Abstract

*† ‡ This paper presents the modeling evolution of both the implicit and explicit analysis, ballistic testing, and experimental comparison for three distinct structural concepts for aircraft composite structure: conventional honeycomb sandwich structure, conventional skin stringer structure, and a large cell graphite honeycomb sandwich structure. The authors have exploited the capabilities of the analytical hydrocode, LS-DYNA®, to provide a robust tool set for advanced ballistic analysis. This paper will present the development and evolution of modeling techniques and material parameters in addition to comparisons between simulation results and experimental data in terms of strain survey results, deformation, and post-damage inspection, as well as high speed photography. The objective of the work presented is to provide the capability to more accurately predict the response of airframe structure to a high explosive projectile impact event.

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