• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2024, Vol. 60 ›› Issue (18): 116-127.doi: 10.3901/JME.2024.18.116

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Research Progress on Fatigue Damage of Integrally Stiffened Structure

GAO Chong1,2, DONG Lihong2, WANG Haidou3, LIU Bin4, Lü Xiaoren1   

  1. 1. School of Mechanical Engineering, Shenyang University of Technology, Shenyang 110870;
    2. National Key Lab for Remanufacturing, Army Academy of Armored Forces, Beijing 100072;
    3. National Engineering Research Center for Remanufacturing, Army Academy of Armored Forces, Beijing 100072;
    4. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003
  • Received:2023-12-05 Revised:2024-05-08 Online:2024-09-20 Published:2024-11-15

Abstract: Large sized metal rotator components are widely used as the bearing part in high-end industrial equipment such as aerospace industry, missiles and submarines. Integrally stiffened structure is one of the typical structures of large sized metal rotary components, which has high specific strength and stiffness. It meets the requirements of new generation of aerospace vehicles, strategic missiles and ships and other equipment to be large-scale, lightweight, high reliability. Fatigue failure is one of the main failure mode of integral stiffened plate structure. The anisotropy of the integrally stiffened structure lead to uneven stress distribution, causing the propagation path of fatigue crack in the integrally stiffened structure is complex and changeable. Based on crack turning and across reinforcement, the two typical crack propagations, the crack arrest mechanism of the stiffener on the structure and its influencing factors are summarized. From the perspective of fracture mechanics, the research methods and research progress of stress intensity factor K, J integral and crack opening displacement parameters are summarized. From the perspective of damage mechanics theory and numerical model, the research situation of cohesive zone model, GTN and its modified model in the ductile damage of integrally stiffened structure is sorted out and analyzed, and the existing research problems and future development trend are further pointed out.

Key words: integrally stiffened structure, fatigue crack growth, fracture mechanics, damage model, crack arrest performance

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