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Lunar surface mechanical properties

Christensen, E. M. and Batterson, S. A. and Benson, H. E. and Choate, R. and Hutton, R. E. and Jaffe, L. D. and Jones, R. H. and Ko, H. Y. and Schmidt, F. N. and Scott, R. F. and Spencer, R. L. and Sutton, G. H. (1968) Lunar surface mechanical properties. Journal of Geophysical Research, 73 (22). pp. 7169-7192. ISSN 0148-0227. doi:10.1029/JB073i022p07169.

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The surface material at the Surveyor 5 site is granular and slightly cohesive. Spacecraft footpads plowed trenches in this material as the spacecraft slid during landing. For a compressible soil model, a static bearing capacity of 2.7 newtons/cm^2 gave best agreement with the observations. Static firing of the vernier engines against the surface moved surface particles; a crater 20 cm in diameter and about 1 cm deep was produced, apparently at engine shutdown. The permeability of the soil to gases, to a depth of about 25 cm, is 1 × 10^(−8) cm^2, corresponding to soil particles mostly 2 to 60 μ in diameter.

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Additional Information:Copyright 1969 by the American Geophysical Union. (Received March 28, 1968; revised July 15, 1968.) We thank Frank Sperling, JPL, for his major contributions to the section on spacecraft landing analysis and dynamic simulations; Charles Goldsmith, William Peer, Alex Irving, Albert Plescia, and Lloyd Starkes, JPL, for their work on spacecraft shadow predictions and assembly of photographic mosaics; Robert Breshears, John Stocky, and Charles Dodge, for their vernier engine performance analyses; and Dave Conaway, Margaret Dove, and John Hinchey, Hughes Aircraft Company, for assisting in the landing dynamic simulations.
Issue or Number:22
Record Number:CaltechAUTHORS:20141107-123454362
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Official Citation:Christensen, E. M., et al. (1968), Lunar surface mechanical properties, J. Geophys. Res., 73(22), 7169–7192, doi:10.1029/JB073i022p07169.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51447
Deposited By: George Porter
Deposited On:07 Nov 2014 22:05
Last Modified:10 Nov 2021 19:11

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