Abstract
Linear elastic fracture mechanics relates fatigue crack growth with the stress intensity factor at the crack tip. Presence of residual deformations at the tip of a fatigue crack reduces the crack tip stress intensification such that effective stress intensity range ΔK e = U · ΔK . In this paper use of eddy current technique is exhibited to find the values of test value of effective stress range factor U test . A reasonable comparison between computed and experimental results of U 1 and U test on two Al alloys 6061-T6 and 6063-T6 has recommended the Eddy Current Technology for finding out the values of crack opening stress level under given loading conditions.
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