A New Model for Predicting Small Crack Growth Rates

Hong Cai Zhang; K.Z. Huang; J.H. Cheng

doi:10.4028/www.scientific.net/MSF.471-472.330

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HomeMaterials Science ForumMaterials Science Forum Vols. 471-472A New Model for Predicting Small Crack Growth...

A New Model for Predicting Small Crack Growth Rates

Abstract:

A new model for predicting the small-crack growth rates is proposed under the constant amplitude loading. With the use of two important parameters, the transition crack length a0 and the barrier characteristic parameter d*, the new model can reflect the abnormal feature of small-crack growth. The effect of crack closure is considered in the model as well. The model is shown to provide a better correlation to the experimental results for the Ti-6Al-4V alloy under various stress levels at a stress ratio of R = 0.4.

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Periodical:

Materials Science Forum (Volumes 471-472)

Pages:

330-334

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.471-472.330

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Online since:

December 2004

Authors:

Hong Cai Zhang, K.Z. Huang, J.H. Cheng

Keywords:

Crack Closure, Paris Equation, Small Fatigue Cracks, Transition Crack Length

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