Abstract
The use of crack growth resistance curves (R−Δa) to predict the behaviour of cracked specimens is a well established practice for ceramic and cementitious materials. When the cohesive crack model can be applied to these materials it is shown that the use of R−Δa curves is equivalent to setting up an elastic equivalence that greatly simplifies the computations. This equivalence has its drawbacks and limitations. This paper analyzes a class of equivalences—the load (P) versus another variable—between cracked cohesive materials and linear elastic ones, ascertaining its applicability to the interpretations of fracture data.
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Elices, M., Planas, J. The equivalent elastic crack: 1. Load-Y equivalences. Int J Fract 61, 159–172 (1993). https://doi.org/10.1007/BF00012455
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DOI: https://doi.org/10.1007/BF00012455