Deformation, Fracture and Explosive Properties of Reactive Materials
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 PBX's, 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 HMX's of different particle sizes, TATB, PBX's 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 08, 1989
- Accession Number
- ADA222870
Entities
People
- John Edwin Field
Organizations
- University of Cambridge