Penetration Mechanics of Textile Structures
MASSACHUSETTS INST OF TECH CAMBRIDGE
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This report reviews those aspects of wave propagation and dynamic fracture relevant to the penetration mechanics of textile structures intended for use in personnel ballistic protection, and then describes the development and implementation of numerical analyses for use in instances for which closed- form analyses are intractable. These numerical treatments are used to assess the manner in which fiber material properties influence ballistic resistance, and this is done by performing simulations of missile impact on four fabrics of actual interest ballistic nylon, Kevlar 29, Kevlar 49, and graphite. Following this parametric materials study, the numerical treatment is extended to include the effect of linear and non-linear viscoelastic relaxation on fabric response to impact. Finally, a special purpose computer code is described which was developed to study stress wave effects occurring at fiber crossovers.
- Laminates and Composite Materials