Multi-Scale Ballistic Material Modeling of Cross-Plied Compliant Composites
CLEMSON UNIV SC
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The open-literature material properties for fiber and polymeric matrix, unit-cell microstructural characteristics, atomic-level simulations and unit-cell based finite-element analyses are all used to construct a new continuum-type ballistic material model for 0 deg90 deg cross-plied highly-oriented polyethylene fiberbased armor-grade composite laminates. The material model is formulated in such a way that it can be readily implemented 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. Model validation included a series of transient non-linear dynamics simulations of the transverse impact of armor-grade composite laminates with two types of projectiles, which are next compared with their experimental counterparts. This comparison revealed that a reasonably good agreement is obtained between the experimental and the computational analyses with respect to a the composite laminates capability, at different areal densities, to defeat the bullets with different impact velocities b post-mortem spatial distribution of damage within the laminates c the temporal evolution of composite armor laminate back-face bulging and delamination and d the existence of three distinct 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 back-face delamination and bulging of the armor panel.
- Laminates and Composite Materials