منابع مشابه
control of the optical properties of nanoparticles by laser fields
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15 صفحه اولLinear dynamics of elastic helical springs: asymptotic analysis of wave propagation
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متن کاملStretching helical nano-springs at finite temperature
Using dynamic simulations and analytic methods, we study the elastic response of a helical filament subject to uniaxial tension over a wide range of bend and twist persistence length. A low-pitch helix at low temperatures exhibits a stretching instability and the force-extension curve consists of a sequence of spikes. At elevated temperature (i.e. small persistence lengths) the helix melts and ...
متن کاملStructure of cholesterol helical ribbons and self-assembling biological springs.
We report the results of x-ray-scattering studies of individual helical ribbons formed in multicomponent solutions of cholesterol solubilized by various surfactants. The solutions were chemically defined lipid concentrate (CDLC) and model bile. In these and many analogous multicomponent surfactant-cholesterol solutions, helical ribbons of two well defined pitch angles, namely 11 degrees and 54 ...
متن کاملFinite Element Solution of Dynamic Response of Helical Springs
Abstract A numerical solution is presented to describe wave propagations in axially impacted helical springs. The governing equations for such problem are two coupled hyperbolic, partial differential equations of second order. The axial and rotational strains and velocities are considered as principal dependent variables. Since the governing equations are non-linear, the solution of the system ...
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ژورنال
عنوان ژورنال: Physical Review (Series I)
سال: 1902
ISSN: 1536-6065
DOI: 10.1103/physrevseriesi.14.129