In this study, we investigate double-laminated glass plates under ballistic impact through experimental tests and numerical simulations. The are used to determine the limit velocity curve for laminated targets, create a basis comparison with We tested two different pane configurations: (1) one plate, (2) layers of separated by an airgap. finite element simulations that employed higher order ele...

The need to develop armour systems protect against attacks from various sources is increasingly a matter of personal, social and national security. To innovative it necessary monitor developments being made on the type, technology performance threats (weapons, projectiles, explosives, etc.) Specifically, use high protection level helmets battlefield essential. development evaluation methods tha...

Kevlar is a type of aramid fibers which is characterized by high strength to low weight ratio. This material is widely used in bulletproof vests and helmets, in which it creates a barrier to projectiles to protect specific objectives, laminated tubes and pressure vessels, etc. In this study the ballistic behavior of Kevlar /epoxy composite and Kevlar fabric is investigated. The results showed t...

Polyurea elastomer is known to exhibit advantageous impact-mitigation characteristics and thus can improve the dynamic performance of various components structures. This study identifies mechanisms response thin metallic plates, covered by a frontal polyurea layer, using physically verified, custom material model for two-part implemented within finite-element-method framework. A linear increase...

We introduce improved numerical techniques for simulating the structural and compositional evolution of planetary rings due to micrometeoroid bombardment and subsequent ballistic transport of impact ejecta. Our current, robust code is capable of modeling structural changes and pollution transport simultaneously over long times on both local and global scales. In this paper, we describe the meth...

The launch and impact points of a flight trajectory are estimated using U-D Kalman filter and Rauch-Tung-Striebel (R-T-S) smoother. Algorithms are implemented in PC MATLAB and validated using simulated data. The filter performance is evaluated in terms of state error, innovation sequence, and autocorrelation of residuals along with their theoretical bounds. The R-T-S smoother was found to gener...