A Ballistic Material Model for Cross-Plied Unidirectional Ultra-High Molecular-Weight Polyethylene Fiber-Reinforced Armor-Grade Composites
CLEMSON UNIV SC
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The known fiber and polymeric-matrix material properties, unit-cell microstructural characteristics and unit-cell level finite-element analyses are used to construct a new ballistic material model for 0 deg90 deg crossplied oriented polyethylene fiber-based armor-grade composite laminates. The model is constructed in such away that it can be readily integrated into commercial finite-element programs like ANSYSAutodyn ANSYSAutodyn version 11.0, User Documentation, Century Dynamics Inc., a subsidiary of ANSYS Inc., 2007 and ABAQUSExplicit ABAQUS version 6.7, User Documentation, Dessault Systems, 2007 as a user material subroutine. To validate the model, a series of transient non-linear dynamics simulations of the transverse impact of armor-grade composite laminates with two types of bulletsprojectiles is carried out. The results obtained are next compared with their experimental counterparts. This comparison revealed that a relatively good agreement is obtained between the experimental 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 post-mortem spatial distribution of damage within the panels c the temporal evolution of a bulge at the back-face of the armor and d the existence of three distinct armor-penetration stages i.e. an initial filament shearingcutting dominated stage, an intermediate stage characterized by pronounced filamentmatrix de-bondingdecohesion and the final stage associated with the extensive bulging of the armor panel.
- Laminates and Composite Materials