Laser Shock Experiments to Investigate Fragmentation at Extreme Strain Rates

Rességuier, T. de; Loison, Didier; Jodar, Benjamin; Lescoute, E.; Roland, C.; Signor, Loëc; Dragon, André

doi:10.1002/9781119579311.ch6

Cited by 1 publication

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“…In the NASA Stardust mission [7] , silica aerogels were used in the primary instrument to capture fine particles from both Comet 81P/Wild 2 and interstellar particle [8][9][10][11][12] . Meanwhile, in the laser shock-loaded collection experiment, silica aerogels have been used as fragment collectors for many years [13,14] . So far, silica aerogel has been proved as an ideal capture medium for space debris, interplanetary dust and shock-loaded fragments (highly transparent, low density, highly porous, etc.…”

Section: Introductionmentioning

confidence: 99%

Morphology analysis of tracks in the aerogels impacted by hypervelocity irregular particles

Liu

et al. 2021

High Pow Laser Sci Eng

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As an attractive collector medium for hypervelocity particles, combined with outstanding physical properties and suitable compositional characteristics, SiO2 aerogel has been deployed on outer space missions and laser shock-loaded collection experiments. In this paper, impact experiments were conducted to understand the penetration process of irregular grains, irregular Al2O3 grains with two different sizes and speeds (~110 μm@7 km/s, ~251 μm@2.3 km/s) at various density silica aerogels. By classifying the shapes of projectile residues and tracks, the morphology of tracks was analyzed. It was observed that there were several kinds of typical tracks in the penetration of irregular grains, accompanied by residues with the shapes of near-sphere, polyhedron, streamlined body wedge, and rotator. The rotational behavior was demonstrated by the final status of one flake projectile as direct evidence. In addition, there was no obvious relationship between the track length and experimental parameters, which may be caused by the uncertain interaction between aerogels and irregular particles. In addition, it confirmed the existence of fragmentation, melting situation by observing the shape of the impact entrance hole. At the same time, optical coherence tomography was used to observe the detail of tracks clearly, which provided a method to characterize the tracks nondestructively.

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Section: Introductionmentioning

confidence: 99%

Morphology analysis of tracks in the aerogels impacted by hypervelocity irregular particles

Liu

et al. 2021

High Pow Laser Sci Eng

View full text Add to dashboard Cite

show abstract

Laser Shock Experiments to Investigate Fragmentation at Extreme Strain Rates

Cited by 1 publication

References 41 publications

Morphology analysis of tracks in the aerogels impacted by hypervelocity irregular particles

Morphology analysis of tracks in the aerogels impacted by hypervelocity irregular particles

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