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| EFFECT OF OVERLOAD ON FATIGUE CRACK PROPAGATION NEAR THRESHOLD |
| by DENG Rongying (Institute of Mechanics; Academia Sinica; Beijing)(Manuscript received 12 May; 1986; revised manuscript 22 August; 1986) |
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Cite this article:
by DENG Rongying (Institute of Mechanics; Academia Sinica; Beijing)(Manuscript received 12 May; 1986; revised manuscript 22 August; 1986). EFFECT OF OVERLOAD ON FATIGUE CRACK PROPAGATION NEAR THRESHOLD. Acta Metall Sin, 1987, 23(5): 421-424.
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Abstract The effect of single tensile overload on crack propagation near the threshold in an austenite stainless steel has been investigated. The threshold value increases with the increase of overload ratio P_o/P_(max) as it is larger than 1.4. But the threshold value will not be effected by this ratio while it is less than 1.4. It was supposed that the reduction of crack propagation and increase of the threshold value arise primaryly from crack tip closure,i.e. plasticity-induced and roughness-induced closure.
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Received: 18 May 1987
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1 Jones R E. Eng Fract Mech, 1973; 5: 585
2 Matsuoka S, Tanaka K. Eng Fract Mech, 1978; 10: 515
3 Bathias C, Vancon M. Eng Fract Mech, 1978; 10: 409
4 邓蓉英,于桂清,李禾.金属学报,1986;22:A409
5 Elber W.ASTM, STP 486, 1971: 230
6 Schijve J. Rep Mp 195, National Luchtvaart Laloratorium Amsterdam, 1960b |
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