Computational Predictions of Rear Surface Velocities for Metal Plates under Ballistic Impact
Abstract
We are interested in temporally and spatially resolving the rear surface velocity of a plate under ballistic impact as a function of materials, impact velocity, and the ratio of plate thickness to impactor diameter. There are a variety of applications for which these details are useful: material model validation, ballistic limit (V50) characterization, and mechanics of layered systems, for example. Rapacki1 used free-surface bulging to quantify the remaining armor value of rolled homogeneous armor (RHA). Most previous work however has been related to developing or advancing analytic penetration models. The Walker-Anderson2 model, which describes long-rod penetrators into semi-infinite targets, is of particular note. However, it is only applicable until the targets rear surface affects the penetration process. Ravid et al.3 extended the model by accounting for target bulging and failure. Separately, Walker4 derived a velocity field for the back surface bulge to augment their original model. Chocron et al.5 also extended the Walker-Anderson model to account for different failure criteria in part to accurately capture the ballistic limit for several targets.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 2015
- Accession Number
- ADA619135
Entities
People
- Joel B Stewart
- Robert Doney
Organizations
- United States Army Research Laboratory