Experimental analysis of perforation of glass/polyester structures subjected to high-velocity impact

Abstract

a b s t r a c t a r t i c l e i n f o Keywords:Composite materials Sandwich Multiplate structure Impact behaviour Aerospace materialsIn this paper the ballistic behaviour of several glass/polyester laminate structures was studied, evaluating the residual velocity of the projectile and the damage area. Three monolithic laminates of different thicknesses and two multiplate laminate structures were analyzed: one of a sandwich type with face sheets of glass/ polyester and a foam core, and another made with the same face sheet, which were separated by a distance equal to the thickness of the core. It was found that laminates of greater thickness show a larger damage area and a greater ballistic limit. The influence of the core on the ballistic limit of multiplate laminate structures is negligible but, nevertheless, the extension of the damage area in the back face sheet is increased.

Influence of areal density on the energy absorbed by thin composite plates subjected to high-velocity impacts

“…These two values were selected because the model was previously compared with experimental results for both areal densities. 8,26 For both laminates, it can be seen that for impact energy below the perforation threshold the absorbed energy is a linear function of the impact energy, because all the energy of the projectile is absorbed. For these impact energies, the main mechanisms of absorbed energy are the fibre elastic deformation and the fibre failure.…”

Behavior of E-glass composite laminates under ballistic impact

“…Naik and Shrirao [16] compared ballistic impact behavior of plain weave E-glass/epoxy and twill weave carbon/epoxy composites and concluded that ballistic limit is higher for plain weave E-glass/epoxy than the latter. Buitrago et al [17] performed high velocity impact tests on E-glass/polyester laminates using spherical steel projectiles and found that the ballistic limit and the extent of the damage area increased with the thickness of the monolithic laminates. The effect of target thickness on ballistic performance of E-glass/epoxy and ultra high molecular polyethylene composites against FSPs has been studied and found to have bi-linear relationship between the target thickness and energy absorption [18, Materials and Design 84 (2015) [21] carried out parametric study on E-glass/polyester composites using 9 mm ogive and conical shaped lead projectiles and the results were compared with mathematical model and showed good agreement between the two correlations.…”

Nondimensional analysis of ballistic impact on thin woven laminate plates

“…9a), the energy absorbed by delamination and matrix cracking rise slightly with the density ratio, due to the increase ofĜ IICD andÊ MT (Eqs. (12) and (13)). …”

“…The data used was from high velocity impact tests on E glass/polyester plain woven lami nates, with a geometry ratio of 0.85 and 1.60, impacted by spherical steel projectiles 7.5 mm in diameter [12,20]. Table 1 shows the mechanical properties of this laminate, which registered at high strain rates [1,26,27].…”