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R.W. Perkins and R.E. Mark. Some new concepts of the relation between fibre orientation, fibre geometry, and mechanical properties. In The role of fundamental research in paper-making, Trans. of the VIIth Fund. Res. Symp. Cambridge, 1981, (Fundamental Research Committee, ed.), pp 479–525, FRC, Manchester, 2018.


Following the initial work of Cox (1), a number of studies has been carried out with the objective of predicting the in-plane mechanical behaviour of paper in terms of the geometrical structure of the fibre network and the mechanical properties of the fibres. Recently Perkin s(2) developed a self-consistent model based on the straight segments of the fibres.

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