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Using and Improving Impact Models

Wednesday, March 15, 2023, 8:20 AM
Montgomery Ballroom

Veronica Bray
Maria Gritsevich
Greg Gosselin
8:20 AM
Session Introduction
8:25 AM
Jia W. Y.* Luo X. Z. Ding M. Zhu M. H.
Effects of Megaregolith Porosity Structure on the Gravity Signature of Lunar Craters: Insights from Numerical Simulations [#1920]
Porous lunar megaregolith. Different pre-impact porosities and thickness of the top porous layer. Different gravity anomalies of impact craters.
8:35 AM
Hundal C. B.* Evans A. J. Mustard J. F.
Factor Analysis Applied to Gravity Profiles of Lunar Impact Craters [#2197]
Impact craters greatly influence crustal porosity. We improve crater signal isolation in GRAIL data by reducing to zonal harmonics and applying factor analysis.
8:45 AM
Luo X.-Z.* Zhu M.-H. Ding M. Manske L. Luther R. et al.
Numerical Simulations of Shock Melting in Oblique Impacts [#1427]
We performed a systematic suite of numerical simulations to quantify melt production for oblique impacts on the Moon.
8:55 AM
Collins G. S.* Miljković K. Wójcicka N. Rajšić A. Lognonné P. et al.
Modeling the 150-m Diameter "Christmas Eve" Impact Crater on Mars [#2297]
Meteoroids falling, all around us / Scientists singing, having fun / It’s the reason for deeper understanding / Merry Christmas Eve crater everyone.
9:05 AM
Panel Q&A
9:25 AM
Harwell M. L.* Stewart S. T. Citron R. I. Caldwell W. K. Plesko C. S.
Gaining Insights into Impact Events Through Rheology Regime Tracking [#2838]
Tracking rheology / Gives insights into impacts / Nice animations.
9:35 AM
Gao Y.* Zhu M.-H. Luther R. Wünnemann K.
Numerical Simulation of Impact-Induced Seismic Wave Generation and Propagation Using a Coupled Approach [#1990]
We use iSALE and classical seismic wave simulation coupled approach to implement numerical simulation of impact-induced seismic wave generation and propagation.
9:45 AM
Lee S.* Johnson B. C.
Spatial Variation of Dwell Time Induced by a Hypervelocity Impact [#2320]
We tested the spatial dwell time variation in a target to get a better understanding of impact process and check the validity of old estimation for dwell time.
9:55 AM
Rajsic A.* Johnson B. C. Hay H. C. F. C. Collins G. S.
Reproducing Crater Morphologies Using the Melosh Model of Acoustic Fluidisation [#1813]
We investigate the acoustic fluidization process during crater collapse using iSALE-2D shock physics code to simulate simple to complex crater transition.
10:05 AM
Panel Q&A
10:25 AM
Rae A. S. P.* Kenkmann T. Collins G. S. Poelchau M. H. Padmanabha V. et al.
Rate-Dependent Strength and the Scaling of Impact Craters [#1571]
Strain rate controls strength / Strength controls crater scaling / My FORTRAN’s working!
10:35 AM
Du J.* Minton D. A. Blevins A. M.
Modeling the Realistic Rim Outlines of Fresh Lunar Craters Based on Their Power Spectral Densities [#1290]
We create a crater rim that mimics a real lunar crater based on its power spectral density, from which the simple-to-complex transition can be found at D = 20 km.
10:45 AM
Yamamoto Y.* Arakawa M. Yasui M. Hasegawa S. Yokota Y.
Impact Experiments for Crater Size Scaling Laws on Rubble-Pile Asteroids [#2081]
We conducted impact experiments on granular targets composed by low-strength coarse-grains to study the effects of size and strength on the crater scaling law.
10:55 AM
Sandtorf-McDonald J. R.* Chevrier V. F.
Clathrate Crater Profiles: Impact Modeling in Clathrate-Rich Locations [#2635]
This work uses iSALE shock physics program to model differences between craters produced in water ice and methane clathrate target surfaces.
11:05 AM
Panel Q&A
11:25 AM
Session Closure