Residual stresses measurement by using ring-core method and 3D digital image correlation technique

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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  • Zhenxing Hu
  • Huimin Xie
  • Jian Lu
  • Jianguo Zhu
  • Huaixi Wang


Original languageEnglish
Article number85604
Journal / PublicationMeasurement Science and Technology
Issue number8
Publication statusPublished - Aug 2013


Ring-core method/three-dimensional digital image correlation (3D DIC) residual stresses measurement is proposed. Ring-core cutting is a mechanical stress relief method, and combining with 3D DIC system the deformation of the specimen surface can be measured. An optimization iteration method is proposed to obtain the residual stress and rigid-body motion. The method has the ability to cut an annular trench at a different location out of the field of view. A compression test is carried out to demonstrate how residual stress is determined by using 3D DIC system and outfield measurement. The results determined by the approach are in good agreement with the theoretical value. Ring-core/3D DIC has shown its robustness to determine residual stress and can be extended to application in the engineering field. © 2013 IOP Publishing Ltd.

Research Area(s)

  • 3D DIC, residual stress, ring-core