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The moon

, Volume 8, Issue 1–2, pp 58–72 | Cite as

Shear strength of lunar soil from oceanus procellarum

  • Leonard D. Jaffe
Article

Abstract

Soil from the scoop of Surveyor 3, returned to Earth by Apollo 12 astronauts, has been tested in a miniature shear box at five bulk densities, from 0.99 to 1.87 g cm−3. Cohesion increased with bulk density from 3 × 10−2 to 3 × 10−1 N cm−2; internal friction angle increased from 13° to 56°. Shear stress vs normal stress data fit a logarithmic relationship better than a linear one, at normal stresses of 3 × 10−3 to 3 x 100 N cm−2. Results of these tests, in air, show no systematic differences from those for tests made elsewhere in vacuum and nitrogen. Results agree with those obtained in remotely controlled lunar surface operations with Surveyor 3 and other spacecraft provided that the bulk density was slightly underestimated for the on-surface measurements.

Keywords

Nitrogen Shear Stress Shear Strength Bulk Density Normal Stress 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© D. Reidel Publishing Company 1973

Authors and Affiliations

  • Leonard D. Jaffe
    • 1
  1. 1.Jet Propulsion Laboratory/California Institute of TechnologyPasadenaUSA

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