New method for predicting perforation parameters of a concrete slab target to a penetrating projectile. (April 2023)

• Record Type: Journal Article
• Authors: Feldgun, V.R.; Yankelevsky, D.Z.; Karinski, Y.S.
• Is Part Of: International journal of impact engineering. Volume 174(2023)
• Publication Date: 2023-04
• Subjects: Penetration -- Perforation -- Concrete slab -- Rigid projectile -- Residual velocity -- Pseudo residual velocity -- Ballistic limit -- Perforation limit; Impact -- Periodicals; Shock (Mechanics) -- Periodicals; Impact -- Périodiques; Choc (Mécanique) -- Périodiques; Impact; Shock (Mechanics); Periodicals; 620.1125
• DOI: 10.1016/j.ijimpeng.2023.104512
• Languages: English
• ISSNs: 0734-743X

Abstract

Highlights: A new approach to analyze perforation parameters of a concrete slab is developed. The major parameters are: residual velocity, perforation and ballistic limits. A new concept denoted the pseudo residual velocity (Vp) is introduced. The developed approach is based on the Vp-concept. Present approach predictions of numerous test data show very good agreement. Abstract: The present paper investigates the perforation of a projectile through a concrete slab and proposes a new approach for assessing the perforation parameters, including the projectile residual velocity, and the slab perforation and ballistic limits. The new approach is rather simple and easy to implement and provides a fast solution. A new parameter denoted the "pseudo-residual velocity ( VP ) " is defined and is theoretically calculated. For a given slab thickness H 0, the magnitude of V P ( H0 ) is always smaller than the corresponding true residual velocity. The developed approach reduces the determination of the perforation parameters to a sequence of pseudo-perforation problems that are quickly solved using the modified (hybrid) DISCS method, which had been developed for penetration analysis into thick targets, using the constitutive equations of the slab concrete material. In contrary to many other simplified models, the proposed approach is based on a theoretical model and engineering insight and does not require any empirical constants, or calibrations prior to the analysis. Numerous examples compare the proposed approach predictions to test results, covering different types of concrete, slab thicknesses and projectile impact velocities. In all comparisons, very good predictions of the proposed approach are demonstrated.