Values of the crack tip opening stretch COS, the stress intensity factor K and the energy integral J are determined from direct optical and clip gage measurements as well as from load displacement curves for three modifications of the steel 22 NiMoCr 3 7 at room temperature. These parameters and their correlations are described as a function of the...
Germany
Germany
SIGLE / Available from TIB Hannover: QN 278(C) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische Informationsbibliothek / Bundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany) / DE / Germany
For two pressure vessel steels 15 MnNi 6 3 and 20 MnMoNi 5 5 as well as for the high temperature screw steel 21 CrMoV 5 7 uniaxial tensile tests and fracture mechanics tests on CT-specimens have been performed at different loading rates. In the temperature region between 150 C and 350 C the stress-strain behaviour of the two pressure vessel steels ...
Germany
This report described three simple crack propagation calculation procedures and compares the analytical results with measured crack growth curves. It was found that the PREFAS-Model revealed the best prediction and that the biaxial loading of the upper fuselage panels is the explanation for the slow crack growth of circumferential cracks. (orig./RH...
Germany
Germany
Germany
