已收录 273081 条政策
 政策提纲
  • 暂无提纲
Hypervelocity impact on strain-rate sensitive shielded plates
[摘要] A ballistic limit equation for hypervelocity impact on thin plates is derived analytically. This equation applies to cases of impulsive impact on a plate that is protected by a multi-shock shield, and is valid in the range of velocity above 6 km/s. Experimental tests were conducted at the NASA Johnson Space Center on square aluminum plates. Comparing the center deflections of these plates with the theoretical deflections of a rigid-plastic plate subjected to a blast load, one determines the dynamic yield strength of the plate material. The analysis is based on a theory for the expansion of the fragmented projectile and on a simple failure criterion. Curves are presented for the critical projectile radius versus the projectile velocity, and for the critical plate thickness versus the velocity. These curves are in good agreement with curves that have been generated empirically.
[发布日期]  [发布机构] Rice University
[效力级别] engineering [学科分类] 
[关键词]  [时效性] 
   浏览次数:4      统一登录查看全文      激活码登录查看全文