Deformation, Fracture and Explosive Properties of Reactive Materials.
Abstract
A range of techniques has been developed over the years for studies of the behavior of explosives when impacted and for recording their strength, failure and ignition properties. 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 positions and temperatures of 'hot spots'. With HMX, studies were made with samples of five different particle sizes. The coarser material gave a more violent response (i.e. had a greater explosiveness). Two important factors which influence this are: (i) the compacted structure of the impacted samples which, with the coarser material, leaves more channels (porosity) for deflagration; and (ii) the greater thermal conductivity (by a factor of 2x) of compacted coarse grain material. A paper is in preparation.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 31, 1987
- Accession Number
- ADA193080
Entities
People
- John Edwin Field
Organizations
- University of Cambridge