Development Of Fatigue Limit Analysis Diagram

Author:  F Takahashi, K Ando, K TAKAHASHI, H OKADA, M Oohas
Source:  Conf Proc: ICSP-10 Tokyo, Japan 2008
Doc ID:  2008047
Year of Publication:  2008
ABSTRACT Development of Fatigue Limit Analysis Diagram: FLAD was conducted to estimate the fatigue limit of materials with a surface defect like a surface flaw. To make the FLAD, new criterion of cyclic plastic zone, based on Dugdale model, and cyclic Crack Tip Opening Displacement : CTOD, were proposed. The FLAD in this study considers the effect of stress ratio. Therefore, assuming the residual stress as the stress ratio, the shot peening effect was considered. The FLAD using new criterion was compared with literature data. As a result, the proposed FLAD concurred with experimental data despite differences in materials and stress ratios. KEY WORDS Fracture analysis diagram, Plastic zone, Crack tip opening displacement, Shot peening, Stress ratio

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