw data from digital image correlation (DIC) measurements of variable-angle filament-wound (VAFW) composite cylinders. The dataset contains 3D coordinate and imperfection amplitude data for four cylinders (S1, S2, S4, S8) at six circumferential positions, used to reconstruct full-shell surface imperfections. It supports the methodology described in a 2021 Composite Structures paper and an associated Python module for data stitching.

Use Cases

• Validating DIC-based stitching algorithms for full-shell imperfection reconstruction based on the provided point-cloud data.
• Benchmarking finite element models of composite cylinders against measured geometric imperfection amplitudes.
• Developing new surface reconstruction techniques using the provided multi-angle .csv files and calibration images.
• Studying the manufacturing variability in variable-angle filament-wound structures using the raw coordinate data.

Strengths

• Data is directly linked to a peer-reviewed 2021 publication in Composite Structures, providing methodological context.
• Includes raw calibration images (.tif) and binary system files (.out, .z3d) alongside processed point-cloud data, offering traceability.
• Covers four distinct cylinder specimens with measurements at six standard circumferential positions (0, 60, 120, 180, 240, 300 degrees).

Limitations

• Key metadata such as row count, file size, and specific column names are not provided across any source.
• The dataset's last update date is unknown, raising questions about its maintenance and potential newer versions.
• Descriptions are repetitive across platforms, suggesting limited independent curation or expanded documentation.

Provenance

Source

Saullo G. P. Castro, Delft University of Technology

Collection Method

Raw data obtained via a simple digital image correlation (DIC) setup, processed using the Vic3D system.

Time Range

2020 (inferred from dataset title 'VAFW cylinders 2020')