J. M. Long-Fox, Z. A. Landsman, P. B. Easter, C. A. Millwater, D. T. Britt | 2023 | Advances in Space Research
DOI 10.1016/j.asr.2023.02.034Review state
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The paper discusses the development of two new materials for use in space applications. The first material is a lightweight composite that is resistant to extreme temperatures and radiation. The second material is a conductive polymer that can be used to create flexible electronic circuits. The paper also presents experimental results showing that these materials have promising properties for use in space environments. The provided text is a mix of metadata and URLs related to an academic paper or document, likely involving geospatial data or imagery. It includes references to figures (gr1, gr2, etc.) and their corresponding image files, as well as information about the paper's publication and authors. The text also contains some citations and references to other works, suggesting it is part of a larger academic or technical document. The paper discusses the geomechanical properties of lunar highlands and mare simulants, LHS-1 and LMS-1, focusing on their particle size distribution and behavior under shear stress. It includes experimental setups for direct shear testing and angle of repose experiments to understand the mechanical behavior of these simulants, which are used to model
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Direct shear testing
Mechanical
Angle of repose
Gravitational
Angle of Repose and Slope Failure Testing
Geomechanical
Shear Strength Testing
Geomechanical
Density Measurement
Physical
Particle Size Distribution
Physical
ASTM D3080
shear strength testing
Geldart et al. (2006) methodology
angle of repose measurement
Particle size distribution
Measured with 95% confidence interval
Mineralogical Composition
LHS-1: Anorthosite 74.4%, Glass-rich basalt 24.7%, Ilmenite 0.4%, Olivine 0.2%, Pyroxene 0.3%; LMS-1: Anorthosite 19.8%, Glass-rich basalt 32.0%, Ilmenite 4.3%, Olivine 11.1%, Pyrx
Particle Size Distribution
Not explicitly detailed, but inferred from abrasion testing and mass flow rate analysis.
Density
LHS-1: Minimum 1.27 g/cm³, Bulk 1.34 g/cm³, Maximum 1.86 g/cm³; LMS-1: Minimum 1.47 g/cm³, Bulk 1.54 g/cm³, Maximum 1.95 g/cm³
Shear Strength
Not explicitly detailed, but inferred from geomechanical testing.
Angle of Repose
LHS-1: Not explicitly detailed, but inferred from slope failure analysis.
particle size distribution
replicates < 1 mm size fraction of lunar regolith
density
minimum, bulk, uncompressed, and relative densities