Abstract
The crack opening behaviors of monotonically loaded stationary and growing cracks in Al-Fe-X alloys have been examined using the stereoimaging technique. Crack opening displacements (COD’s) have been measured as a function of distance behind the crack tip at different load levels. By comparing with existing asymptotic solutions, the experimental COD results confirm the dominance of the HRR (Hutchinson,[4,6] and Rice and Rosengren[5]) singularity in a stationary crack, the logarithmic singularity in a growing crack, and the transition from the HRR to the logarithmic singularity when a stationary crack extends by a small increment. In addition to the In (r) singularity, experimental evidence suggests the presence of a In2 (r) singularity in plane stress cracks growing into intense shear bands.
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Chan, K.S. Crack-tip behaviors of stationary and growing cracks in Al-Fe-X alloys: Part II. Crack opening profile. Metall Trans A 21, 81–86 (1990). https://doi.org/10.1007/BF02656426
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DOI: https://doi.org/10.1007/BF02656426