ATTENUATION OF SHOCK WAVES IN DISTENDED MATERIALS
Abstract
Porous graphite and specially prepared aluminum foams (40 to 80% of crystal density) were investigated in an attempt to deduce the effect of such material parameters as particle (or pore) shape, size, and size distribution on response of the materials to shock loading. Results suggest that the strength of the solid matrix and the porosity are more important than particle geometry per se. Hugoniots for one aluminum and one graphite foam (both about three-fourths of crystal density) were measured in detail up to about 25 kbar. In the pressure and porosity range studied, the P-V Hugoniots of the foams after compaction have been found to be very close to those of the solid materials. Recovered shocked specimens of aluminum foam exhibited densities characteristic of solid aluminum, whereas recovered shocked specimens of ATJ graphite had densities very close to their initial densities. An artificial viscosity digital computer code was adapted to foams and shown to be capable of predicting approximate shock attenuation behavior of porous solids as measured experimentally.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1966
- Accession Number
- AD0482662
Entities
People
- David N. Schmidt
- Ronald K. Linde
Organizations
- SRI International