Third Progress Report of Light Armor Program
CALIFORNIA UNIV BERKELEY BERKELEY United States
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Computer calculations in conjunction with experiments are used to develop models that describe the failure of a material at the elastic limit and the subsequent failure by rupture after plastic elongation. A fracture model is developed that described the behavior of ceramic materials. The material descriptions are then used in a computer calculation of the penetration of a ceramic-faced aluminum target by a sharp steel projectile. The calculation correlates very well with a corresponding ballistic experiment that employed cameras and a flash x-ray technique to follow, in time, the various material interfaces. The important target material properties to defeat penetration and the failure modes of the materials are identified. It is noted that there is not just one material property, but a combination of properties required for an efficient armor. An experimental method to evaluate armor candidate materials that replaces ballistic limit tests is also presented.
- Ceramics, Refractories and Glass