Accession Number:

ADA535557

Title:

The Effect of Particle Reinforcement on the Dynamic Deformation of Epoxy-Matrix Composites

Descriptive Note:

Interim rept. Oct 2008-Jun 2009

Corporate Author:

AIR FORCE RESEARCH LAB EGLIN AFB FL MUNITIONS DIRECTORATE

Report Date:

2010-10-01

Pagination or Media Count:

11.0

Abstract:

Multiphase composite materials consisting of one or more types of particle reinforcement in an epoxy matrix are being studied to determine the effect of reinforcement on the dynamic yield strength and critical impact velocity for plastic deformation. Casting was used to prepare epoxy matrix composites with varying particle loading fractions 20-50 Vol, size 5 and 50im, and type Al or NiAl. The cast samples were tested at strain rates in the range of 10 to 10 s, using a 7.62 mm gas gun with a rod-on-anvil Taylor impact experiment setup. The recovered impacted specimens were analyzed to determine the dimensions of their deformed and undeformed regions. The yield strength and critical velocity for plastic deformation were evaluated using Hutchings analysis and correlated with quantitative characteristics of the size and distribution of the reinforcement phases.

Subject Categories:

  • Laminates and Composite Materials
  • Metallurgy and Metallography
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE