The Prediction of Failure Situations Using the CTOD Concept Based on the Engineering Treatment Model (ETM)

  • K.-H. Schwalbe

Abstract

Under the assumption of plane stress conditions, the CTOD concept is extended such that a full R-curve methodology arises consisting of an experimental procedure for the determination of the R-curve (details of which are reported in a separate paper) and of the driving force prediction. Predictions of initiation and maximum loads are in reasonable agreement with experimental results.

Keywords

Strain Hardening 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    Harrison, J.D., M.G. Dawes, G.L. Archer, and M.S. Kamath: The COD approach and its application to welded structures, Research Report 55/1978/E; The Welding Institute, 1978.Google Scholar
  2. [2]
    BSI PD 6493: 1980, Guidance on some methods for the derivation of acceptance levels for defects in fusion welded joints, British Standards Institution, 1980.Google Scholar
  3. [3]
    Schwalbe, K.-H.: A simple estimation model for a centre cracked panel in tension, Proceedings of ICF International Symposium on Fracture Mechanics (Beijing), Science Press, Beijing, China, 1983.Google Scholar
  4. [4]
    Schwalbe, K.-H.: A simple engineering treatment of centre cracked tension panels in the regime of non-linear fracture mechanics under plane stress conditions, GKSS 84/E/38, GKSS Research Centre, Geesthacht, 1984.Google Scholar
  5. [5]
    Schwalbe, K.-H.: Some aspects of the crack tip opening displacement concept, to appear in a Special Issue on Fracture Mechanics of the Journal of the Aeronautical Society of India.Google Scholar
  6. [6]
    Hellmann, D., and K.-H. Schwalbe: Geometry and size effects on JR and,6R-curves under plane stress conditions, 15th National Symposium on Fracture Mechanics, College Park, MD, 1982, in: ASTM STP 833, 1984, pp. 577–605.Google Scholar
  7. [7]
    Schwalbe, K.-H., and D. Hellmann: Correlation of stable crack growth with the J-integral and the crack tip opening displacement, effects of geometry, size, and material, progress report on an investigation of the elastic-plastic R-curve methodology, GKSS 84/E/37, GKSS Research Centre, Geesthacht, 1984.Google Scholar
  8. [8]
    Schwalbe, K.-H.: Extension of the Engineering Treatment Model (ETM) to bending configurations under plane stress, to appear as a GKSS report.Google Scholar
  9. [9]
    Kumar, U., and C.F. Shih: Fully plastic crack solutions, estimation scheme, and stability analysis for the compact specimen, in: ASTM STP 700, pp. 406–438, 1980.Google Scholar
  10. [10]
    Aeberli, K.E.: Report in preparation.Google Scholar
  11. [11]
    Hellmann, D., and K.-H. Schwalbe: On the experimental determination of CTOD based R-curves, this workshop.Google Scholar
  12. [12]
    Royer, J., J.M. Tissot, A. Pelissier-Tanon, P. le Poac, and D.Miannay: J-integral determination and analysis for small test specimens and their usefulness for estimating fracture toughness, in: ASTM STP 668, pp. 334–357, 1979.Google Scholar
  13. [13]
    Amstutz, H., and T. Seeger: Bruchmechanische Analyse eines austenitischen Stahles (X6CrNi1811) an zwei Standardrißscheiben mit ebenem Spannungszustand, F1–2/1984, Technical University of Darmstadt.Google Scholar
  14. [14]
    Heerens, J.: Unpublished results.Google Scholar

Copyright information

© Springer-Verlag Berlin, Heidelberg 1986

Authors and Affiliations

  • K.-H. Schwalbe
    • 1
  1. 1.GKSS-Forschungszentrum Geesthacht GmbHGeesthachtFederal Republic of Germany

Personalised recommendations