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- W4226022014 abstract "The micro-jet is the main mechanism of cavitation on materials. More and more ultrasonic cavitation assisted machining uses the micro-jet effect in the industrial field. In this paper, the micro-jet impact is considered the micro-cutting process. To deeply analyze the micro-cutting mechanism of micro-jet, the size effect of materials was considered, and the micro-cutting force model of micro-jet was established and solved based on the spherical indentation test theory and the strain gradient plasticity theory. The results showed that the micro-cutting force and impact pressure of micro-jet with size effect are larger than those without size effect and the micro-cutting force of single micro-jet is within 2.35 N. The micro-cutting force of micro-jet increases exponentially with the increase of pit radius, but only slightly increases with the increase of pit depth. When the size effect is considered or not, the impact pressure of micro-jet is 1616–2922 MPa or 1615–1980 MPa, respectively. The increased ratio of micro-cutting force with size effect is $$left(sqrt{1+frac{2{overline{m} }^{2}{a}^{2}{G}^{2}bh}{left({a}^{2}+{h}^{2}right){sigma }_{mathrm{JC}}^{2}}-1}right)times 100%$$ , which can directly reflect the strength of size effect. The size effect is more obvious when the pit size is smaller, and the maximum increased ratio is 47.54%. The increased ratio increases nonlinearly with the decrease of pit radius and the increase of pit depth. It has a strong correlation with pit radius and pit depth. This paper can provide a theoretical viewpoint and support for the quantitative description of cavitation effect in ultrasonic-assisted machining." @default.
- W4226022014 created "2022-05-05" @default.
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- W4226022014 date "2022-01-08" @default.
- W4226022014 modified "2023-09-30" @default.
- W4226022014 title "Micro-cutting force model of micro-jet induced by cavitation collapse in the ultrasonic field at micro-nano scale" @default.
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- W4226022014 doi "https://doi.org/10.1007/s00170-021-08402-7" @default.
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