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The mechanism of failure in bending of paperboard

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Abstract

The behaviour of paperboard beams subjected to pure bending is analysed and related to tensile and compression stress-strain behaviour. Since the compression strength is lower than the tensile strength, beam failure occurs in compression. However, beam failure does not occur when the ultimate strain in pure compression is reached in the surface fibres. A plastic yielding in compression, which gives good agreement between experimentally-determined and theoretically-calculated bending moments up to failure is therefore suggested. At failure, the elastic energy stored in the sample causes propagation of an interlaminar crack at the compression side, which is observed in scanning electron micrographs.

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Authors and Affiliations

  1. Swedish Forest Products Research Laboratory, Box 5604, S-114 86, Stockholm, Sweden

    Leif Carlsson, Christer Fellers & Alf De Ruvo

Authors
  1. Leif Carlsson
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  2. Christer Fellers
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  3. Alf De Ruvo
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Carlsson, L., Fellers, C. & De Ruvo, A. The mechanism of failure in bending of paperboard. J Mater Sci 15, 2636–2642 (1980). https://doi.org/10.1007/BF00550769

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  • DOI: https://doi.org/10.1007/BF00550769

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