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Effect of Stress Ratio on Stress Intensity Factor of Type I Crack in A7N01 Aluminum Alloy

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Abstract:

Taking the mode I crack of finite width plate as the research object, the nodal displacement extrapolation method of type I stress intensity factor is discussed, and the stress intensity factor expressed by nodal displacement is obtained. Taking A7N01 aluminum alloy as the research object, the finite element software ABAQUS was used to numerical simulation and analysis. The effect of stress ratio on stress intensity factor K I was discussed. The results showed that in the same crack size ratio a/W, the stress intensity factor increases with the increase of the stress ratio; at the same stress ratio R, the stress intensity factor increases with increasing crack size ratio. At the same time, change law of the stress intensity factor increase: under the condition of different stress ratio, when a/W≤0.6, the increase of stress intensity factor is almost consistent; when a/W>0.6, the increase of stress intensity factor will increase obviously.

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Periodical:

Key Engineering Materials (Volume 774)

Pages:

259-264

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.774.259

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Online since:

August 2018

Authors:

You Tang Li, yadong wang, Long Yang

Keywords:

Crack Size Ratio, Displacement Extrapolation Method, Stress Intensity Factor, Stress Ratio, Type I Crack

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© 2018 Trans Tech Publications Ltd. All Rights Reserved

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