DYNAMIC PROPERTIES OF ROCKS.
Abstract
High strain rate (1,000,000 to 100,000,000/sec) release adiabats and the principal Hugoniots of a water-saturated tuff and of fused quartz (representative of the primary solid constituent of tuff) were measured at stresses below 500 kbar in one-dimensional shock-wave experiments using explosively accelerated flyer plates. Results suggest that both materials undergo shock-induced transformations which are at least partially irreversible on the time scale of the experiments. Between 135 and 470 kbar, fully water-saturated NTS Rainier Mesa tuff (initial density 1.9 to 2.1 g/cucm, moisture content 13% to 17%) was found to support a single, stable, plastic shock. However, anomalously low compressibility along the Hugoniot at stresses between 100 and 400 kbar indicates shock-induced phase transformations in some constituents; these are probably allotropic transformations from four- to sixfold coordinated silicate glasses. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1968
- Accession Number
- AD0838289
Entities
People
- C. F. Petersen
- J. T. Rosenberg
- T. J. Ahrens
Organizations
- SRI International