Accession Number:

ADA222870

Title:

Deformation, Fracture and Explosive Properties of Reactive Materials

Descriptive Note:

Final technical rept. Nov 1988-Dec 1989

Corporate Author:

CAMBRIDGE UNIV (UNITED KINGDOM) CAVENDISH LAB

Personal Author(s):

Report Date:

1989-12-08

Pagination or Media Count:

95.0

Abstract:

A range of techniques have been developed for studies of the behaviour of explosives when impacted and for recording their strength, failure and ignition properties these are described in Section 2. They include a drop- weight facility with transparent anvils, an instrumented drop-weight machine, a miniaturized Hopkinson bar system for high rate of strain property measurement, laser speckle for studies of deformation and fracture of PBXs, an automated system for analyzing speckle and moire records, and a heat sensitive film technique for recording the position and temperatures of hot spots. The report gives data on the behaviour of a range of HMXs of different particle sizes, TATB, PBXs based on TATB Section 2 and various propellants when impacted in the drop-weight test. In the experiments with propellants Section 4 they were studied both at room temperature and below their glass transition temperature. At the lower temperature their flow stresses were higher and in the main they were more sensitive. Photographic evidence is presented Section 2 of adiabatic shear band formation measurements of band spacing and band width are compared with theoretical predictions.

Subject Categories:

  • Ammunition and Explosives

Distribution Statement:

APPROVED FOR PUBLIC RELEASE