Journal of Northeastern University(Natural Science)

Journal of Northeastern University ›› 2004, Vol. 25 ›› Issue (8): 790-792.DOI: -

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Fractal characteristics of short fatigue cracks on surface of weld metal for titanium alloy

Hui, Li (1); Cao, Zhi-Tao (1); Xie, Li-Yang (1); He, Xue-Hong (1)   

  1. (1) Sch. of Mech. Eng. and Automat., Northeastern Univ., Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2004-08-15 Published:2013-06-24
  • Contact: Hui, L.
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Abstract: The grouping behaviour of short fatigue cracks on surface of the weld metal for TC2 titanium alloy was investigated according to the replicating experiment, and the replicas were analyzed on the basis of fractal theory. The results show that the feature of grouping behaviour of short fatigue crack satisfies fractal equation. The value of fractal dimension increases with the increase of the fatigue cycle frequency, and the value of fractal dimension can be regarded as a parameter to express better the fatigue damage and its evolution process.

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