Title: Assessment of Material Flow during Projectile Penetration of Concrete Targets
Author(s): Girum Urgessa and Robert Sobeski
Publication: Symposium Paper
Appears on pages(s): 230-248
Keywords: projectile penetration, impact, finite element analyses, material flow, concrete targets
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.