Improved Individual Ballistic Protective Fibers/Material Systems for Body Armor

The proposed effort incorporates an anlalytical approach to support development and optimization of an improved individual ballistic protective material system for body armor which incorporates poly vinyl alcohol (PVA) fibers. The approach relies on a hierarchy of analytical models describing the mechanical and ballistic performance of fibers, yarns, and fabrics. The models are then exercised to determine parametric sensitivities in terms of fiber, yarn, and fabric properties. Insights garnered from this activity are then used to guide subsequent PVA fiber development. The five tasks proposed include: (1) Analytical Model Development; (2) Parameter Studies; (3) Experimental determination of fiber and yarn deformation modes; (4) Development of a Phase II Plan; and, (5) Preparation of deliverables. The analytical model development is also divided into four subtasks which descrive: (a) Fiber mechanical properties in the longitudinal and lateral direction; (b) Multitow mechanical properties; (c) Favorable yarn geometries; and, (d) Deformation and failure modes of the fiber, yarn, and fabric.