Braided composites are manufactured using a device known as a Maypole braider.  Yarns are interlaced onto a mandrel in order to form the tubular braid preform.

3D DIC Measurement of Tubular Braided Composites

Three dimensional digital image correlation (3D DIC) is a full field strain measurement method that uses cameras in order to optical measure displacement and strain. 3D DIC is highly useful for evaluating the repeating strain field of tubular braided composites.

Source: Melenka, G. W., & Carey, J. P. (2017). Experimental analysis of diamond and regular tubular braided composites using three-dimensional digital image correlation, (3d Dic). Journal of Composite Materials https://doi.org/10.1177/0021998317695418

Micro-Computed Tomography of Tubular Braided Composites

Source: Melenka, G.W., Lepp, E., Cheung, B.K., Carey, J.P., Micro-computed tomography analysis of tubular braided composites, Composite Structures, 100, 384-396