Title: Assessment of Material Flow during Projectile Penetration of Concrete Targets

Author(s): Girum Urgessa and Robert Sobeski

Publication: Symposium Paper

Volume: 347

Issue:

Appears on pages(s): 230-248

Keywords: projectile penetration, impact, finite element analyses, material flow, concrete targets

DOI: 10.14359/51732667

Date: 3/1/2021

Abstract:

This paper presents qualitative and quantitative assessment of material flow response during projectile penetration of concrete targets using outputs from the finite element analysis. The assessment included two parts. First, the movement of the comminuted concrete was analyzed by examining the normal expansion of meshless particles using NECM (Normal Expansion Comparison Methodology). Second, the expansion of finite element nodes adjacent to meshless particles was analyzed by observing direction cosines and velocity profiles of the nodes using SECM (Spherical Expansion Comparison Methodology). This assessment is important to re-examine simplified assumptions used in analytical penetration depth equations that were developed without providing adequate insight into material flow.