AnInvestigation of the Ballistic Impact Resistance of Modified 2x1, Four-step, Three-Dimensionally Braided Composites with Axial Reinforcement

[摘要] The primary objective of this research was to determine the ballistic resistance of Modified 2x1, 4-step, 3-D braided Kevlar® and Spectra® fiber/epoxy composites with axial reinforcement.Four different preform constructions were evaluated, specifically: Kevlar® with Kevlar® axials, Spectra® with Spectra® axials, Kevlar® with Spectra® axials, and Spectra® with Kevlar® axials.The preforms were fabricated on the computer-controlled, fully automated, 3-D braiding machine developed at The College of Textiles, NC State University.The preforms were consolidated in epoxy matrix and then subjected to dynamic impact utilizing the 19-mm variable velocity impactor designed and built at the Mechanical Engineering Department, NC State University.The composites in the study were fabricated to be similar in fiber volume, thickness, and areal density.This was accomplished using computer-aided design and standard fabrication methodology. The testing of the composite materials was conducted such that the impact energy of subsequent shots fired was similar so that direct comparison of material systems could be made.This research was conducted under a controlled dynamic testing environment.

[发布机构] University:North Carolina State University

[关键词] textile