Abstract
Dynamic J-†a curves might be constructed by means of the results of various low-blow tests, where the experimental settings of the instrumented Charpy-V test are chosen in order to assure significant crack growth due to impact loading on the one hand and in order to avoid complete rupture on the other hand. While the final crack advance †a f can be measured for every low-blow test, the corresponding values for J have to be estimated in general from the load-deflection curve using standard concepts of conventional elastic plastic fracture mechanics. The experimental effort could be significantly reduced if a single specimen test method were used instead of this multi-specimen testing. The aim of the present work is to qualify the Key-Curve-Method (KCM), originally proposed by Ernst et al. [1] for quasi-static fracture tests, for this purpose.
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