Prediction of micrometeoroid damage to lunar construction materials using numerical modeling of hypervelocity impact events

Allende, Maria I.; Miller, Jason; Davis, Bruce A.; Christiansen, Eric L.; Lepech, Michael D.; Loftus, D. J.

doi:10.1016/j.ijimpeng.2020.103499

Cited by 24 publications

(3 citation statements)

References 26 publications

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“…Meteoroid population around the Moon follows a power law size distribution with small impactors dominating the representation. Traveling at speeds of 3-70 km/s [29], most micrometeoroids are 30-150 μm in size [30]. It has been found that micrometeoroids generally leave impacts of the same order of magnitude as their own sizes [31].…”

Section: Problem Statement: the Battlefield 21 Engineering Problems: The Main Aspects To Considermentioning

confidence: 99%

Regolith and Radiation: The Cosmic Battle

Akisheva¹,

Gourinat²,

Foray³

et al. 2022

Lunar Science - Habitat and Humans

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This chapter discusses regolith utilization in habitat construction mainly from the point of view of radiation protection of humans on missions of long duration. It also considers other key properties such as structural robustness, thermal insulation, and micrometeoroid protection that all have to be considered in parallel when proposing regolith-based solutions. The biological hazards of radiation exposure on the Moon are presented and put in the context of lunar exploration-type missions and current astronaut career dose limits. These factors guide the research in radiation protection done with lunar regolith simulants, which are used in research and development activities on Earth due to the reduced accessibility of returned lunar samples. The ways in which regolith can be used in construction influence its protective properties. Areal density, which plays a key role in the radiation shielding capacity of a given material, can be optimized through different regolith processing techniques. At the same time, density will also affect other important properties of the construction, e.g. thermal insulation. A comprehensive picture of regolith utilization in habitat walls is drawn for the reader to understand the main aspects that are considered in habitat design and construction while maintaining the main focus on radiation protection.

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Section: Problem Statement: the Battlefield 21 Engineering Problems: The Main Aspects To Considermentioning

confidence: 99%

Regolith and Radiation: The Cosmic Battle

Akisheva¹,

Gourinat²,

Foray³

et al. 2022

Lunar Science - Habitat and Humans

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show abstract

“…The lunar environment possesses extreme features, such as a vacuum atmosphere, microgravity, extreme high and low temperatures, and intense radiation (Vaniman et al, 1991). The gravitational acceleration of the lunar surface is approximately onesixth that of Earth, or 1.62 m•s − 2 (Vaniman et al, 1991); the radiation on the lunar surface consists of cosmic radiation, lunar radiation, and secondary radiation, with the average dose of Galactic Cosmic Radiation (GCR) on the surface of the Moon being equivalent to 1369 μSv/ day (Zhang et al, 2020); the temperature difference between day and night on the lunar surface varies, ranging between 95 K-387 K at the equator, with a maximum rate of variation of 150 K per hour (Williams et al, 2017); the average speed of micrometeorites is 20 km/s (Allende et al, 2020); and the maximum magnitude of moonquakes is 5 (Goins et al, 1981).…”

Section: Analysis Of Lunar Surface Characteristicsmentioning

confidence: 99%

Robotic 3D printed lunar bionic architecture based on lunar regolith selective laser sintering technology

Yuan

Zhou

et al. 2022

ARIN

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The lunar base is not only an experimental station for extraterrestrial space exploration but also a dwelling for humans performing this exploration. Building a lunar base presents numerous obstacles and requires environmental perception, feedback design, and construction methods. An integrated fabrication process that incorporates design, 3D printing workflow, and construction details to build a bionic, reconfigurable and high-performance lunar base prototype is presented in this paper. The research comprises the study of the lunar regolith 3D printing mechanism, the real-time control of powder laying and compaction procedure, and the development of a 3D printing tool end system. In this paper, many scientific questions regarding in situ fabrication on the lunar surface are raised and addressed with the proposal of a progressive optimization design method, the molding principle, and gradation strategy of lunar soil-polyaryletherketone (PAEK) hybrid powder, and the principle of dual-light field 3D laser printing. The feasibility of the technical strategy proposed in this paper is verified by the presented empirical samples.

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“…The evolution of plasma and radiofrequency due to hypervelocity impacts of meteoroids and dust was studied along with the exploration of parameters in the creation of dust and its dynamics [13]. Experimental studies were conducted to study the hypervelocity impact on biopolymer-bound soil composites (BSC) at the National Aeronautics and Space Administration's (NASA) White Sands Testing Facility to verify the numerical simulations of shock physics code developed by Sandia National Laboratories [14].…”

Section: Introductionmentioning

confidence: 99%

Atomistic assessment of structural evolution for magnesium during hypervelocity nanoprojectile penetration

2022

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In the present study, the effect of ballistic penetration of a spherical projectile on a monocrystalline magnesium specimen is performed using Embedded Atom Method (EAM) potential in Molecular Dynamics (MD) simulation. The dynamic investigation of structural evolution based on common neighbor analyses and Wigner-Seitz defect analysis are carried out for the varying depth of penetration and velocities of the projectile ( v = 2 km/s, 6 km/s, and 10 km/s). It is found that the extent of amorphization in the specimen is more in the case of higher depth and lower projectile velocity. Voronoi cluster analyses are also done to identify cluster distribution and their transformation during ballistic penetration, which is accompanied by atomic strain and displacement vector evaluation to give light to the effect of shear strain and displacement of atoms respectively. According to Voronoi cluster analysis, Voronoi Polyhedra having <0,4,4,6> and <0,6,0,8> exhibits a higher population during hypervelocity projectile penetration. The findings have potential applications in hypervelocity applications such as defense and space technologies.

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Prediction of micrometeoroid damage to lunar construction materials using numerical modeling of hypervelocity impact events

Cited by 24 publications

References 26 publications

Regolith and Radiation: The Cosmic Battle

Regolith and Radiation: The Cosmic Battle

Robotic 3D printed lunar bionic architecture based on lunar regolith selective laser sintering technology

Atomistic assessment of structural evolution for magnesium during hypervelocity nanoprojectile penetration

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