K. Gramoll et S. Ramaprasad, EFFECTS OF BAND WEAVING ON FIBER STRENGTH IN FILAMENT-WOUND COMPOSITESTRUCTURES, Composites engineering, 5(4), 1995, pp. 363-373
Filament winding of composite structures generally causes fiber bands
to weave or undulate throughout the structure in a non-periodic fashio
n, except for hoop-only winding. This causes the filament-wound fiber
bands, made from multiple groups of filaments, called tows, to fail be
low the fiber strength of straight fibers. This fiber failure strength
reduction is investigated by performing a finite element stress analy
sis and developing a strength-of-material type closed-form solution fo
r curved fibers. The stress analysis results from both methods are com
pared to actual test results conducted on single and double type weave
patterns. The predicted failure stress from the analysis closely matc
hes the experimental results. Application of this work to filament-wou
nd composite pressure vessels is discussed.