Accession Number:

ADA370775

Title:

The Effect of Styrofoam Interlayers in Fragment Witness Packs

Descriptive Note:

Technical memorandum

Corporate Author:

DEFENCE RESEARCH ESTABLISHMENT VALCARTIER (QUEBEC)

Personal Author(s):

• McIntosh, G.

Report Date:

1999-09-01

Pagination or Media Count:

18.0

Abstract:

Witness packs are used to obtain the mass velocity distribution of fragments generated, for example, at complete perforation of a target. A witness pack consists of several metallic layers of various materials and thicknesses spaced evenly. The STANAG 4190 description requires a low density Styrofoam spacer between the layers. Previous computer simulations of witness packs have been reported but were simplified by using air gaps. This document describes new computer simulations with a low density Styrofoam layer between each layer. It was difficult to describe the Styrofoam mechanical properties exactly but an approximate representation was used. The study presented in this memorandum shows that the Styrofoam does have a significant effect on the results of the mass velocity distribution and therefore, one should be very careful when comparing simulations done with and without the Styrofoam to experimental results.

Descriptors:

• *DAMAGE ASSESSMENT
• *TERMINAL BALLISTICS
• *LETHALITY
• COMPUTERIZED SIMULATION
• FINITE ELEMENT ANALYSIS
• POLYSTYRENE
• CANADA
• HYDRODYNAMIC CODES
• FRAGMENTATION AMMUNITION

Subject Categories:

• Ballistics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE