1994
DOI: 10.2208/jscej.1994.489_71 View full text |Buy / Rent full text
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Abstract: Fatigue crack growth behavior under single-peak overloads is investigated for structural steel JIS SM52OB. Fatigue test is carried out on seven center prenotched specimens.Three parameters, i. e. overload ratio, overload application stage and stress ratio are introduced to investigate the retardation effect. It is verified that fatigue crack growth rate is retarded after overloading and then gradually recovers to the normal.It is also observed that the retardation effect is intensified when the overload ratio … Show more

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“…Other researchers' results show that when multiple tensile overloads are closely applied, they may interact with each other to either enhance or reduce the overall crack growth retardation. Such overload interaction is dependent on the relative magnitude and the spacing between overloads [22][23][24][25][26][27][28] or the frequencies of the overload application [29][30][31][32][33].…”
Section: Resultsmentioning
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“…Other researchers' results show that when multiple tensile overloads are closely applied, they may interact with each other to either enhance or reduce the overall crack growth retardation. Such overload interaction is dependent on the relative magnitude and the spacing between overloads [22][23][24][25][26][27][28] or the frequencies of the overload application [29][30][31][32][33].…”
Section: Resultsmentioning
“…Isotropic elasticity and plasticity are assumed for the weld zone (FZ), HAZ and BM. Table 1 presents the material properties used in the FE analysis [23][24][25]. With these values we can deduce the strength mismatch factor of M, A preliminary simulation was performed to evaluate the effect of the HAZ on crack tip plasticity.…”
Section: Numerical Proceduresmentioning