SHOCK EFFECTS ON FROZEN MATERIALS EXPLODING WIRE EXPERIMENTS.

• Main Author: Smith,James L.
• Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
• Format: Text
• Language: English
• Published: 1970
• Subjects: Soil Mechanics; Snow; Ice and Permafrost; (*SOILS; PERMAFROST); (*EXPLODING WIRES; SHOCK WAVES); (*SHOCK WAVES; EQUATIONS OF STATE); SILT; PRESSURE; VELOCITY; PHASE MEASUREMENT; LOADS(FORCES); ALASKA; HUGONIOT; FAIRBANKS(ALASKA); Fairbanks; Ice; permafrost; Alaska
• Online Access: http://www.dtic.mil/docs/citations/AD0707924; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0707924

Hugoniot curves were generated from simultaneous measurements of shock and free-surface velocities, obtained from samples of frozen Fairbanks (Fox) silt, using the exploding wire technique. The abrupt change in slope of the (U sub s) - (U sub p) Hugoniot is indicative of a phase change. The shape of the P-V Hugoniot suggests that the transformation begins immediately but does not go to completion. This means that, although the pressure lies slightly above the Rayleigh line through the mixed phase region, the slope does not increase as rapidly as it would if the material had stayed in the initial phase. (Author)