Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
799813 | Journal of the Mechanics and Physics of Solids | 2009 | 11 Pages |
Abstract
We study the force vs. extension behaviour of a helical spring made of a thin torsionally stiff anisotropic elastic rod. Our focus is on springs of very low helical pitch. For certain parameters of the problem such a spring is found not to unwind when pulled but rather to form hockles that pop out one by one and lead to a highly non-monotonic force–extension curve. Between abrupt loop pop-outs this curve is well described by the planar elastica whose relevant solutions are classified. Our results may be relevant for tightly coiled nanosprings in future micro- and nano(electro)mechanical devices.
Keywords
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Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
E.L. Starostin, G.H.M. van der Heijden,