Surface-crack propagation in plane-bending fatigue of smooth specimen of low-carbon steel

Hoshide, Toshihiko; Maekawa, Osamu

doi:10.1016/0013-7944(82)90150-3

Cited by 34 publications

(15 citation statements)

References 9 publications

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“…From the known amplitude of the nominal stresses, we determined the surface stresses, and then the amplitudes of the elastic and plastic strains. Table 1 shows that the calculated plastic strains at the surface are quite close to the numerical data of [7], which confirms the hypothesis that W a and W na are equal.…”

supporting

confidence: 79%

“…Use has been made of the [7] data to check the formulas, as there detailed studies were made on the strain and failure of plates in sign-varying bending, the material being annealed steel with 0.04% carbon, yield point 173 MPa, and ultimate strength 294 MPa. The fatigue limit in bending on the basis of 10 7 cycles was 158 MPa.…”

mentioning

confidence: 99%

“…The [7] data were compared with the calculated ones (see Table 1). From the known amplitude of the nominal stresses, we determined the surface stresses, and then the amplitudes of the elastic and plastic strains.…”

mentioning

confidence: 99%

“…Comparison of experimental[7] and calculated data on crack initiation and specimen failure: ---and A) specimen failure; ---and a) crack initiation; points are calculated data.…”

mentioning

confidence: 99%

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Mechanics of fine cracks in fatigue calculations. Part 2. Smooth specimen fatigue resistance in sign-varying bending

Khazhinskii

2006

Chem Petrol Eng

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The paper discusses applying the mechanics of small cracks to test results on smooth specimens for use in sign-varying bending. Approximate formulas are derived for the shape of the nucleating crack in bending and the rate of growth. A hypothesis is formulated and verified on the equality of the work done by nominal and real maximal stresses. Formulas are derived for estimating the few-cycle and many-cycle fatigue limits for sign-varying bending.

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supporting

confidence: 79%

mentioning

confidence: 99%

mentioning

confidence: 99%

“…Comparison of experimental[7] and calculated data on crack initiation and specimen failure: ---and A) specimen failure; ---and a) crack initiation; points are calculated data.…”

mentioning

confidence: 99%

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Mechanics of fine cracks in fatigue calculations. Part 2. Smooth specimen fatigue resistance in sign-varying bending

Khazhinskii

2006

Chem Petrol Eng

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“…Because the parameter is not applicable due to the loss of small scale yielding in the law, n a l, is expressed by only the crack length and assumptions, many mechanical parameters such as the range nominal stress amplitude, a crack in the specimen can be of J integral, ⌬J, and the range of strain intensity factor, approximated as one in a semifinite body only if the crack ⌬K , have been used in attempts to consolidate the growth is small enough compared to the specimen size. law of small cracks with that of large ones, [1,2,3] and each…”

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confidence: 99%

Significance of the small crack growth law and its practical application

Kawagoishi

Chen

Nisitani

2000

Metall Mater Trans A

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The effects of microstructure and specimen size on the fatigue crack growth rate of an annealed 0.42 C steel were investigated under uniaxial fatigue loading in air. Although a dramatic fluctuation of crack growth rate was found in the propagation process of microstructurally small cracks, the mean value of crack growth rate can be evaluated by a simple mechanical parameter, n a l (l, crack length; n, constant), under high stress levels where small-scale yielding conditions are exceeded. This parameter is also effective for cracks larger than 1 to 2 mm under high stress levels, as long as the finite boundary effect of a specimen on the driving force of crack propagation is considered. The crack growth rate of the alloy was described as a function of stress amplitude and crack length in terms of two mechanical parameters, n a l and ⌬K. The applicable conditions of the two parameters were discussed and manifested.

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Change in geometry of Surface Cracks during alternating tension and bending

Görner¹,

Mattheck²,

Munz³

1983

Materialwissenschaft Werkst

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Prufkorpern aus hochfestem, wasservergiitetem Baustahl mit 70 kp/mm2 FlieRgrenze. Der Stahlbau 12 (1970) 364-373. 24. E. Krageloh, Rechnung mit Formdehngrenzen im Zeitstandbereich, Mitteilungen der Vereinigung der Groakesselbesitzer 48 (1968) 363-366. 25. G. Robiller, C. Strapburger, Zum Bauschinger-Effekt unlegierter Stahle, Materialpriifung 11 (1969) 89-95.The change in geometry of surface cracks during alternating tension and bending is calculated using the stess intensity factors of Newman and Raju and of the ASME Boiler and Pressure Vessel Code. It is assumed that the crack extends at the deepest point and at the surface according to the stress intensity factors at these points. Calculations were performed with local K-values and with K-values obtained by a weighted averaging along the crack front. The obtained results were compared with results from the literature.

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Surface-crack propagation in plane-bending fatigue of smooth specimen of low-carbon steel

Cited by 34 publications

References 9 publications

Mechanics of fine cracks in fatigue calculations. Part 2. Smooth specimen fatigue resistance in sign-varying bending

Mechanics of fine cracks in fatigue calculations. Part 2. Smooth specimen fatigue resistance in sign-varying bending

Significance of the small crack growth law and its practical application

Change in geometry of Surface Cracks during alternating tension and bending

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