This is a progress report on work conducted in FY93 to define the dynamic response of S-2 glass reinforced plastic laminate under ballistic loading. The work is divided into three parts, a description of ballistic impact damage in monolithic laminates produced by fragment simulators and measurement of target residual compressive strength, determination of material dynamic properties, and measurement and analysis of stress levels in glass reinforced plastic laminates under ballistic ...
The small caliber AP ballistic performance of two hardened 4300 series alloy steels is studied. Both alloys satisfy specification AMS 6359C for aircraft-quality steel plate, except one has a modified carbon content of 0.46 to 0.48 weight percent; AMS 6359C specifies a carbon content of 0.38 to 0.43. The AMS 6359C alloy is tested in monolithic plate form; the higher carbon alloy is tested as frontal plate in steel/aluminum laminate ...
XP (stretched polypropylene) film is perhaps the most effective material for construction of hardened dielectric walls. It has excellent fragment-defeat properties, a low relative dielectric constant (2.3) and a very low loss tangent (0.005). For low-loss materials, reflection losses are determined by the dielectric constant and absorption losses by the loss tangent. A perfect radome material would have a dielectric constant of one and a loss tangent of zero. Additionally, ...
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