A Phenomenological Description of the Failure of Nonuniform Threads with Obstruction at Weak Sites

Resumo

The mechanics of twisted threads with rectilinear core, which serves to describe the failure of both individual components as well as the thread as a whole, is analyzed. The article proposes a hypothesis according to which obstruction of weak sites of the core thread by a contact load from the direction of the winding thread with loading of the composite (core-spun) thread may serve to account for the observed extremal variation in strength.