Digital Repository, ICF12, Ottawa 2009

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Determination and definition of fracture toughness of dynamically loaded ductile cast iron
H.-P. Winkler, R. Hüggenberg, A. Ludwig, G. Pusch, P. Trubitz

Last modified: 2013-05-07


For a complete review of component safety, special for accident conditions
where as a result of rupture load conditions rapid changes of stresses and
deformations occur. For that characteristic dynamic fracture material values
are necessary to calculate the stress conditions and to determine the margins
against brittle fracture.
For the experimental determination of dynamic fracture toughness values the
existing guidelines deliver only first approaches, they are orientated on the
rule for static tests.
The paper describe a evaluation procedure, that consider the influence of the
structure on the behaviour of crack-propagation of ductile cast iron at -40 °C
regarding the experimental determination of dynamic R-curves and the
definition of physical and technical crack initiation values.

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