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Globally smooth expressions for shock pressure decay in impacts

Ruedas, T. (2015) Globally smooth expressions for shock pressure decay in impacts. 47th Lunar and Planetary Science Conference, 21-25 Mar 2016, The Woodlands, TX, USA.

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Official URL: http://www.hou.usra.edu/meetings/lpsc2016/pdf/1442.pdf


Hypervelocity meteorite impacts on planets subject the target to very high shock pressures. The isobars in the affected region are approximately spherical and centered on a point at a certain depth below the point of impact. The decay of the shock pressure with increasing distance from that center is usually represented in the form lg p=a+n lg(r/R), where p is the shock pressure, r is the distance from the center of the sphere, R is the radius of the impactor, and a and n are fitting constants; a similar relation is also used for the particle velocity. Although its simplicity seems to speak in its favor, this form has some problems: it is not bounded from above, thus necessitating an imposed maximum value that depends on additional assumptions; the slope of the decay is not accurately described by a single n for all r; the transition between domains with different decay parameters introduces kinks into p(r) at poorly defined points. It is therefore proposed to replace the decay law with other functional forms that are bounded and smooth and can be fully derived from data from numerical experiments. The proposed functions are applied to data of dunite-on-dunite impacts from the literature.

Item URL in elib:https://elib.dlr.de/104296/
Document Type:Conference or Workshop Item (Other)
Title:Globally smooth expressions for shock pressure decay in impacts
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ruedas, T.thomas.ruedas (at) dlr.dehttps://orcid.org/0000-0002-7739-1412
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Event Title:47th Lunar and Planetary Science Conference
Event Location:The Woodlands, TX, USA
Event Type:international Conference
Event Dates:21-25 Mar 2016
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Physics
Deposited By: Ruedas Gomez, Thomas
Deposited On:12 Jul 2016 10:21
Last Modified:31 Jul 2019 20:01

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