Results 11 to 20 of about 13,652 (300)
Dynamics of shallow impact cratering [PDF]
Physical Review E, 2005 We present data for the time-dependence of wooden spheres penetrating into a loose non-cohesive packing of glass beads. The stopping time is a factor of three longer than the time $d/v_\circ$ needed to travel the total penetration distance $d$ at the impact speed $v_\circ$. The acceleration decreases monotonically throughout the impact.
Kamien, Randall D +2 more
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Granular impact cratering by liquid drops: Understanding raindrop imprints through an analogy to asteroid strikes. [PDF]
Proc Natl Acad Sci U S A, 2015 Zhao R, Zhang Q, Tjugito H, Cheng X.
europepmc +2 more sources
Formation mechanism of the Lidang circular structure in the Guangxi Province
Earth and Planetary Physics, 2019 The Lidang circular structure in the center of the Guangxi Province is about 8 km in diameter. This structure appears as an abnormal shallow depression that has disturbed the rather harmonic regional joint systems.
Pan Yan +4 more
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Numerical Simulations of the Apollo S‐IVB Artificial Impacts on the Moon
Earth and Space Science, 2021 The third stage of the Saturn IV rocket used in the five Apollo missions made craters on the Moon ∼30 m in diameter. Their initial impact conditions were known, so they can be considered controlled impacts.
A. Rajšić +8 more
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Analytical Model Formulation of Steel Plate Reinforced Concrete Walls against Hard Projectile Impact
Applied Sciences, 2022 Steel plate reinforced concrete (SC) walls can effectively resist projectile impact by preventing the rear concrete fragments flying away, thus attracting much attention in defence technology.
Bo Pu +3 more
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Penetration depth for shallow impact cratering [PDF]
, 2005 We present data for the penetration of a variety of spheres, dropped from rest, into a level non-cohesive granular medium. We improve upon our earlier work [Uehara {\it et al.} Phys. Rev. Lett. {\bf 90}, 194301 (2003)] in three regards. First, we explore
A. R. Abate +7 more
core +4 more sources
The self‐secondary crater population of the Hokusai crater on Mercury
Geophysical Research Letters, 2016 Whether or not self‐secondaries dominate small crater populations on continuous ejecta deposits and floors of fresh impact craters has long been a controversy. This issue potentially affects the age determination technique using crater statistics.
Zhiyong Xiao +2 more
doaj +1 more source
Nature Communications, 2020 The ~70 km-diameter Yarrabubba impact structure in Western Australia has previously been regarded as among Earth’s oldest meteorite craters, but has hitherto lacked absolute age constraints. Here, the authors determine a precise impact age of 2229 ± 5 Ma,
Timmons M. Erickson +4 more
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Magnetite in Muong Nong‐Type Australasian Tektites From South China
Geochemistry, Geophysics, Geosystems, 2023 South China belongs to the northern geographic branch of the Australasian strewn field (AASF) of tektites and microtektites, and this area is assumed to be part of the uprange region of the putative impactor trajectory that formed the yet undiscovered ...
Qing Pan +4 more
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Atmospheric effects on high-velocity impact cratering in porous sandstones [PDF]
EPJ Web of ConferencesGranular geomaterials feature varied porosity and may possess pore fluids. The interactions between grains, pores, and pore fluids affect the impact dynamics in the material such as the cratering efficiency, ejecta kinetics and crater morphology. In this
Singh Shachi +3 more
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