Abstract
The stress intensity factor concept for describing the stress field at pointed crack or slit tips is well known from fracture mechanics. It is substantially extended here in two directions. One extension refers to pointed V-notches with stress intensities depending on the notch opening angle. The loading mode related notch stress intensity factors K 1, K 2 and K 3 are introduced. Another extension refers to rounded notches with crack shape or V-notch shape in two variants: parabolic, elliptic or hyperbolic notches (‘blunt notches’) on the one hand and root hole notches (‘keyholes’ when considering crack shapes) on the other hand. Here, the loading mode related generalised notch stress intensity factors K 1ρ , K 2ρ and K 3ρ are defined. The concepts of elastic stress intensity factor, notch stress intensity factor and generalised notch stress intensity factor are extended into the range of elastic-plastic (work-hardening) or perfectly plastic notch tip or notch root behaviour. Here, the plastic notch stress intensity factors K 1p, K 2p and K 3p are of relevance. The original stress intensity factor concept is also transferred from cracks or slits to rigid thin inclusions.
Published Version
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