Analysis of tow architecture variability in biaxially braided composite tubes

Spatial deviations in composite braid unit cell dimensions limit mechanical performance and are challenging to model. Full-field measurements of the irregular tow placement in biaxially braided composite tubes were obtained by digital image correlation. Analysis of the reconstructed tow paths showed...

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Bibliographic Details
Published in:Composites. Part B, Engineering Engineering, 2020-06, Vol.190 (C), p.107938, Article 107938
Main Authors: Heim, Frederick M., Daspit, John T., Holzmond, Oliver B., Croom, Brendan P., Li, Xiaodong
Format: Article
Language:English
Subjects:
3-Dimensional reinforcement
Defects
Polymer-matrix composites (PMCs)
Surface analysis
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Summary:Spatial deviations in composite braid unit cell dimensions limit mechanical performance and are challenging to model. Full-field measurements of the irregular tow placement in biaxially braided composite tubes were obtained by digital image correlation. Analysis of the reconstructed tow paths showed long-range defects along the hoop direction with short-range defects dominating the biased tow direction. A route toward numerical simulation of the composite response is established by developing a 3D model of the composite using the measured tow trajectories. Finally, a comparison to previously-published triaxial braid results indicates axial tows work to constrain unit cells dimensions along the hoop direction.
ISSN:1359-8368
1879-1069
DOI:10.1016/j.compositesb.2020.107938