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High-velocity impacts in regolith: insight from numerical models and experiments

Miljkovic, Katarina; Collins, Gareth; Patel, Manish; Chapman, David and Proud, William (2011). High-velocity impacts in regolith: insight from numerical models and experiments. In: 17th Biennial International Conference of the APS Topical Group on Shock Compression of Condensed Matter, 26 June - 1 July 2011 , Chicago, IL, USA .

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High-velocity impacts are common events on planetary surfaces, from a constant micrometeoroid bombardment to infrequent but catastrophic large asteroid impacts that form giant craters. The consequences of such impacts depend, in part, on the properties of the planet surface, such as strength, porosity and surface gravity. The near-surface of many solar system bodies is a loose granular material composed of dust, soil and broken rock, known as regolith. Planetary regolith could have a range of material properties, hence it is difficult to specify its material model. As a result, experimental investigations of impacts on planetary surfaces often use sand as a regolith analogue material and hydrocode simulations of impact often assume a sand-like equation of state and strength model. In this study, we compare iSALE hydrocode simulations of impacts in sand and other porous granular materials with results from laboratory impact experiments to test and refine material models for regolith materials.

Item Type: Conference or Workshop Item
Copyright Holders: 2011 American Physical Society
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
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Item ID: 32065
Depositing User: Patricia Taylor
Date Deposited: 02 Feb 2012 11:20
Last Modified: 09 Nov 2016 16:20
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