Deformation And Warping In Magnetic Tapes By Laser Speckle Technique

    Authors

    M. A. Seif; F. A. Moslehy;S. L. Rice

    Comments

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    Abbreviated Journal Title

    J. Elastomer Plast.

    Keywords

    Surface; Materials Science, Multidisciplinary; Polymer Science

    Abstract

    Laser speckles appear as a pattern of fine randomly distributed dots resulting from multiple interference when an optically ''rough'' surface is illuminated by a coherent laser beam. By photographing a speckle pattern, the positions of all points on a surface are ''fingerprinted'' and any changes in position can be detected with high sensitivity. Such speckle patterns can be used as a non-contact, nondestructive, quantitative tool to measure in-plane deformations in magnetic tapes subjected to tension. Because such tapes not only stretch but also warp, the obtained data reflect the projection of the deformation vector in the longitudinal plane of the tape. By geometrical relations, all three components of the deformation vector at any point of interest can be determined. This article presents data that were obtained for a commercial computer data cartridge tape (40 Mb Format). It is shown that with such data, stress-strain relations can be established and the overall deformation behavior of the material can be understood.

    Journal Title

    Journal of Elastomers and Plastics

    Volume

    25

    Issue/Number

    3

    Publication Date

    1-1-1993

    Document Type

    Article

    Language

    English

    First Page

    216

    Last Page

    223

    WOS Identifier

    WOS:A1993LE14200002

    ISSN

    0095-2443

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