Engineering Propeties of Simulated Lunar Soils

Vey, Eben; Nelson, John D.

doi:10.1061/jsfeaq.0000704

Cited by 3 publications

(1 citation statement)

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“…The measured cohesive force of the Allende fragments and aggregates after heating was approximately three- to fourfold larger for Fnormalmeas¯ than at ambient temperature. This was consistent with the two- to threefold increase in cohesion observed in direct shear tests for sand and silica under heating and evacuating conditions ( 41 – 43 ) and the ≤7-fold increase in the surface energy of silica obtained by the unified measurement method in previous studies ( 15 ). However, the increase was smaller than the previously estimated ≤10-fold increase in surface energy based on the tensile strength measurements of aggregates consisting of silica spheres ( 16 ).…”

Section: Methodssupporting

confidence: 90%

High mobility of asteroid particles revealed by measured cohesive force of meteorite fragments

Nagaashi

Nakamura

2023

Sci. Adv.

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The cohesive force of asteroid particles is a crucial parameter in microgravity. The cohesive force was evaluated under the assumptions of lunar regolith and proportionality to particle size; however, it is sensitive to particle shape. In this study, cohesive-force measurements of meteorite fragments and aggregates consisting of silica microspheres revealed that the cohesive force is independent of the sizes of the fragments and aggregates as well as of the fragment preparation methods. The cohesive forces of the asteroid particles were found to be orders of magnitude smaller than previously predicted, explaining the high mobility of asteroid surface particles identified by space exploration.

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