Effect of Pre-loading on Short Fatigue Crack Growth at a Notch

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J Mater Sci Technol ›› 1992, Vol. 8 ›› Issue (2): 79-83.

Effect of Pre-loading on Short Fatigue Crack Growth at a Notch

XU Kewei HE Jiawen ZHOU Huijiu ** Research Institute for Strength of Metals,Xi'an Jiaotong University,Xi'an,710049,China+ To whom correspondence should be addressed

Received:1992-03-28 Revised:1992-03-28 Online:1992-03-28 Published:2009-10-10

Abstract

Abstract: Results indicate that under cyclic tension the growth rate of short fatigue crack from notch root will be lowered greatly by tensile pre-loading,but only a little change by compressive pre-loading. The effect of tensile pre-loading will decrease with the increase of stress ratio.The variation of short fatigue crack growth rate is related to the residual stress distribution around notch root.

Key words: fatigue crack growth, residual stress, notch, X-ray diffraction

XU Kewei HE Jiawen ZHOU Huijiu ** Research Institute for Strength of Metals,Xi'an Jiaotong University,Xi'an,710049,China+ To whom correspondence should be addressed. Effect of Pre-loading on Short Fatigue Crack Growth at a Notch[J]. J Mater Sci Technol, 1992, 8(2): 79-83.

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Effect of Pre-loading on Short Fatigue Crack Growth at a Notch

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