1981 Volume 1
Latest proceedings
- 1981
Cambridgepp 479-525Some New Concepts of the Relation between Fibre Orientation, Fibre Geometry, and Mechanical PropertiesAbstractPDFFollowing 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.
- 1981
Cambridgepp 527-559An Investigation of the Biaxial Failure Envelope of Paper: Experimental Study and Theoretical AnalysisAbstractPDFIn the theoretical part of this paper, the Tsai-Wu tensor theory is used to determine the equation for the biaxial strength envelope of a material.
One great advantage of using the Tsai-Wu theory for investigating biaxial strength envelopes is that it may be transformed to arbitrary co-ordinate axes by means of tensor transformation laws.
In the experimental part of the paper, the strengths in compression and shear are evaluated using thick-walled tubes consisting of two layers of paper glued together with a non-penetrating glue. In addition, the strength of paper under biaxial stress is determined by subjecting paper tubes to axial tension or compression combined with a radial tension caused by internal pressure.
In the final part of the paper, the application of the Tsai-Wu tensor theory to the prediction of failure of a corrugated container is discussed, as well as practical means of limiting the number of experiments necessary to establish the biaxial failure envelope of paper.