Consideration of Yarn Anisotropy in the Investigation of the Puncture Resistance of Fibrous Materials

Abstract

High-performance yarns are widely used to produce protective fabrics, including stab-resistant materials. The most common approach to studying the mechanism of puncture prevention is to use simulation to assist analysis. However, the anisotropy of the yarn is often overlooked during simulation owing to various factors. In fact, there is a marked difference between the axial and radial properties of a yarn. This may lead to large errors in research. In the present study, a composite material with a grid structure for puncture analysis was designed to investigate the influence of yarn anisotropy on the accuracy of simulation results. The present study combined an actual experiment with a simulation. In the actual experiment, Kevlar yarn/epoxy resin was used to prepare a mesh composite with a spacing of 1 mm. In the simulation, a 1:1 simulation model of composite material was established using finite element software. A simulated puncture experiment was conducted based on the actual experimental conditions and material parameters. After considering yarn anisotropy, the simulation results were closer to the actual experimental results. The simulation revealed that the main failure modes of the mesh material were the fracture of the resin and the bending deformation of the yarns at the junctions, while the surrounding areas were almost unaffected.

Study on anti-stab resistance of aramid fabrics treated by sol-gel technology

“…It is an important method to obtain the uniformity of molecular level dispersion in a short time and prepare nanoparticles under low temperature or mild conditions. Sol-gel technology combines gel and ber molecules to improve a series of mechanical properties of the fabric, such as hardness and friction between fabrics, so as to obtain better mechanical properties of the composite material [31] . This is also the rst time to explore the application of sol-gel technology in puncture resistance [32][33][34] .…”