Abstract
As a step toward a better understanding of engine burst containment and ascertaining practical shield requirements, a large deflection shell computer program has been modified to model fragment impact, simultaneously calculate the motion of the fragment and shield and predict perforation. Recent test data indicates that substantial savings in engine burst containment shield weight may be possible by the use of ballistic fabrics. In metal shields the dissipation of fragment kinetic energy is due to compressive and shear deformation in the impact region followed by extensive bending and stretching deformation due to structural excitation. In contrast, a fabric shield dissipates the energy almost wholly by tensile deformation. The mechanical energy is distributed relatively rapidly throughout the shield as a result of the fabric's high wave speed and membrane response. Encouraging results were found in analytical comparisons with experimental data.
Published Version
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