Fracture Mechanical Strength Verification for Cracks subjected to Mixed-Mode-Loading
Hans Albert Richard, Paderborn
ABSTRACT The FKM-directive "Bruchmechanischer Festigkeitsnachweis", which was released in 2001, contains important hints and rules for the fracture mechanical assessment of mechanically loaded structures with imperfections, e.g. cracks. Thereby especially those cracks are under consideration, whose stress near fields are symmetric due to geometry and/or loading of the structure (so-called Mode I-cracks). In case of unsymmetric stress near fields one speaks of Mixed-Mode-loading. This also includes the special cases of pure Mode II (local plane shear loading of the crack) and pure Mode III (local out-of-plane shear loading of the crack). The fracture mechanical treatment of those Mixed-Mode-crack-problems indeed is a bit more complicated than simple Mode I loading, but the knowledge on unsymmetric crack loading has enormously increased in the recent years, so that those concepts should be integrated into the FKM-directive. The following paper consequently deals with the question, how such a fracture mechanical strength verification should look like.
Publication Source: Materialprüfung, ISSN: 0025-5300
Issue: 2003-11/12, pp -
Publisher: Carl Hanser Verlag München
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