Dynamically Rotating Magnetic Levitation to Characterize the Spatial Density Heterogeneity of Materials
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Published:2023-05
Issue:20
Volume:10
Page:
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ISSN:2198-3844
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Container-title:Advanced Science
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language:en
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Short-container-title:Advanced Science
Author:
Gao Qiu‐Hua1,
Song Peng‐Hui1,
Zou Hong‐Xiang2,
Wu Zhi‐Yuan1,
Zhao Lin‐Chuan1,
Zhang Wen‐Ming13ORCID
Affiliation:
1. State Key Laboratory of Mechanical System and Vibration School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 P. R. China
2. Hunan Provincial Key Laboratory of Vehicle Power and Transmission System Hunan Institute of Engineering 88 Fuxing East Road Xiangtan 411104 P. R. China
3. SJTU Paris Elite Institute of Technology Shanghai Jiao Tong University Shanghai 200240 P. R. China
Abstract
AbstractMagnetic levitation (MagLev) is a promising technology for density‐based analysis and manipulation of nonmagnetic materials. One major limitation is that extant MagLev methods are based on the static balance of gravitational‐magnetic forces, thereby leading to an inability to resolve interior differences in density. Here a new strategy called “dynamically rotating MagLev” is proposed, which combines centrifugal force and nonlinear magnetic force to amplify the interior differences in density. The design of the nonlinear magnetic force in tandem with centrifugal force supports the regulation of stable equilibriums, enabling different homogeneous objects to reach distinguishable equilibrium orientations. Without reducing the magnetic susceptibility, the dynamically rotating MagLev system can lead to a relatively large change in orientation angle (∆ψ > 50°) for the heterogeneous parts with small inclusions (volume fraction VF = 2.08%). The rich equilibrium states of levitating objects invoke the concept of levitation stability, which is employed, for the first time, to characterize the spatial density heterogeneity of objects. Exploiting the tunable nonlinear levitation behaviors of objects provides a new paradigm for developing operationally simple, nondestructive density heterogeneity characterization methods. Such methods have tremendous potential in applications related to sorting, orienting, and assembling objects in three dimensions.
Funder
Shanghai Municipal Education Commission
Program of Shanghai Academic Research Leader
National Natural Science Foundation of China
National Postdoctoral Program for Innovative Talents
China Postdoctoral Science Foundation
Subject
General Physics and Astronomy,General Engineering,Biochemistry, Genetics and Molecular Biology (miscellaneous),General Materials Science,General Chemical Engineering,Medicine (miscellaneous)