Applied Mathematics and Mechanics (English Edition) ›› 2001, Vol. 22 ›› Issue (6): 642-649.

• 论文 • 上一篇    下一篇

AN INVESTIGATION OF RANDOM FATIGUE STRENGTH OF K-TYPE TUBULAR JOINTS AND CRACK PROPAGATION BEHAVIORS

聂国华1, 张若京1, 刘人怀2   

  1. 1. Key Laboratory of Solid Mechanics of MOE, Tongji University, Shanghai 200092, P.R.China;
    2. Institute of Applied Mechanics, Jinan University, Guangzhou 510632, P.R.China
  • 收稿日期:2000-01-28 修回日期:2000-11-21 出版日期:2001-06-18 发布日期:2001-06-18
  • 通讯作者: LIU Ren-huai,Member of Editorial Committee,AMM
  • 基金资助:
    the Key Speciality of the Shanghai Education Committee

AN INVESTIGATION OF RANDOM FATIGUE STRENGTH OF K-TYPE TUBULAR JOINTS AND CRACK PROPAGATION BEHAVIORS

NIE Guo-hua1, ZHANG Ruo-jing1, LIU Ren-huai 2   

  1. 1. Key Laboratory of Solid Mechanics of MOE, Tongji University, Shanghai 200092, P.R.China;
    2. Institute of Applied Mechanics, Jinan University, Guangzhou 510632, P.R.China
  • Received:2000-01-28 Revised:2000-11-21 Online:2001-06-18 Published:2001-06-18
  • Supported by:
    the Key Speciality of the Shanghai Education Committee

摘要: Random fatigue of welded K-type tubular joints subjected to axial or out-of-plane bending load is analyzed. By considering the sizes of initial surface cracks and material constants as random variables with some probabilistic distributions, incorporating the effect of the weld, five hundred random samples are generated. Statistical computational results of life of crack propagation and effect of change of crack shape are finally obtained and compared with experimental data available based on a regression analysis. Meanwhile, crack propagation behaviors are also investigated.

Abstract: Random fatigue of welded K-type tubular joints subjected to axial or out-of-plane bending load is analyzed. By considering the sizes of initial surface cracks and material constants as random variables with some probabilistic distributions, incorporating the effect of the weld, five hundred random samples are generated. Statistical computational results of life of crack propagation and effect of change of crack shape are finally obtained and compared with experimental data available based on a regression analysis. Meanwhile, crack propagation behaviors are also investigated.

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