The Effect of Strain Rate and Ply Geometry on the Stress-Strain Properties of Nylon Yarns

摘要

The purpose of the study was to examine the changes that take place in the stress-strain behavior of plied yarns due to the differences in straining rates, and also the effects that yarn geometry has on these changes. A series of 12 nylon plied yarns, representing a gradual buildup in geometric complexity, was examined. Ply structure was varied by twisting two, three, five and seven strands to various levels. Yarns were identified in terms of their ply torsion. Tensile strength, elongation and work-to-break were measured for all samples at strain rates of 100 and 288,000%/min. These properties were then compared to geometric torsional levels. (Author)