Volume 30 Issue 10
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JIA Xu, HU Xu-teng, SONG Ying-dong. General weight functions for corner quarter-elliptical crack in three-dimensional rectangular plate[J]. Journal of Aerospace Power, 2015, 30(10): 2357-2367. doi: 10.13224/j.cnki.jasp.2015.10.009
Citation: JIA Xu, HU Xu-teng, SONG Ying-dong. General weight functions for corner quarter-elliptical crack in three-dimensional rectangular plate[J]. Journal of Aerospace Power, 2015, 30(10): 2357-2367. doi: 10.13224/j.cnki.jasp.2015.10.009
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General weight functions for corner quarter-elliptical crack in three-dimensional rectangular plate

doi: 10.13224/j.cnki.jasp.2015.10.009

  • 1. Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;

  • 2. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

  • Received Date: 2014-03-22
  • Publish Date: 2015-10-28
    Abstract
  • General weight functions of the corner quarter-elliptical crack in three-dimensional rectangular plate were studied. Uniform, higher-precision and relatively wider-application-range approximate expressions of reference stress intensity factors were obtained, by using the reference finite element data of the stress intensity factor when the crack surface was subjected to in-plane uniform, linear and secondary power law distribution loading along the plate width. On this basis, the general weight functions of the corner quarter-elliptical crack in three-dimensional rectangular plate were obtained, the accuracy of the general weight functions was validated by finite element method finally when the crack surface was subjected to in-plane 3,5,7 times power law distribution loading. The results show that the accuracy of established general weight functions is raised from 4%(point A) and 6%(point B) to 1.06%(point A) and 1.6%(point B) compared with the existing general weight functions. The accuracy of complementary validation of stress intensity factors calculated by general weight function method under seven times power law distribution loading reaches 3.67%(point A) and 7.45%(point B).

     

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