Konu
A lack of accurate modeling and prediction capability has been particularly problematic for NIST in carrying out its work in support of maintaining safety of law-enforcement personnel through, (a) forensics connected to suspected armor failures in the field, and (b) shoring up certification test-standards relied on by federal agencies to ensure body armor safety. The goal of the project is to extend a numerical simulation model, developed at Cornell University, to apply to a wide variety of armor construction and bullet scenarios.
The core of the proposal centers on extending the model to treat such critical aspects as:
1. Different yarn crimp and spacing in the warp and fill direction – even different yarns,
2. Multiple interacting layers,
3. Performance degradation from a rapid sequence of closely spaced bullet impacts,
4. Effects of projectile nose shape, deformation and friction during the impact event,
5. Effects of clay backings on V0, V50 and back-face deflection (BFD) used in testing,
6. Performance prediction of non-woven systems and woven/non-woven hybrids