Orientation Dependence of In-Plane Tensile Properties of Paper : Experiments and Theories

概要

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The in-plane tensile properties of machine-made paper were determined using both a compact testing machine equipped with an optical extensometer and a high-speed digital image sensor. Three different kinds of paper were tested in a controlled. Constant-width strip specimens were adopted in the tension tests. Thin strip tensile specimens were cut on a paper cutter in five different orientations between machine direction (MD) and cross-machine direction (CD). The thickness of each paper was carefully measured with a high-precision digital micrometer under a constant pressure. The in-plane elastic constants and tensile strengths as a function of orientation were measured and compared with theoretical predictions from both the orthotropic elasticity theory and the Tsai-Hill failure theory in composite materials. It was shown that the orientation dependence of the in-plane tensile properties can be analyzed using composite theories.
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