Fatigue & Fracture of Engineering Materials & Structures · 2004 · 324 citations · 6 references
EngineeringFracture OptimizationMechanical EngineeringComputational MechanicsDynamic Crack PropagationFracture ModelingSudden FractureDamage MechanismMechanicsCrack GrowthFractured Rock MechanicsStructural Health MonitoringSolid MechanicsMaterial MechanicsLow-cycle FatigueMixed‐mode LoadingCivil EngineeringCrack FormationStructural MechanicsDamage EvolutionMechanics Of MaterialsFracture Mechanics
Crack growth can cause abrupt component failure, making it essential to quantify threshold values, crack paths, growth rates, and fracture toughness. This work investigates a crack subjected to mixed‑mode loading. The authors propose hypotheses and concepts that superimpose Mode I, II, and III loading to enable quantitative appraisal and prediction of crack paths.
ABSTRACT In many practical cases, the crack growth leads to abrupt failure of components and structures. For reasons of a reliable quantification of the endangerment due to sudden fracture of a component, therefore, it is of enormous importance to know the threshold values, the crack paths and the growth rates for the fatigue crack growth as well as the limiting values for the beginning of unstable crack growth (fracture toughness). This contribution deals with the complex problem of a—however initiated—crack, that is subjected to a mixed‐mode loading. It will present the hypotheses and concepts, which describe the superposition of Mode I and Mode II (plane mixed mode) as well as the superposition of all three modes (Mode I, II and III) for spatial loading conditions. Those concepts admit a quantitative appraisal of such crack situations and a characterization of possible crack paths.
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