Investigation of penetration resistance using a new modification of the Alekseevskii-Tate model

Abstract

On the basis of a new modification of Alekseevskii-Tate model for penetration of long rods into ceramics (B. Galanov, S. Ivanov, V. Kartuzov, Int. J. Impact Engng., 26 (2001) 201-210) a penetration (target) resistance is investigated. The model continuously describes two main phases of penetration thus giving an opportunity to analyze the penetration phenomena. Three components of its resistance were separated and conditionally named as static, kinematics, and dynamic. New penetration characteristics, namely, a work of contact pressure (density of penetration work per unit of target surface) and penetration hardness (work per unit of penetration volume) are introduced. Structure of these characteristics is investigated. Instead of using the static tensile strength (STS) of ceramics in the static component of target resistance it is proposed to introduce the contact tensile strength (CTS) of ceramics, which definition was developed by B. Galanov, O. Grigoriev et al. (Electronic Microscopy and Strength of Materials. Ser. Physical Materials Science, Structure and Properties of Materials, issue 11 (2001) 125-135). It was made with statistical mechanics of the formation of radial cracks in the neighborhood of hardness impression on sample surface. The results were used for the comparative analysis of ceramic armor materials.