influences-at-crack-tip-behaviorMinimal deformation-retardation leadsto a large plastic zone in the surfacearea. These are "balanced stressconditions." In this zone, tough fracture behavior can be observed.Shear surfaces are typical.Large deformation-retardation to asmall zone on the inside of thespecimen. These are "balanced strain conditions." In this zone, brittle fracture behavior can beobserved.Crack planeCrackPlastically deformed zoneahead of the crack tipBStress conditions atthe crack tip (stressintensity)Material properties(crack toughness, crack growth)KIc, KISCC, da/dN= f ( K) Operating loadsCrack sizeInfluencing factors for fracture-mechanicalanalysis. Influences on the behavior of a crack tip