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Propagation of “small fatigue crack” initiated from notch-root

✍ Scribed by Furuya Yasubumi; Shimada Heihachi

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
645 KB
Volume
19
Category
Article
ISSN
0013-7944

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📜 SIMILAR VOLUMES

Effect of notch root radius on the initi
Effect of notch root radius on the initiation and propagation of fatigue cracks
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Under the conditions of constant nominal applied stress. increasing notch root radius causes an increase in the number of cycles to initiate a fatigue crack at a notch root. An explanation of the effect is given in terms of the effective stress concentration factor of the notch. Data are presented w

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## Alldraet -Thef&urepraxgses of micro or small cracks may behave differently as suggested by ~ntinu~ medium mechanics. A minimum fracture unit should exist for a real ~1~ material, for any part sruaher than this unit fracture mechanics caunot be applied. Based on this idea, the elastic stress and

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Theoretical estimation of fatigue limit of notches under axial push-pull loading was made with an emphasis on the formation of non-propagating crack. A critical notch radius and a critical stress concentration factor were determined so as to distinguish notch fatigue limits with crack initiation and

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Using the crack initiation measurements for notched specimens with various geometry (CT and axisymetric notched specimens) and different notch radii, we will try to determine the number of cycles to initiate a fatigue crack in the vicinity of stress concentration. ## NOMENCLATURE nominal stress a