Abstract
A method based upon the Dugdale model is proposed to calculate the plastic zone size (pzs) at the crack tip of a Mode I crack emanating from notch of arbitrary shape. To provide a generalized method, a crack at the notch root was modeled as an edge crack in a semi-infinite plate subjected to the same stress as that generated near the notch root in the absence of a crack. The calculated pzs ahead of the tip of the crack emanating from circular and elliptical holes was in reasonable agreement with the accurate values reported in the literature. By making use of the calculated pzs , the near-threshold behavior of crack emanating from notch under cyclic loading condition was simulated by using McEvily’s fatigue crack growth equation. Subsequent comparison with the available experimental data revealed that the proper consideration of plastic zone size can capture the phenomena and trends observed in the experimental data with reasonable accuracy.
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Endo, M., Yanase, K. (2018). Analysis of the Plastic Zone Size Ahead of the Crack Tip in Notched Components and Its Application to Fatigue Problems. In: Prakash, R., Jayaram, V., Saxena, A. (eds) Advances in Structural Integrity. Springer, Singapore. https://doi.org/10.1007/978-981-10-7197-3_50
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DOI: https://doi.org/10.1007/978-981-10-7197-3_50
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