Accession Number:

ADA210587

Title:

Alternative Test Methodology for Ballistic Performance Ranking of Armor Ceramics

Descriptive Note:

Final rept.

Corporate Author:

ARMY LAB COMMAND WATERTOWN MA MATERIAL TECHNOLOGY LAB

Report Date:

1989-05-01

Pagination or Media Count:

21.0

Abstract:

A laboratory test method of ranking the ballistic performance of ceramic materials is under development at the U.S. Army Materials Technology Lab. by the Ballistic Impact Behavior Group and Armor Systems Team. Ranking are based on residual penetration of a tungsten long rod fired at constant velocity through a laterally confined ceramic into a semi-infinite steel backup. By varying the thickness or areal density of ceramic from zero to a value producing no residual penetration, a ballistic performance map for the ceramic is generated. Different materials can be compared on the basis of residual penetration observed for a given areal density. Ceramics tested to date include aluminum oxide in 90 and high purity forms, titanium diboride, silicon carbide, and boron carbide. Performance rankings observed for these materials are in agreement with the rankings yielded by conventional V50 protection ballistic limit test methods. This test method requires fewer shots than V50 tests, has sensitivity comparable to present test methods, and avoids the fundamental problem of V50 dependence on armor design. As a consequence, it should prove to be valuable for acceptance testing of production materials, comparison testing to rank the performance of new materials, and for parametric analysis of ballistic performance variations resulting from material properties, cell size, confinement, and similar factors.

Subject Categories:

  • Ceramics, Refractories and Glass
  • Test Facilities, Equipment and Methods
  • Armor

Distribution Statement:

APPROVED FOR PUBLIC RELEASE