Experimental investigation on the impact force of the oblique water entry of a slender projectile with spring buffer

Sui, Yu-Tong; Ming, Fu-Ren; Wang, Shiping; Han, Rui

doi:10.1016/j.apor.2023.103631

Cited by 15 publications

(2 citation statements)

References 44 publications

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“…K was the consistency factor, and n was flow pattern index. C (n) was the correction factor, as shown in equation (12). It should be stated that the maximum Reynolds number in this paper was 0.37, which is much smaller than the Reynolds number when turbulence occurs (i.e.…”

Section: Viscous Resistance Model Between Matrix and Cipsmentioning

confidence: 90%

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High-velocity micromorphological observation and simulation of magnetorheological gel using programmable magneto-controlled microfluidics system and micro-tube dynamic models

Yu,

Gan,

et al. 2024

Smart Mater. Struct.

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Application of magnetorheological gel (MRG) is a promising tool for high performance mitigation due to its outstanding energy absorption and dissipation properties. However, the lack of recognition on micromorphological variation for MRG and its magneto-mechanical coupling mechanism limits its extensive application. Herein, combined with the magnetic sensitivity nature of MRG, we develop a magneto-controlled microfluidic system for flexible simulation towards ms-level impact conditions. Microstructural changes of MRG, prepared with solid-liquid composite method, are characterized from variable magnet-field setups and gradual velocities. Experiments reveal that the increasing magnetic flux density can effectively enhance the stability of chains in as-fabricated MRG, while the chains can support excessive velocities up to 4.5 m/s before breaking. Meanwhile, under the preset velocity range, the maximum change rates of the average and standard deviation for inclinations are 183.71% and 40.06%, respectively. Successively, an experiment-conducted microdynamic model is developed for numerical simulation of the MRG mechanical behaviors. During that, high-velocity MRG behaviors are explored with a tubular rather than regular flat-structure boundary condition setups, to pursue more trustable results. Simulation readouts meet nicely with those from experiments in revealing the magneto-mechanical coupling mechanism of MRG under multiphysics. The interaction between magnetic force, repulsive force and viscous resistance is mainly illustrated. This work provides a reliable observation basis for micromorphological variation of MRG, also suggests a new method for the mechanism of magneto-mechanical coupling at extreme velocities.

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Section: Viscous Resistance Model Between Matrix and Cipsmentioning

confidence: 90%

“…Therefore, highly-efficient mitigation materials are in great need to reduce the risk of impact loads [7,8]. However, traditional mitigation materials, such as honeycomb aluminums [9,10], springs [11,12], and hydraulic oil [13],…”

Section: Introductionmentioning

confidence: 99%