Publication detail

Eccentricity Effect in the Hole-Drilling Residual Stress Measurement

NÁVRAT, T. HALABUK, D. VLK, M. VOSYNEK, P.

Original Title

Eccentricity Effect in the Hole-Drilling Residual Stress Measurement

English Title

Eccentricity Effect in the Hole-Drilling Residual Stress Measurement

Type

conference paper

Language

en

Original Abstract

The paper focuses on the analysis of the eccentricity effect in the measurement of the hole-drilling residual stress. Relaxed strains were evaluated by computational simulation of the hole-drilling experiment using the finite element method. Errors induced by eccentricity were estimated for elastic and elastic-plastic states in area around the drilled hole due to the stress concentration. The invariance of the stress change with depth was assumed. The correction of eccentricity and plasticity effects in evaluation of residual stresses was realized within the EVAL 7 software (SINT Technology). The analysis shows that in elastic state the eccentricity and angular position of the drilled hole have a significant effect on relative residual stress errors. Correction according to the HDM method is very effective in this case. If the relative error of 5 % is allowed, which is in engineering practice acceptable, eccentricity of ±0.05 mm could be accepted without correction. When the combination of eccentricity and plasticity occurs, the correction of plasticity is more important in method 13-EXT-UN.

English abstract

The paper focuses on the analysis of the eccentricity effect in the measurement of the hole-drilling residual stress. Relaxed strains were evaluated by computational simulation of the hole-drilling experiment using the finite element method. Errors induced by eccentricity were estimated for elastic and elastic-plastic states in area around the drilled hole due to the stress concentration. The invariance of the stress change with depth was assumed. The correction of eccentricity and plasticity effects in evaluation of residual stresses was realized within the EVAL 7 software (SINT Technology). The analysis shows that in elastic state the eccentricity and angular position of the drilled hole have a significant effect on relative residual stress errors. Correction according to the HDM method is very effective in this case. If the relative error of 5 % is allowed, which is in engineering practice acceptable, eccentricity of ±0.05 mm could be accepted without correction. When the combination of eccentricity and plasticity occurs, the correction of plasticity is more important in method 13-EXT-UN.

Keywords

residual stresses, hole-drilling method, plasticity, eccentricity

Released

10.01.2018

Publisher

Trans Tech Publications Ltd

ISBN

978-3-0357-1209-4

Book

Engineering and Innovative Materials VI

Pages from

208

Pages to

212

Pages count

5

BibTex


@inproceedings{BUT139312,
  author="Tomáš {Návrat} and Dávid {Halabuk} and Miloš {Vlk} and Petr {Vosynek}",
  title="Eccentricity Effect in the Hole-Drilling Residual Stress Measurement",
  annote="The paper focuses on the analysis of the eccentricity effect in the measurement of the hole-drilling residual stress. Relaxed strains were evaluated by computational simulation of the hole-drilling experiment using the finite element method. Errors induced by eccentricity were estimated for elastic and elastic-plastic states in area around the drilled hole due to the stress concentration. The invariance of the stress change with depth was assumed. The correction of eccentricity and plasticity effects in evaluation of residual stresses was realized within the EVAL 7 software (SINT Technology). The analysis shows that in elastic state the eccentricity and angular position of the drilled hole have a significant effect on relative residual stress errors. Correction according to the HDM method is very effective in this case. If the relative error of 5 % is allowed, which is in engineering practice acceptable, eccentricity of ±0.05 mm could be accepted without correction. When the combination of eccentricity and plasticity occurs, the correction of plasticity is more important in method 13-EXT-UN.",
  address="Trans Tech Publications Ltd",
  booktitle="Engineering and Innovative Materials VI",
  chapter="139312",
  doi="10.4028/www.scientific.net/DDF.382.208",
  howpublished="online",
  institution="Trans Tech Publications Ltd",
  number="1",
  year="2018",
  month="january",
  pages="208--212",
  publisher="Trans Tech Publications Ltd",
  type="conference paper"
}