Results 91 to 100 of about 187 (127)

Evaluations of lunar regolith simulants

Planetary and Space Science, 2016
Apollo lunar regolith samples are not available in quantity for engineering studies with In-Situ Resource Utilization (ISRU). Therefore, with expectation of a return to the Moon, dozens of regolith (soil) simulants have been developed, to some extent a result of inefficient distribution of NASA-sanctioned simulants.
Taylor, Lawrence A., Pieters, Carle M., Britt, Daniel   +2 more
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Particle Shape In Simulants of the Lunar Regolith

Journal of Sedimentary Research, 2012
Abstract: Shape is an important property of lunar regolith particles. It substantially affects the regolith's strength, the angle of repose, the packing density, and the ability of regolith particles to attach to and abrade spacecraft materials or clog air filters. For these reasons, simulants are needed to reproduce regolith particle
Doug Rickman, Christopher Immer, Philip Metzger, Emily Dixon, Matthew Pendleton, Jennifer Edmunson   +5 more
openaire   +1 more source

Developing an Anorthositic Lunar Regolith Simulant

57th International Astronautical Congress, 2006
We must increase our understanding of the regolith, as future human missions to both the Moon and Mars will rely on it for insitu resource utilization (ISRU) to produce fuel, water, and other life support and construction materials. ISRU will be more cost effective than shipping required materials from Earth.
M. M. Battler, J. Richard, D. Boucher, J. G. Spray   +3 more
openaire   +1 more source

Electrical stress and strain in lunar regolith simulants

Planetary and Space Science, 2011
Abstract Experiments to entrain dust with electrostatic and fluid-dynamic forces result in particulate clouds of aggregates rather than individual dust grains. This is explained within the framework of Griffith-flaw theory regarding the comminution/breakage of weak solids.
J. Marshall, D. Richard, S. Davis
openaire   +1 more source

Compressional wave velocities of a lunar regolith sample in a simulated lunar environment

Journal of Geophysical Research: Solid Earth, 1982
Ultrasonic compressional wave velocities have been measured in the laboratory for an Apollo 15 soil sample (15301, 38) under very low uniaxial stress and high vacuum conditions. The velocities measured range from 125 to 522 m/s. The velocities of the soil are stress dependent and are strongly affected by compaction history. Hertzian contact theory does
Douglas M. Johnson, A. L. Frisillo, James Dorman, Gary V. Latham, David Strangway   +4 more
openaire   +1 more source

A Review of Geotechnical Properties of Lunar Regolith Simulants

Earth & Space 2006, 2006
During preparations for the Apollo missions, regolith simulants were used for design, experiments and prototype development (e.g. the Lunar Roving Vehicle). The soils were not high-fidelity simulants, but were of great use during design and testing, leading to successful Apollo missions.
openaire   +1 more source

The Rheology of Lunar Regolith and its Simulants

Granular materials are composed of macroscopic solid particles with a discrete nature. Their complex particle interactions and structure lead to their observed material properties, complicating the prediction their behavior in various applications more difficult.
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Geometrical Characteristics of Lunar and Martian Regolith Simulants

Earth and Space 2022, 2023
Caleb J. Carnes, Reza S. Ashtiani, Joel A. Sloan, Melissa S. Beauregard, Kimberly D. De la Harpe   +4 more
openaire   +1 more source

Thermal Mining of volatiles in lunar regolith simulant

Planetary and Space Science, 2022
C. Purrington, G. Sowers, C. Dreyer
openaire   +1 more source

3D shape analysis of lunar regolith simulants

Powder Technology, 2023
Bo Peng, Rotana Hay, Kemal Celik
openaire   +1 more source