Determination of dynamic fracture initiation toughness of elastic-plastic materials at intermediate strain rates
DOI:
https://doi.org/10.3989/revmetalm.2001.v37.i3.511Keywords:
Dynamic fracture, Fracture toughness, Elastoplastic materials, Experimental techniques, Intermediate strain rate,Abstract
An earlier paper dealt with the experimental techniques used to determine the dynamic fracture properties of linear elastic materials. Here we describe those most commonly used as elastoplastic materials, limiting the study to the initiation fracture toughness at the intermediate strain rate (of around 10 s2 s-1 ). In this case the inertial forces are negligible and it is possible to apply the static solutions. With this stipulation, the analysis can be based on the methods of testing in static conditions. The dynamic case differs basically, from the static one, in the influence of the strain rate on the properties of the material.
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