Accession Number : ADA260436


Title :   Studies in Penetration Mechanics


Descriptive Note : Final rept.


Corporate Author : MISSOURI UNIV-ROLLA


Personal Author(s) : Barta, Romesh C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a260436.pdf


Report Date : Oct 1992


Pagination or Media Count : 161


Abstract : Steady state axisymmetric deformations of a thick thermoviscoplastic target being penetrated by a cylindrical penetrator also made of a thermoviscoplastic material have been studied. The materials of the target and the penetrator have been assumed to exhibit strain-rate hardening and thermal softening. In the second set of studies, the penetrator has been taken to be rigid, and the effect of friction at the target/penetrator interface, elasticity of the target material, and different flow rules used to model the target material have been analyzed. An engineering model capable of analyzing deformations of a viscoplastic target being penetrated by a rigid cylindrical rod has been developed. Various predictions from the model are found to match well with those from the finite element solution of the problem.... Steady state penetration, Axisymmetric deformations, Material elasticity, Frictional force.


Descriptors :   *KINETIC ENERGY PROJECTILES , *PENETRATION , *TARGET ACQUISITION , *THERMAL TARGETS , *VISCOPLASTICITY , ARMY RESEARCH , AXISYMMETRIC , DEFORMATION , ENGINEERING , FLOW , FRICTION , HARDENING , INTERFACES , MATERIALS , MODELS , PREDICTIONS , RODS , SOFTENING , STEADY STATE


Subject Categories : Infrared Detection and Detectors
      Ammunition and Explosives
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE