Physics – Geophysics
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pggp.rept..344s&link_type=abstract
In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990 p 344-346 (SEE N92-10728 01-91)
Physics
Geophysics
Cratering, Cylindrical Chambers, Meteorite Craters, Simulation, Test Chambers, Basalt, Centrifuges, Overpressure, Rocks
Scientific paper
A new technique using external pressure was developed to simulate the lithostatic pressure due to self-gravity of small bodies. A 13-in. diameter cylindrical test chamber with L/D of 1 was fabricated to accommodate firing explosive charges with gas overpressures of up to 6000 psi. The chamber was hydrotested to 9000 psi. The method allows much larger scale factors that can be obtained with existing centrifuges and has the correct spherical geometry of self gravity. A simulant for jointed rock to be used in this fixture was developed using weakly cemented basalt. Various strength/pressure scaling theories can now be examined and tested.
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