Tensile Stress-strain Properties of Paper and Paperboard and Their Constitutive Equations

  • YOKOYAMA T.
    Department of Mechanical Engineering, Okayama University of Science
  • NAKAI K.
    Department of Mechanical Engineering, Okayama University of Science
  • ODAMURA T.
    Graduate School of Engineering, Okayama University of Science

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抄録

The in-plane tensile stress-strain properties of two kinds of commercial paper and a kind of paperboard were determined in a compact testing machine equipped with an optical extensometer. Copy paper, sack paper made from unbleached kraft pulp and paperboard were tested at about 25°C and two different relative humidity of 25% and 55%. A dumbbell or dog-bone type specimen specified in the JIS Z 2201for sheet materials was used in the tension tests, instead of a constant-width strip specimen specified in the ASTM D828-97. Tension specimens were cut in three different orientations from each type of paper and paperboard on a paper cutter, following a steel plate. The thickness of paper and paperboard was carefully measured with a high-precision digital micrometer under a constant pressure. The tensile properties were shown to vary greatly, depending on the specimen shape and size, test direction, ambient relative humidity and strain rate. The Ramberg-Osgood equation was used to model the nonlinear stress-strain behavior.

収録刊行物

  • 実験力学

    実験力学 7 (Special_Issue), s68-s73, 2007

    日本実験力学会

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