Fracture Failure Mechanisms of Long Single PA6 Fibers

Abstract

The present study investigates the failure mechanisms of industrial fiber materials, using a custom designed fiber cutting performance test bench. The fracture morphologies of single PA6 fibers are examined by scanning electron microscopy. The analysis reveals that fiber cutting can be distinguished according to four distinct stages of fiber failure represented by shearing, cutting, brittle fracture, and tensile failure, which are the result of different mechanisms active during the processes of crack initiation, extension, and fracture. The results of fractographic analysis are further verified by an analysis of the blade assembly speed with respect to time over the entire fracture failure process based on high-speed camera data. The results of fractographic analysis and blade assembly speed are fully consistent.

Rice Husk with PLA: 3D Filament Making and Additive Manufacturing of Samples for Potential Structural Applications

“…Regarding details of the fractured surfaces, PLA is a quite ductile polymer, and besides these fractured surfaces that were made under liquid nitrogen, the typical fractured zones can be identified [ 45 , 46 ]: an initial crazing-shearing zone, a cutting zone, a brittle zone, and a tensile zone, at the end of the fracture. Probably because of the preparation, almost no dust is observed.…”