Through further research, we have realized
that it is now possible to predict the strengths
of twisted yarns based on Daniels’ model [GI for
parallel fiber bundle and the results on yarn mechanics
by the present author to study
theoretically the relationships between the properties
of the constituent fibers, the structural parameters
of a twisted fiber structure, and its statistical
strength. The effects of inter fiber friction
and the fiber fragmentation mechanism during
yarn extension can be included.