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Resonance Frequency and Stiffness of Magnetic Bead Chain in Magnetic Field

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Abstract:

Experimental, theoretical, and numerical investigations have been carried out to evaluate resonance frequency and stiffness of a magnetic bead chain in the magnetic filed. Chains formed on a solenoid coil were vibrated by the sine-wave excitation and impact methods and the resonance frequency was deduced. It showed little dependency on the magnetic flux density and the bead diameter, because both the equivalent stiffness and the chain length were large in accordance with the increase of the magnetic flux density. These characteristics were confirmed by a theoretical consideration based on an assumption of potential energy minimization and a numerical calculation with the Distinct Element Method. Stiffness of the chain was directly measured by observation of chain deflection in inclined gravitational field and it also confirmed the dynamically deduced characteristics. It was concluded that the resonance frequency was 20–60 Hz and the static stiffness at the top of the chain was 10−4–10−2 N/m. The investigation is utilized for the improvement of the two-component magnetic blush development subsystem in electrophotography.

Document Type: Research Article

Publication date: January 1, 2002

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  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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