Fatigue is the progressive damage of a material subjected to repeated or fluctuating loading and can result in failure at stresses below the material's static strength. This section provides engineering guidance and reference data for fatigue life, cyclic loading, stress concentrations, endurance factors, fatigue resistance, high-cycle fatigue and impact loading.
Jump to: Metal Fatigue & Endurance Stress Concentration Factors fatigue_loading Fatigue & Endurance Factors Fatigue Life Fatigue Resistance Impact Loading (Fatigue) High Cycle Fatigue Strength
Often machine members subjected to repeated stressing are found to have failed even when the actual maximum stresses were below the ultimate strength of the material, and quite frequently at stress values even below the yield strength. The most distinguishing characteristics is that the failure had occurred only after the stresses have been repeated a very large number of times. Hence the failure is called fatigue failure
Introduction to metal fatigue, endurance, cyclic loading and cumulative fatigue damage.
Metal Fatigue & EnduranceStress concentration factors for geometric discontinuities, notches, fillets, holes and other changes in component geometry.
Stress Concentration FactorsAlternating, repeated and combined cyclic stresses, including mean stress, stress amplitude and stress ratio.
Fatigue LoadingFactors used to modify fatigue and endurance strength for practical component design and operating conditions.
Fatigue & Endurance FactorsGuidance on static, low-cycle, finite-life and high-cycle loading, including cumulative fatigue damage.
Fatigue LifeDesign, geometry, manufacturing and treatment methods for reducing stress concentrations and improving fatigue resistance.
Fatigue ResistanceImpact stress and deflection, gravity and kinetic impact, beam loading, energy effects and stress waves.
Impact LoadingEstimating finite-life fatigue strength from S-N relationships between low-cycle strength and endurance strength.
High Cycle Fatigue Strength