Study of Effective Stress Intensity Factor through the CJP Model Using Full-Field Experimental Data

In this work, the Christopher–James–Patterson crack tip field model is used to infer and assess effective stress intensity factor ranges measured from thermoelastic digital image correlation data. The range obtained via model, which provides an rationalization of fatigue growth rates, separated into two components representing elastic retardation shielding phenomena on growing cracks. For analysis, tests were performed Compact-Tension specimens manufactured in pure grade 2 titanium for different ratio levels, measurements made lengths. A good agreement (~2% average deviation) was found between results analysis indicating validity investigate fracture mechanics where plasticity plays important role. show importance considering crack-shielding effects using beyond exclusive closure influence.