Results 21 to 30 of about 62,716 (304)
Depth of Cracking beneath Impact Craters: New Constraint for Impact Velocity [PDF]
, 2002 Both small-scale impact craters in the laboratory and less than 5 km in diameter bowl-shaped craters on the Earth are strength (of rock) controlled. In the strength regime, crater volumes are nearly proportional to impactor kinetic energy.
Ahrens, Thomas J. +2 more
core +1 more source
Impact cratering and the Oort Cloud [PDF]
Monthly Notices of the Royal Astronomical Society, 2008 We calculate the expected flux profile of comets into the planetary system from the Oort cloud arising from Galactic tides and encounters with molecular clouds. We find that both periodic and sporadic bombardment episodes, with amplitudes an order of magnitude above background, occur on characteristic timescales ~25-35 Myr.
Wickramasinghe, J. T., Napier, W. M.
openaire +2 more sources
A comparative analysis of two Early Palaeozoic marine impact structures in Estonia, Baltic Sea: Neugrund and Kärdla [PDF]
Bulletin of the Geological Society of Finland, 2013 Kärdla and Neugrund are two Early Palaeozoic offshore impact structures located some 50 km apart along the Estonian coast of the Baltic Sea. They share many similarities but differing features are also found. The Kärdla impact structure is located at the
S. Suuroja, K. Suuroja, T. Flodén
doaj +1 more source
Morphology Scaling of Drop Impact onto a Granular Layer
, 2010 We investigate the impact of a free-falling water drop onto a granular layer. First, we constructed a phase diagram of crater shapes with two control parameters, impact speed and grain size.
Katuragi, Hiroaki, 桂木, 洋光
core +1 more source
The Logoisk impact crater [PDF]
AIP Conference Proceedings, 2010 The review of the discovery and study of Logoisk impact crater is given.The review of the discovery and study of Logoisk impact crater is given.
N. V. Veretennikov +2 more
openaire +1 more source
Discovery of the Hailin impact crater in northeast China
Matter and Radiation at ExtremesA uniquely shaped impact structure, the Hailin impact crater, has been discovered in northeast China. The crater was formed on a granodiorite hillside and is an oval depression with asymmetric rim height and a maximum diameter of 1360 m.
Feng Yin +3 more
doaj +1 more source
Remote SensingSurface unloading due to impact cratering results in lava filling the crater floor. Elevation differences in the crater floor, a common geological phenomenon on the Moon, represent direct evidence of cratering processes.
Feng Liu, Yuanxu Ma, Guanghao Ha
doaj +1 more source
地质科技通报, 2021 At present, there are more than 190 craters have been confirmed on the earth, and most of the simple impact craters with a diameter of less than 1 km are formed by iron impactor.There is a large amount of iron meteorite material around the impact crater ...
Jingyue Cui +4 more
doaj +1 more source
Effect of Laser Deoxidation on Adhesive‐Bonded Aluminum in an Oxygen‐Free Atmosphere
Advanced Engineering Materials, EarlyView.This study investigates laser ablation of aluminum under oxygen‐free conditions. The goal is to produce oxide‐free substrates that enable improved adhesive bonding with epoxy. Optimized laser parameters (90% overlap, 300 µJ) combined with oxide‐free substrates result in the highest tensile strength of the adhesive bond.
Sandra Gerland +5 more
wiley +1 more source
Low-speed impact craters in loose granular media [PDF]
, 2003 We report on craters formed by balls dropped into dry, non-cohesive, granular media. By explicit variation of ball density $\rho_{b}$, diameter $D_{b}$, and drop height $H$, the crater diameter is confirmed to scale as the 1/4 power of the energy of the ...
D. J. Durian +10 more
core +3 more sources