Zur Beurteilung von Rissen bei elastoplastischem Werkstoffverhalten Abschlussbericht

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 prevailing conditions of geometry and microstructure which influence the deformation behavior in the plastic zone at the crack tip. A linear relationship between COS and J is shown to exist for situations even beyond onset of stable crack growth which is determined as a safe limit against failure using the potential method and the interrupted load procedure. (orig.)SIGLEAvailable from TIB Hannover: RN 1909(1976,4) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman