NC State
O.J. Kallmes and G.A. Bernier. Mechanical properties of paper: Part 1 – Elasticity of handsheets. In The Formation and Structure of Paper, Trans. of the IInd Fund. Res. Symp. Oxford, 1961, (F. Bolam, ed.), pp 369–388, FRC, Manchester, 2018.


A theory of the elasticity of handsheets has been formulated, based on the hypothesis that elastic deformation is caused by bending and, to a small extent, shearing and stretching of the unbonded parts of the fibres within the plane of the sheet. Experiments have shown that the theory holds for dense, well-bonded sheets, but deviates for light, poorly bonded sheets by a factor directly related to a geometric property the mean free fibre length . It is concluded that the arrangement of the fibres in handsheets is the connecting link between the fibre properties and sheet elasticity.

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