A fatigue crack growth prediction model for cracked specimen under variable amplitude loading
Wung Jae Wang, Man‐Sung Yim
Abstract
The objective of this study was to propose a crack growth prediction model for cracked specimens under large and variable amplitude loading conditions. In this study, the concept of change in net-section strain energy was applied to simulate elastic–plastic fracture behavior, and three-dimensional fitting of the results with respect to changes in the net-section strain energy, load ratio, and crack growth rate was performed to create the crack growth prediction model. The validity of the generated model was examined using comparisons with experimental data as well as simulation results from existing crack growth models under several variable loading conditions.
Topics & Concepts
Materials scienceAmplitudeStructural engineeringParis' lawVariable (mathematics)Fracture (geology)Fracture mechanicsCrack closureStrain energyPlasticityCrack growth resistance curveGrowth modelGrowth rateStrain energy release rateComposite materialMechanicsEngineeringFinite element methodMathematicsGeometryMathematical analysisPhysicsMathematical economicsQuantum mechanicsFatigue and fracture mechanicsUltrasonics and Acoustic Wave PropagationNon-Destructive Testing Techniques