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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 1991, Vol. 12 ›› Issue (2): 115-119.

• 论文 • Previous Articles     Next Articles

A STUDY ON SHORT FATIGUE CRACK GROWTH AT THE EDGE OF A NOTCH

Li Changchun1, Zhao Huixia1, Li Guangxia1, Zheng Minzhong2   

  1. 1. Huazhong University of Science and Technology;2. Aircraft Structure Strength Research Institute
  • Received:1990-06-18 Revised:1990-09-11 Online:1991-02-25 Published:1991-02-25

Abstract: Fatigue tests were carried out for single-edg notch specimens in order to study small crack propagation behaviour. Using the approximate formulae proposed by Haddad for computing J-integral, the experimental results are studied and a formula for predicting small crack growth rate expressed by the effective J-integral range ΔJeff is proposed.

Key words: small crack, J-integral, crack growth rate