Experimental study on scaling laws of sphere by low-speed oblique impact cratering
By designing a low-speed impact test device for sphere launch,the cratering experiments of sphere impacting dry sand target at different angles were carried out systematically.The influence of impact speed and angle on crater shapes was quantitatively analyzed.The crating process and mechanism of low-speed oblique impact of spheres on dry sand target were analyzed qualitatively,and the scaling laws of cratering under low-speed oblique impact conditions were modified.The applicability of the scaling laws under different impact conditions and its application in astronomy were discussed.Experimental results verify that the crater shape increases with the increase of impact speed,and the crater length and volume increase with the increase of impact angle.The crater width first decreases and then increases with the increase of impact angle,while the crater depth first increases and then decreases with the increase of impact angle.The cavity volume was scaled by parameters such as impact angle,impact speed,sphere diameter,density of sphere and gravity.The dissipative impact process was influenced by both the momentum and energy in the low-speed oblique impact cratering.
cratering effectlow-speed oblique impactdimensional analysisscaling lawexperimental study
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