A Study of Shaped-Charge Collapse and Jet Formation Using the HEMP (hydrodynamic, Elastic, Magneto, and Plastic) Code and a Comparison with Experimental Observations

Abstract

The HEMP code was used to model shaped-charge collapse and jet formation processes for several charge configurations. Jet characteristics were determined by coupling the HEMP code output to the jet formation theory of Birkhoff, MacDougall, Pugh, and Taylor. A new feature of this study with HEMP is an explicit rule for determining when a liner segment collapses into the jet flow. Radiographs of shaped charges tested at BRL were compared to HEMP simulations of the collapse process and the jet velocity/mass distributions calculated for each modelled configuration. An experimental data base of velocity/mass distributions was obtained and compared with the calculated distributions. A one-to-one mapping was done showing each liner segment's position in the initial HEMP grid versus its relative position in the jet.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1984
Accession Number
ADA149472

Entities

People

  • Brian M. Simmons

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Cyber
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Computer Programs
  • Coordinate Systems
  • Equations
  • Experimental Data
  • Explosives
  • Jet Flow
  • Materials
  • Measurement
  • Microsecond Time
  • Military Research
  • Plastic Explosives
  • Radial Velocity
  • Shaped Charge Jets
  • Shaped Charges
  • Simulations
  • Stagnation Point
  • X Rays

Fields of Study

  • Physics

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Computational Fluid Dynamics (CFD)
  • Optical Fiber Sensing and Electromagnetic Propagation.