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Materials Science

, Volume 50, Issue 4, pp 488–495 | Cite as

Determination of the Local Strains Near Stress Concentrators by the Digital Image Correlation Technique

  • Ya. L. Ivanyts’kyi
  • Yu. V. Mol’kov
  • P. S. Kun’
  • T. M. Lenkovs’kyi
  • M. Wójtowicz
Article

We analyze the specific features of determination of the local strains in materials in the vicinity of stress concentrators of different radii by the digital image correlation method. The dependences of the critical local strains on the spacing used for their measuring in smooth specimens and specimens with stress concentrators and fatigue cracks are established. Recommendations concerning the choice of the optimal spacing for measuring local strains are presented. The stress-strain diagrams of 65G steel are constructed on the “true-stress–local strain” coordinates.

Keywords

local strains stress concentration digital image correlation spacing for strain measurements strain distribution true stress–strain diagram plastic strain carbon steel 

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Ya. L. Ivanyts’kyi
    • 1
  • Yu. V. Mol’kov
    • 1
  • P. S. Kun’
    • 1
  • T. M. Lenkovs’kyi
    • 1
  • M. Wójtowicz
    • 2
  1. 1.Karpenko Physicomechanical InstituteUkrainian National Academy of SciencesLvivUkraine
  2. 2.University of Technology and HumanitiesRadomPoland

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