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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2007, Vol. 28 ›› Issue (3): 579-581.

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Closed Form Solution of Damage Mechanics to Predict the Fatigue Life of Axially Symmetric Bars with Grooves

BAI Zhao-yu,MENG Xian-hong,ZHANG Xing   

  1. School of Aeronautical Science and Technology, Beijing University of Aeronautics and Astronautics
  • Received:2005-11-15 Revised:2006-10-24 Online:2007-05-10 Published:2007-05-10
  • Contact: MENG Xianhong

Abstract:

A conservative integral of axially symmetric bars with grooves in damage mechanics is established for the first time. By means of the path independent property of this integral and the condition of small scale damage, it is proved that the specific strain energy with damage is equal to that without damage at the point of stress concentration.

Key words: axially , symmetric , bars , with , grooves,  , damage , mechanics,  , conservative , integral,  , fatigue , damage , evolutionparameters,  , median , S-Ncurve

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