INSTRUMENTED TENSILE IMPACT TESTS ON CENTER CRACKED PANELS - MECHANICAL AND METALLURGICAL RESULTS.

Load time histories of instrumented tensile impact tests (velocity 5. 5 m/s) on center cracked panels (thickness 8 mm, width 20-250 mm) are correlated with their fracture appearance in relation to temperature. For the tested strain rate, a transition temperature T//J//1//. //0 for impact loaded structures can be found. This temperature equals the T//i transition temperature of a static loaded large-scale specimen. For T//J//1//. //0 a correlation is found for the ratio of ultimate tensile stress to yield stress and the element carbon. Correlations to the instrumented Charpy V notch test were not successful.