Hypervelocity impact on shielded platesA 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 it 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.
Document ID
19940034684
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Smith, James P. (Rice Univ. Houston, TX, United States)
Date Acquired
August 16, 2013
Publication Date
October 1, 1993
Subject Category
Structural Mechanics
Report/Patent Number
IAF PAPER 93-865
Meeting Information
Meeting: IAF, International Astronautical Congress