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

材料科学技术（英）, 1992, 8(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

Keywords： fatigue crack growth , null , null , null

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.

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

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