TY - JOUR
T1 - Study on the Bending Fatigue Behavior of Single Aramid Fibers by a Novel Bending Fatigue Test Method
AU - Guangming Cai, Wenfang Song, Xin Cui & Weidong Yu 
JO - Journal of Fiber Bioengineering and Informatics
VL - 1
SP - 13
EP - 22
PY - 2014
DA - 2014/07
SN - 7
DO - http://doi.org/10.3993/jfbi03201402
UR - https://global-sci.org/intro/article_detail/jfbi/4763.html
KW - Test Method
KW - Bending Fatigue
KW - Kevlar 49 Fiber
KW - Cyclic Tension
KW - Fracture Morphology
AB - In this paper, we report a bending fatigue testing apparatus which can test the bending fatigue resistance
of single Kevlar 49 fiber by setting the pretension and bending angle. The cyclic tension and the (number
of cyclic bending of fiber) were recorded by this apparatus. The cyclic tension curve showed that the
tension changes in periods during the bending fatigue process. The cyclic tension was theoretically
analyzed and found that the bending angle had significant effect on the cyclic tension. The cyclic
bending number N of Kevlar 49 fiber was plotted as a function of pretension S using S-N curves, which
shows that the bending angle and pretension have a significant effect on the fatigue lifetime of a fiber.
The bending fatigue morphologies of Kevlar 49 fiber explained the bending failure mechanism of the
Kevlar 49 fibers.