The Sensitivity of Impact Response to the Mechanical Behavior of the Penetrator.

摘要

A simple theory of impact which makes it easy to focus attention on the various physical phenomena which occur, and is simple enough so that the performance of parametric studies is economical is under development. The theory has progressed in steps, starting from the simplest model possible and gradually adding more complexities. This report presents the results of one step in the development: a study of the sensitivity of impact characteristics to the properties of the impacting particle. Four ideal models of behavior are treated: hydrodynamic, Newtonian fluid, rigid-plastic solid, and rigid. The effects on the impact process are presented in terms of the partitioning of the energy between particle and target, the deformation of the impacting particle, depth into the target the particle penetrates, and the target mass lost as a result of the cavity formation. The predicted trends with increasing impact velocity show some interesting and unforeseen results; for example, penetration depth does not increase always with increase of particle strength.