Experimental and computational investigations were performed in order to better understand the mechanical response of rigid targets with various geometries to the detonation of shallow buried explosives. The motion of the targets was measured by use of high-speed digital video photography. This work involved flat targets, targets that were downwardly convex, and targets that were downwardly concave with explosive charges located at various positions beneath the targets. It was observed that, in general, angled hulls - whether downwardly concave or convex - tended to reduce the amount of momentum imparted to the center of mass of the targets. Computations were performed by use of an arbitrary Langrangian-Eulerian treatment in a nonlinear finite element code. A model based on quasi-static test evaluations of wet concrete sand was used for prediction of the soil behavior. The computational technique provided very good agreement between computation and experiment.
Bibliographical noteFunding Information:
The authors wish to thank Leslie Taylor from the University of Maryland, Chian-Fong Yen, Scott Kukuck, and Douglas Kooker from the US Army Research Laboratory as well as Erin Williams, Kent Danielson, Jon Windham, and Steve Akers from the US Engineer Research and Development Center for various insights with regard to the interaction of soils and shallow buried explosives. The authors are also grateful to the US Army Tank-Automotive Research, Development and Engineering Center and the Center for Energetic Concepts at the University of Maryland for the support they provided for this work.
All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
- Automotive Engineering
- Aerospace Engineering
- Safety, Risk, Reliability and Quality
- Ocean Engineering
- Mechanics of Materials
- Mechanical Engineering