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Bearing Capacity of Simulated Lunar Surfaces in Vacuum

Bernett, E. C. and Frink, E. P. and Jaffe, L. D. and Martens, H. E. and Scott, R. F. (1964) Bearing Capacity of Simulated Lunar Surfaces in Vacuum. AIAA Journal, 2 (1). pp. 93-98. ISSN 0001-1452. doi:10.2514/3.2219.

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The static bearing capacity of a granular material consisting of dry, crushed olivine basalt was determined in air and in a 10^(-6)-mm-Hg vacuum by means of cylindrical probes with a range of diameters. Samples with various particle-size distributions (all below 35 mesh) were used for these tests. It was found that the packing density of these granular materials was the factor that had the greatest effect on the bearing capacity. The minimum bearing capacity of a loosely packed sample with a density of 1.25 g/cm^3 was about 0.1 k g/cm^2. The maximum bearing capacity of a densely packed sample with density of 2.1 g/cm^3 was about 7kg/cm^2. The effects of vacuum were insignificant compared with the effect of packing density. Direct shear tests indicated the cohesion in a few densely packed samples to be 1-2 x 10^4 dyne/cm^2. For the small probes used, the cohesion was estimated to contribute 85 lo 95% of the observed bearing capacity for the densely packed samples but much less for the loosely packed samples.

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Additional Information:© 1964 AIAA. Received July 2, 1963; revision received September 30, 1963. The work described herein represents one phase of research carried out at the Jet Propulsion Laboratory, California Institute of Technology, under Contract No. NAS 7-100, sponsored by NASA.
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Official Citation:Bearing capacity of simulated lunar surfaces in vacuum E. C. BERNETT, E. P. FRINK, L. D. JAFFE, H. E. MARTENS, and R. F. SCOTT AIAA Journal 1964 2:1, 93-98
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:62724
Deposited By: Ruth Sustaita
Deposited On:09 Dec 2015 20:12
Last Modified:10 Nov 2021 23:05

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