fracture-characteristics-of-brittle-materialsUneven tensile stressFlexural stress+++- Even tensile stressWallner linesTypical fracture characteristics of brittle materials:The smaller the primary fragments,the higher the stresslevels were. This permitsconclusions regardingthe stress distributionand the stress levels.Crack tip curves on pressure sideCrack initiationpoint withconcentric growthStress distribution across the fracture surfacePinnate crack on the pressure sideOrder of crack initiation1234Crack initiationDuring crack growth, crackscan only branch off at sightangles. This results in thefollowing order of crackinitiation: 1, 2 + 3, 41222The transversing crackwas the initial crackHighMediumLowPinnate fractureFracture mirrorMistFracture surface characteristics of the initiating crack in a brittlematerial