Perforation of a Small Caliber Projectile Into Textile/Epdxy Composite Targets

Abstract

An experimental program has been conducted to study the normal perforation of a small caliber projectile into textile/epoxy composite targets. This program is concerned with the determination of ballistic resistance for a set of targets, consisting of kevlar/epoxy and S-2 glass/epoxy composites with different thicknesses. The used textiles (kevlar-129 and S-2 glass) for manufacturing the composites have a new weave shape (3D weave TM), which permits the epoxy resin to diffuse through it. In addition, tensile tests of manufactured composite specimens are performed to determine their mechanical properties. The analytical model developed by Taylor and Vinson [1] is adopted herein to describe the penetration of a small caliber projectile into a textile/epoxy composite target. The selected model uses the circumferential strain as a failure criterion for a composite target. The main assumptions and equations representing the analytical model are presented. These equations are arranged and compiled into a computer program. The input data to run the program are easily determined. The ballistic measurements of the experimental program are compared with the model predictions; good agreement is generally obtained. The obtained results show that the tested composites with different thicknesses have a limited ballistic resistance against the used projectile. Moreover, other types of epoxies are recommended be used for manufacturing the composites and the effect of epoxy type as well as the delamination between composite layers on their ballistic resistance must be considered.

BALLISTIC RESISTANCE OF FLEXIBLE COMPOSITE (KEVLAR-129/LINE-X xs 350)

“…The figure shows that the trend of energy absorbed by each target increases with the increase of the impact energy. These results are in agreement with those of Fayed [7], who tested 3D weaver"" Kevlar-129/Epoxy and S-2 Glass/Epoxy targets against the impact of 7.62 mm projectile at the range of velocities from 220 m/s up to 580 m/s.…”

“…Fayed, et al [7], studied normal perforation of a small caliber projectile into textile /epoxy composite targets. They used a Kevlar-129 and S-2 glass textiles for manufacturing the composite which had a new weave shape (3D weave Tm).…”

Ballistic Resistance of Flexible Composite and Textile Targets

“…The figure shows that the energy absorbed by each target increases with the increase of the impact energy. These results are in agreement with those of Fayed [7,8].…”

“…For instance, Fig. (20) Depicts experimental as well as predicted residual velocity change with impact velocity for 9-layer Kevlar 129/epoxy target [8], predictions being obtained using the current model are also plotted on the same figures. It is clear that the three responses are in fairly good agreement.…”

“…Fayed, et al [8], studied the normal perforation of a small caliber projectile into textile /epoxy composite targets. They used a Kevlar-129 and S-2 glass textiles for manufacturing the composite which had a new weave shape (3D weave TM ).…”