Internal strain around crack-tip

January 31, 2009

In situ neutron-diffraction study of internal strain evolution around a crack tip under variable-amplitude fatigue-loading conditions

S Y Lee et al

In situ neutron-diffraction measurements were performed to investigate the lattice-strain evolution around a fatigue crack under five different loading conditions (i.e., fatigued, tensile overloaded, compressive underloaded, tensile overloaded-compressive underloaded, and compressive underloaded-tensile overloaded) during fatigue crack growth. The results show that different crack-growth behaviors are closely related to the distinct strain distributions developed near the crack tip under the various loading conditions.


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