Status of NASA Research on Projectile Shape Effects-Impact Simulations

Miller, J ; Christiansen, E ; Hyde, J

关键词: PROJECTILES;    SHAPES;    CYLINDRICAL BODIES;    SPACECRAFT SHIELDING;    DIRECT NUMERICAL SIMULATION;    MATHEMATICAL MODELS;    IMPACT VELOCITY;    SPACE DEBRIS;    SPACECRAFT BREAKUP;    IMPACT TESTS;    THERMAL PROTECTION;    HEAT SHIELDING;    NASA SPACE PROGRAMS;   

RP-ID  :  JSC-E-DAA-TN68146

学科分类：航空航天科学

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来源: NASA Technical Reports Server

【 摘 要 】

Numerical evaluation of a Whipple shield has yielded a ballistic model for cylindrical projectiles. A numerical model of a Whipple shield covered with a thermal-blanket that is representative of operational shields has been developed using CTH: The shield model has been evaluated against existing test data; The projectile model has been developed from preexisting models for graphite-epoxy materials. The model has been used to identify projectile characteristics at the ballistic limit for spherical and cylindrical projectiles; Considered normal impacts of the shield at 7 kilometers per second; Varied the angle between the axis-of-symmetry and velocity vector; Varied the length to the diameter ratio over a broad range. The results have been consolidated into a generalized model that can be adapted to existing spherical models