Fatigue and fracture mechanics

Fatigue and fracture mechanics examines how materials accumulate damage under repeated or varying loads and how cracks initiate, grow, and eventually cause failure — processes that govern the safe lifespan of everything from aircraft components to bridge joints. Central to the work are quantities like stress intensity factors, which characterize the stress environment near a crack tip, and fracture toughness, which measures a material's resistance to sudden crack propagation. Researchers are actively refining how to account for complicating realities: the way crack surfaces press together during unloading (crack closure) can slow growth in ways simple models miss, multiaxial stress states in real structures rarely match laboratory specimens, and the inherent variability of a material's microstructure means fatigue life predictions carry irreducible uncertainty. Open challenges include building models that connect grain-scale damage mechanisms directly to component-level life predictions, and developing faster experimental methods — such as thermographic techniques that detect heat dissipation during cycling — to characterize fatigue limits without running millions of load cycles.

Works

117,073

Total citations

1,317,764

Keywords

Fatigue Crack ClosureFracture Toughness TestingMultiaxial Fatigue CriterionThermographic MethodologyMicrostructure-Sensitive ModelingProbabilistic Fatigue Life Prediction