Analytical and experimental study of high-velocity impact on ceramic/nanocomposite targets

Abstract

In this paper, an analytical model has been developed for modeling high velocity impact on ceramic/nanocomposite targets. In this model penetration resistance of ceramic is determined based on cavity expansion analysis and variables during perforation of projectile onto ceramic are considered. Also semi-angle of ceramic conoid is modified. This angle depends on impact velocity and changes during perforation process. For modeling the back-up composite laminate, the kinetic and strain energy of yarns and shear plugging have been determined. A failure model based on the energy absorption until failure of laminate composite is used. Ballistic impact tests were performed to validate the analytical predictions. These tests were performed by firing 10 mm steel flat ended projectile onto ceramic/composite target. Front layer is alumina ceramic and composite laminates of back up made of E-glass/epoxy with and without nano zirconia particle of 5 wt%. The effect of nano zirconia dispersion in the matrix for different failure modes is discussed. Experimental results revealed an improvement in the ballistic performance of samples with nano zirconia particle. The analytical predictions of ballistic limit velocity and residual velocity of projectile are found to be in good agreement with the experimental results.

On Analytical Ballistic Penetration Fundamental Model and Design

“…Finally, a few words on the elastic composite armor penetration will be mentioned. One might observe that in case of armor composite elastic behavior [24,[43][44][45][46][47][48][49][50][51][52], there are four types of ballistic mechanical mechanisms: Fibres tension mechanism (e.g., Kevlar woven layer, see Figs. 16-6, 9-10 in Ref.…”

Improvement of the Impact Properties of Composite Laminates by Means of Nano-Modification of the Matrix—A Review

“…For nano-particulate materials, such as nanosilica, debonding and subsequent plastic void growth were most likely to be responsible for the increase in fracture toughness [92]. The nanoparticles were also found to reduce the damage area and increase the absorbed energy resulting from low velocity impact [64,68,69,90,93,94] and ballistic impact [70,71,95], with more tangible effects in the ballistic impact compared with quasi-static loading [96]. A higher residual shear strength after impact resulted by the Nano particles modification [70], however, the ultimate laminate compression strength after impact was not necessarily improved [64,68], most probably due to agglomerates of nanoparticles found in the cured resin systems.…”

Numerical modeling and analysis of the ballistic impact response of ceramic/composite targets and the influence of cohesive material parameters

“…Broadly, ceramic materials play a major role in impact resistance due to their high strength and hardness properties as reported in Krell and Strassburger (2008). The possible damages that may occur in ceramic tiles under ballistic impact are mainly in the forms of tensile failure, transverse cracking, shear plugging and pulverization (Shanazari et al, 2017). When reaching the composite layer, it passes also into a very complex ballistic penetration mechanisms.…”