Pyramidal ceramic armor ability to defeat projectile threat by changing its trajectory

Abstract

Abstract. This paper presents a numerical study of a multilayer composite panel impacted by an AP (Armor Piercing) 14.5 × 114 mm B32 projectile. The composite consists of alternating layers of hard ceramic and a ductile aluminum alloy. While the alloy layer consists of typical plate, ceramics confront projectiles in the form of ceramic pyramids. The studied models are compared with a reference structure, which is a standard double layer panel.The problem has been solved with the usage of modeling and simulation methods as well as a finite elements method implemented in LS-DYNA software. Space discretization for each option was built with three dimensional elements ensuring satisfying accuracy of the calculations. For material behavior simulation, specific models including the influence of the strain rate and temperature changes were considered. A steel projectile and aluminum plate material were described by the Johnson-Cook model and a ceramic target by the JohnsonHolmquist model.The obtained results indicate that examined structures can be utilized as a lightweight ballistic armor in certain conditions. However, panels consisting of sets of ceramic prisms are a little easier to penetrate. Despite this fact, a ceramic layer is much less susceptible to overall destruction, making it more applicable for the armor usage. What is most important in this study is that significant projectile trajectory deviation is detected, depending on the impact point. Such an effect may be utilized in solutions, where a target is situated relatively far from an armor.

Assessment of the Impact Resistance of a Composite Material with EN AW-7075 Matrix Reinforced with α-Al2O3 Particles Using a 7.62 × 39 mm Projectile

“…Such materials include ceramics, polymers, and composites, which are now a new option [10][11][12][13][14]. Each material and composite should meet the need for continuous improvement in the development of missiles and weapons, and, under specific conditions, new applications [15][16][17].…”

Numerical study of the influence of gaps between tiles and backing type on overall high-velocity impact performance of a ceramic-faced protective structure

“…To consider deformation and fracture of brittle materials under high pressure and high strain rates, several constitutive models were developed and implemented into numerical codes. The Johnson-Holmquist strength and failure models (JH-1 and JH-2) [36,37] are the most commonly used for modelling of ceramic material under the high-velocity impact. Examples of this model application can be found in [18,28,36,37].…”

“…The Johnson-Holmquist strength and failure models (JH-1 and JH-2) [36,37] are the most commonly used for modelling of ceramic material under the high-velocity impact. Examples of this model application can be found in [18,28,36,37]. However, to determine the material parameters for numerical analysis, these models require a large number of expensive and complicated experiments like Depth-Of-Penetration (DOP) tests.…”

“…Stanislawek et al numerically studied several ceramic-faced composite panels with the front layer consisted of ceramic hemispheres [34], hexagonal bars [35, and tetrahedrons [36]. It was observed that the energy absorption capabilities of the multi-piece ceramic panel were easier to penetrate in comparison with a reference structure.…”

Experimental testing and numerical simulations of blast-induced fracture of dolomite rock

“…The most commonly used are the Johnson-Holmquist Concrete model (JHC model; sometimes referred to as the Holmquist-Johnson-Cook model) [36,37], the brittle damage model [22,38], the Federal Highway Administration (FHWA) soil model [13,39], the Riedel-Hiermaier-Thoma (RHT) model [3,40], the Continuous Surface Cap (CAP) model [38,41], and the Karagozian and Case Concrete (KCC) model [42,43]. Among constitutive models, the Johnson-Holmquist II (JH-2) model has been extensively used to reproduce the behavior of brittle and geomaterials under dynamic or impact loading conditions [15,18,[44][45][46][47][48][49][50][51].…”