![]() ![]() ![]() Stress analysis A crack is formed… Will it extend further? If yes, will it propagate abruptly until catastrophic failure? Fracture mech.Ĭrack propagation : stress intensity factor Stress intensity factors KI, KII, KIII measure the intensity of stress singularity at crack tip. Stress concentrator: Critical stress is reached… Stress based criteria (like Von Mises) usually define the onset of “damage” initiation in the material Once critical stress is reached, what happens? In this case, a defect is now present (ie crack) The key question is now: will it propagate? If yes, will it stop by itself or grow in an unstable manner. 1 An introduction to Computationnal Fracture MechanicsĢ Stress based design vs Fracture Mechanics approach ![]()
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