Fatigue Pictures
Basic Fatigue Models/Approaches
· Stress-Life Approach(S-N) - for high cycle fatigue applications · Strain-Life Approach(e-N) - for low cycle fatigue situations. Good for crack
initiation stage. · The Linear Elastic Fracture Mechanics (LEFM)Approach - for low cycle
fatigue Good model for crack apropagation stage. |
Basic Fatigue Regimes
· Low Cycle Fatigue (LCF) Regime - for N<= 1000 cycles to fracture. · High Cycle Fatigue (LCF) Regime - for N>= 1000 cycles to fracture. · N=Ni + Np= crack initiation cycles + crack propagation cycles. |
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