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Mechanics in Engineering ›› 2015, Vol. 37 ›› Issue (6): 674-682.doi: 10.6052/1000-0879-14-331

• Review • Previous Articles     Next Articles

AN APPLICABILITY ASSESSMENT OF LINEAR CUMULATIVE FATIGUE DAMAGE RULES

JI Yingfeng1, YAO Weixing2, XIA Tianxiang1   

  1. 1. College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
    2. Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2014-10-16 Revised:2015-01-21 Online:2015-12-15 Published:2015-02-11

Abstract:

The fatigue accumulative damage theories for metal materials can be divided into the following three categories:(1) linear cumulative damage theories of invariable damage;(2) linear cumulative damage theories of variable damage;(3) periodical linear cumulative damage theories of invariable damage. They are reviewed in this paper with respect to their theoretical bases, material constants, parameters involved, engineering applications and major typical models. Besides, several sets of variable loading tests of metal materials under a two-level spectrum, a multiple-level spectrum and a random spectrum are used to verify the major typical models. Finally, the applicable scopes and applications of the above three kinds of accumulative damage rules are compared and discussed according to their theoretical basis and the accuracy rate.

Key words:

fatigue cumulative damage|loading spectrum|fatigue life prediction

CLC Number: 

  • V231.95