Through further research, we have realized
that it is now possible to predict the strengths
of twisted yarns based on Daniels’ model 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.