SwRI: Analytical Penetration Modeling. SwRI has established fast-running, accurate estimate of penetration performance, metallic, ceramic, fabric armors.

  image of omparison of Walker-Anderson model to experimental result for bulging and perforation
 

Comparison of Walker-Anderson model (black lines) to experimental result for bulging and perforation

The Walker-Anderson analytical penetration model, developed by Southwest Research Institute (SwRI), is based on momentum conservation along the projectile-target centerline. Originally developed for semi-infinite metallic armors, the model can be used to solve a wide range of problems including bulging and perforation, incorporating seven different exit failure modes. The analytical penetration model provides a fast-running, accurate capability to estimate penetration performance in metallic, ceramic, and fabric armors.


Analytical Penetration Modeling Applications

  • Long-rod projectiles

  • Small arms (armor-piercing and ball rounds)

  • Fragment-simulating projectiles (FSP)

  • Brittle materials (e.g., glass and ceramics)

  • Ballistic fabrics

  • Ballistic composites

  • Estimates for ballistic protection such as V50, mass efficiency, and limit thickness

  • Hypervelocity impact

graph of ballistic limit vs. thickness predictions for FSPs, and comparison to experimental data   graph of comparison of fabric response model to experimental data

Ballistic limit vs. thickness predictions for FSPs, and comparison to experimental data (solid lines are the model; experimental data are denoted by the symbols)

  

Comparison of fabric response model (solid lines) to experimental data (symbols)

 

graph of comparison of Walker-Anderson model to experimental data for tungsten alloy and steel long rods into armor steel targets   graph of comparison of Walker-Anderson model (solid lines) to nose and tail positions of a long rod penetrating an armor steel target

Comparison of Walker-Anderson model (solid lines) to experimental data for tungsten alloy and steel L/D 10 long rods into armor steel targets

  

Comparison of Walker-Anderson model (solid lines) to nose and tail positions of a long rod penetrating an armor steel target

 

graph of comparison of V(sub)S?V(sub)R and V(sub)50 by Walker-Anderson model to experimental data   graph of the analytical model reproduces the experimental data for tungsten long-rod penetration into a semi-infinite silicon carbide target

Comparison of VS?VR and V50 by Walker-Anderson model to experimental data

  

The analytical model reproduces the experimental data for tungsten long-rod penetration into a semi-infinite silicon carbide target

 

For more information about analytical penetration modeling capabilities at SwRI or how you can contract with SwRI, please contact James D. Walker, Ph.D., at jwalker@swri.org or (210) 522-2051.

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Southwest Research Institute® (SwRI®) is an independent, nonprofit, applied engineering and physical sciences research and development organization with 12 technical divisions using multidisciplinary approaches to problem solving. The Institute occupies more than 1,200 acres and provides nearly two million square feet of laboratories, test facilities, workshops, and offices for more than 3,300 employees who perform contract work for industry and government clients.