The Mechanics of a Chain or Ring of Spherical Magnets
The Mechanics of a Chain or Ring of Spherical Magnets
复制标题
球形磁铁链或环的力学
DOI:
10.1137/120897973
复制
发表时间:
2013
影响因子:
1.9
通讯作者:
Hall C
中科院分区:
文献类型:
--
作者:
Hall C
Strong magnets, such as neodymium-iron-boron magnets, are increasingly being manufactured as spheres. Because of their dipolar characters, these spheres can easily be arranged into long chains that exhibit mechanical properties reminiscent of elastic strings or rods. While simple formulations exist for the energy of a deformed elastic rod, it is not clear whether or not they are also appropriate for a chain of spherical magnets. In this paper, we use discrete-to-continuum asymptotic analysis to derive a continuum model for the energy of a deformed chain of magnets based on the magnetostatic interactions between individual spheres. We find that the mechanical properties of a chain of magnets differ significantly from those of an elastic rod: while both magnetic chains and elastic rods support bending by change of local curvature, nonlocal interaction terms also appear in the energy formulation for a magnetic chain. This continuum model for the energy of a chain of magnets is used to analyze small deformations of a circular ring of magnets and hence obtain theoretical predictions for the vibrational modes of a circular ring of magnets. Surprisingly, despite the contribution of nonlocal energy terms, we find that the vibrations of a circular ring of magnets are governed by the same equation that governs the vibrations of a circular elastic ring.
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DOI:
--
发表时间:
1990
期刊:
影响因子:
--
作者:
J. I. Richards;Heekyung K. Youn
通讯作者:
Heekyung K. Youn
DOI:
10.1073/pnas.96.9.4769
发表时间:
1999-04-27
影响因子:
11.1
作者:
Gonzalez, O;Maddocks, JH
通讯作者:
Maddocks, JH
影响因子:
4.4
作者:
A. Clarke;G. Patey
通讯作者:
G. Patey
影响因子:
1.9
作者:
C. Hall;S. Chapman;J. Ockendon
通讯作者:
J. Ockendon
DOI:
--
发表时间:
2002
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
作者:
M. Yoon;D. Tománek
通讯作者:
D. Tománek