Further One-Dimensional Analysis of Long-Rod Penetration of Semi-Infinite Targets

摘要

A new one-dimensional analysis of long-rod penetration of semi-infinite targetsis presented. Models in this field attempt to accurately describe the penetration process of a long rod of material into a semi-infinite construct of target material. This one-dimensional analysis predicts profile hole diameters and penetration depths over a wide range of material combinations and extends the previous analysis in this area to include hypervelocity impact velocities. This approach utilizes values of material dynamic yield strengths, known impact conditions, and the well established crater volume/kinetic energy relationship to predict crater hole characteristics over an impact velocity range of 1 to 6 km/s. The analysis presented here includes an initial transient phase and modifies previous estimates for pressure on the penetrator tip at steady-state. The average pressure at steady state was found to be a constant value over the range of impact velocities for a particular shot combination.