Table of Contents
ISRN Mechanical Engineering
Volume 2011, Article ID 872693, 4 pages
http://dx.doi.org/10.5402/2011/872693
Research Article

High-Speed Study of Drop-Weight Impact Ignition of PBX 9501 Using Infrared Thermography

1Mechanical Engineering, West Texas A&M University, Canyon, TX 79016, USA
2Applied Technology Division, B&W Pantex Plant, Amarillo, TX 79119, USA

Received 11 January 2011; Accepted 10 February 2011

Academic Editor: A. Tounsi

Copyright © 2011 Emily M. Hunt et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Reaction in explosive materials does not occur as a result of homogenous heating of the sample, but rather from a localized region of high temperature called a hot spot. Observation of hot spot development is critical in understanding the heat transfer mechanisms occurring during reaction. Due to the strong temperature dependence of explosives, the overall reaction rate is dominated physically by these hot spots. Once formed, these hot spots either fail to react chemically due to thermal diffusion or react exothermically thus creating an ignition site in the solid explosive. The slightest difference of physical properties can change the positioning of hot spot development, creating an argument that the differences in material properties influence the formation of hot spots, which produce an exothermic reaction.