Xingyi Zhang

We present an experimental study of the relaxation of vertical and horizontal force components in an unsymmetrical high-temperature superconducting levitation system, with different initial cooling processes, after fixing the levitated body statically in a given position. It was found that the values of the relaxation measurements of the levitation force and lateral force remained constant or increased with time after vertical and horizontal traverses. The phenomenon has been theoretically described based on the Bean model and the thermally activated flux creep theory. The criterion developed in the present work is considered to be suitable for providing qualitative predictions of the relaxation properties in the levitation force and lateral force.

Magnetic Levitation

10.1088/0953-2048/22/2/025006

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Citations (17)

An improvement of frozen-image model and its application in a HTS levitation system

Theoretical and Applied Mechanics Letters (2011)

Jùn Zhou Xingyi Zhang Youhe Zhou

This paper mainly reports an improvement of frozen-image model which can qualitatively describe the influence of lateral moving speed on vertical force in a HTS levitation system under lateral movement with field-cooling condition. The model is improved by introducing a dipole which represents the influence of lateral moving speed and modifying the rule of diamagnetic dipole based on frozen-image model. The vertical and lateral forces that are obtained by this improved model agree with the previous measurements qualitatively. This model can also describe the effect of finite scale of superconductor sample in a levitation system.

Diamagnetism

Magnetic Levitation

Scale model

10.1063/2.1103101

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Citations (5)

Effective Young’s modulus of the artificial muscle twisted by fishing lines: Analysis and experiment

AIP Advances (2015)

Donghua Yue Xingyi Zhang Jùn Zhou Youhe Zhou

Artificial muscles transformed by fishing lines or sewing thread, have distinguished advantages, e. g., fast, scalable, nonhysteretic, and long-life, which have been proposed by Haines et al. [Science 343, 868 (2014)]. In this paper, we present a geometrical model to predict the effective Young’s modulus of the basic structure that is twisted by three fishing lines with the same diameter. Moreover, series of experiments are carried out to verify the present model, and it is found the theoretical calculations take good agreements with the experimental results.

10.1063/1.4930585

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Citations (7)

The coherent gradient sensor for thin film curvature measurements in multiple media

Optics and Lasers in Engineering (2014)

Cong Liu Xingyi Zhang Jun Zhou Youhe Zhou

Silicone oil

10.1016/j.optlaseng.2014.08.013

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Citations (4)

Direct Measurement on the Residual Stress in $$\hbox {YBa}_2\hbox {Cu}_3\hbox {O}_{7\text {-}\updelta }$$ Bulk Superconductors Fabricated by Top-Seed Melt-Textured Method

Acta Mechanica Solida Sinica (2020)