Analytical investigation of high-velocity impact on hybrid unidirectional/woven composite panels

Abstract

In addition to fiber properties, the fabric structure plays an important role in determining ballistic performance of composite body armor textile. Textile structures used in ballistic protection are woven fabrics, unidirectional fabric structures and nonwoven fabrics. In this paper an analytical model based on wave propagation and energy balance between the projectile and the target is developed to analyze hybrid fabric panels for ballistic protection. The hybrid panel consists of two types of structure, woven fabrics as the front layers and unidirectional (UD) material as the rear layers. The model considers different cross sections of surface of the target in the woven and unidirectional fabric of the hybrid panel. Also the model takes into account possible shear failure by using shear strength together with maximum tensile strain as the failure criteria. Reflections of deformation waves at interface between the layers and also the crimp of the yarn are modeled in the woven part of the hybrid panel. The results show that the greater efficiency of woven fibers in front (more shear resistance) and unidirectional yarns in the rear (more tensile resistance), lead to better ballistic performance. Also modeling the yarn crimp results in more trauma in the backface of the panel producing data closer to the experimental results. It was found that there is an optimum ratio of woven to UD materials in the hybrid ballistic panel.

Ballistic performance of Kevlar fabric impregnated with nanosilica/PEG shear thickening fluid

“…High strength and toughness fabrics such as Kevlar, Twaron and Spectra and composites made from these fabrics are usually used as soft body armor [3,4]. During the last decade numerous researches have been carried out on the high velocity impact on high strength fabric structures [5][6][7][8].…”

Ballistic penetration damages and energy absorptions of stacked cross-plied composite fabrics and laminated panels

“…(Chen et al., 2014) found that the front layers of fabric are more likely to be broken in shear, and the rear layers of fabric tend to fail in tension. Shanazari et al. (2017) developed an analytical model based on wave propagation and energy balance between the projectile and the target to analyze hybrid fabric panels for ballistic protection.…”

Experimental and numerical study of the damage mechanisms in hybrid unidirectional/woven composites under impact loading

“…The studies found deal with ballistic performance of thick hybrid composite panels for body armors [39,40] or low velocity impact on UD composite laminate positioned between two ply of 5HS fabric carbon to protect it [41].…”