Modified granular impact force laws for the OSIRIS-REx touchdown on the surface of asteroid (101955) Bennu

RL Ballouz, KJ Walsh, P Sanchez… - Monthly Notices of …, 2021 - academic.oup.com
The OSIRIS-REx mission collected a sample from the surface of the asteroid (101955)
Bennu in 2020 October. Here, we study the impact of the OSIRIS-REx Touch-and-Go …

Subsurface pulse, crater and ejecta asymmetry from oblique impacts into granular media

B Suo, AC Quillen, M Neiderbach, L O'Brient… - Icarus, 2024 - Elsevier
We carry out experiments of 104 m/s velocity oblique impacts into a granular medium (sand).
Impact craters have nearly round rims even at a grazing angle of about 10°, however, the …

A semi-empirical impact force model of irregular rockfall on granular layer and its experimental validation

W Li, S Yan, D Wang, H Zhang, G Scaringi, B Xiang… - Acta Geotechnica, 2024 - Springer
Rockfalls can pose a significant threat to traffic safety in mountainous areas. Galleries
covered by a granular layer have proven effective in protecting both the people and the …

Wind erosion and transport on planetesimals

AC Quillen, S Luniewski, AE Rubinstein, J Couturier… - Icarus, 2024 - Elsevier
We consider the possibility that aeolian (wind blown) processes occur on small, 1 to 100 km
diameter, planetesimals when they were embedded in the protosolar nebula. Drag from a …

[HTML][HTML] The influence of gravity on granular impacts-II. A gravity-scaled collision model for slow interactions

C Sunday, N Murdoch, A Wilhelm, M Drilleau… - Astronomy & …, 2022 - aanda.org
Context. Slow interactions on small body surfaces occur both naturally and through human
intervention. The resettling of grains and boulders following a cratering event, as well as …

Low-velocity impacts into granular material: application to small-body landing

N Murdoch, M Drilleau, C Sunday… - Monthly Notices of …, 2021 - academic.oup.com
With the flourishing number of small body missions that involve surface interactions,
understanding the mechanics of spacecraft–surface interactions is crucial for improving our …

Mechanistic framework for reduced-order models in soft materials: Application to three-dimensional granular intrusion

S Agarwal, DI Goldman… - Proceedings of the …, 2023 - National Acad Sciences
Soft materials often display complex behaviors that transition through apparent solid-and
fluid-like regimes. While a growing number of microscale simulation methods exist for these …

[HTML][HTML] A numerical simulation approach to the crater-scaling relationships in low-speed impacts under microgravity

O Çelik, RL Ballouz, DJ Scheeres, Y Kawakatsu - Icarus, 2022 - Elsevier
The many small-body exploration missions that have occurred over the last few decades
have shown that small solar system objects are covered with granular material of varying …

Ricochets on asteroids II: Sensitivity of laboratory experiments of low velocity grazing impacts on substrate grain size

E Wright, AC Quillen, P Sanchez, SR Schwartz… - Icarus, 2022 - Elsevier
We compare low velocity impacts that ricochet with the same impact velocity and impact
angle into granular media with similar bulk density, porosity, and friction coefficient but …

Surface particle motions excited by a low velocity normal impact into a granular medium

M Neiderbach, B Suo, E Wright, AC Quillen, M Lee… - Icarus, 2023 - Elsevier
In laboratory experiments, high speed videos are used to detect and track mm-size surface
particle motions caused by a low velocity normal impact into sand. Outside the final crater …