Abstract
Pulsating tension fatigue tests have been carried out on edge-notched specimens of a mild steel and measurements of electrical potential drop across notches have been used to determine the number of cycles to initiate cracks. The results can be described by using the range of stress intensity factor for the sharp crack situation modified to take into account the notch root radius.
The models of plastic relaxation at a crack tip and analyses of the elastic stress distribution at cracks and notches are used to discuss the results. Limited evidence in the literature indicates that the stress intensity approach may provide a general description of crack initiation and propagation in notched specimens.
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References
P. C. Paris and F. Erdogan, ASME Paper 62-WA-234 (1962).
N. E. Frost and D. S. Dugdale, J. Mechanics and Physics of Solids, 6, (1958) 92.
B. A. Bilby, A. H. Cottrell and K. H. Swinden, Proc. Roy. Soc. A. 272 (1963) 304.
J. Weertman, Int. J. Fract. Mech., 2 (1966) 460.
B. A. Bilby and P. T. Heald, Proc. Roy. Soc. A. 305 (1968) 429.
W. F. Brown and J. E. Strawley, ASTM STP 410 (1966).
D. M. Gilbey and S. Pearson, Royal Aircraft Establishment Tech. Rep. 66402 (1966).
O. L. Bowie and D. M. Neal, U.S. Army Materials Research Agency Tech. Rep. AMRA TR65-20 (1965).
L. P. Pook, Int. J. Fract. Mech. 4 (1968) 295.
A. N. May, Nature 185 (1960) 303.
A. N. May, Nature 188 (1960) 573.
J. H. Gittus, Nature 202 (1964) 788.
R. A. T. Dawson, W. J. Elder, G. J. Hill and A. T. Price, Thermal- and High Strain Fatigue Int. Conf. 1967, Metals and Metallurgy Trust Monograph and Report No. 325, 239.
E. Smith, Proc. Roy. Soc. A. 299 (1967) 455.
A. H. Cottrell, Proc. Roy. Soc. A. 285 (1965) 10.
Third Report of a Special ASTM Committee, Mats. Res. and Standard, 1 (1961) 877.
V. Weiss and S. Yukawa, ASTM STP 381 (1965).
A. S. Tetelman and A. J. McEvily, Fracture of Structural Materials, John Wiley & Sons (1967).
L. R. Jackson, DMIC Memo 178, Battelle Memorial Inst., Columbus, Ohio (1963).
V. Weiss, ASME Paper 62-WA-270 (1962).
H. Neuber, Theory of Notch Stresses, Springer, Berlin (1958).
R. G. Forman, V. E. Kearney and R. M. Engle, J. Basic Eng. Trans. ASME 89 (1967) 459.
J. D. Harrison, Welding Institute Report E20/3/69.
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Jack, A.R., Price, A.T. The initiation of fatigue cracks from notches in mild steel plates. Int J Fract 6, 401–409 (1970). https://doi.org/10.1007/BF00182628
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DOI: https://doi.org/10.1007/BF00182628