A new ballistic material model for 0 deg/90 deg cross-plied oriented ultra-high molecular weight (UHMW) polyethylene fiber-based armor-grade composite laminates has been constructed using open-literature data for the fiber and polymeric-matrix material properties and the general experimental/field-test observations regarding the deformation and failure modes in these types of materials. The present model is an extension of our recently developed unit cell-based ballistic material model for the same class of composites (M. Grujicic, G. Arakere, T. He,W.C. Bell, B. A. Cheeseman, C.-F. Yen, and B. Scott, A ballistic material model for cross-plied unidirectional ultra-high molecular-weight polyethylene fiber-reinforced armor-grade composites, Mater. Sci. Eng, A 2008, 498(1-2), p 231-241) which was found to be physically sound, but computationally not very efficient. The present model is constructed in such a way that it can be readily integrated into commercial finite element programs like ANSYS/Autodyn (ANSYS/Autodyn version 11.0, User Documentation, Century Dynamics Inc., a subsidiary of ANSYS Inc., 2007), as a User Material Subroutine. To validate the model, a series of transient nonlinear dynamics computational analyses of the transverse impact of armor-grade composite laminates with two types of bullets/projectiles is carried out and the computational results compared with their experimental counterparts. Relatively good agreement is found between the experiment and the computational analysis relative to: (a) the success of the armor panels of different areal densities in defeating the bullets at different initial bullet velocities; (b) postmortem spatial distribution of the damage modes and the extents within the panels; (c) the temporal evolution of the armor-panel back-face bulge; and (d) The existence of three distinct armor-penetration stages (i.e., an initial filament shearing/cutting dominated stage, an intermediate stage characterized by pronounced filament/matrix debonding/decohesion, and a final stage associated with the extensive filaments extension and armor-panel back-face bulging).
Material modeling and ballistic-resistance analysis of armor-grade composites reinforced with high-performance fibers
Werkstoffmodellierung und Analyse der ballistischen Beständigkeit von waffentauglichen hochleistungsfaserverstärkten Verbundwerkstoffen
Journal of Materials Engineering and Performance ; 18 , 9 ; 1169-1182
2009
14 Seiten, 37 Quellen
Article (Journal)
English
Fehleranalyse , Schichtwerkstoff , militärische Ausrüstung , Geschoss (Munition) , Qualitätssicherung , Sicherheitsfaktor , Hochleistungsfaser , Polyethylenfaser , Größenverteilung , Flächendichte , Beschussprüfung , Polyethylen hoher Dichte , Faserorientierung , Polymermatrix-Verbundwerkstoff , Beulen
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