This paper presents the results of a numerical study undertaken to assess the influence of residual stresses on the ductile tearing behavior of a high strength low toughness aluminum alloy. The Gurson–Tvergaard model was calibrated against conventional fracture toughness data using parameters relating to void nucleation, growth, and coalescence. The calibrated model was used to predict the load versus ductile tearing behavior of a series of full-scale and quarter-scale wide-plate tests. These center-cracked tension tests included specimens that contained a self-balancing residual stress field that was tensile in the region of the through-wall crack. Analyses of the full-scale wide-plate tests indicated that the model provides a good prediction of the load versus the ductile tearing behavior up to approximately of stable tearing. The influence of residual stress on the load versus the crack growth behavior was accurately simulated. Predictions of the load versus the crack growth behavior of full-scale wide-plate tests for crack extensions greater than and of the quarter-scale tests were low in terms of predicted load at a given amount of tearing. This was considered to result from (i) the “valid” calibration range in terms of specimen thickness and crack extension, (ii) the development of shear lips, and (iii) the differences in the micromechanism of ductile void formation under plane strain and under plane stress conditions.
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e-mail: a.sherry@manchester.ac.uk
e-mail: mark.wilkes@sercoassurance.com
e-mail: john.sharples@sercoassurance.com
e-mail: peter.budden@british-energy.com
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November 2008
Research Papers
The Assessment of Residual Stress Effects on Ductile Tearing Using Continuum Damage Mechanics
Andrew H. Sherry,
e-mail: a.sherry@manchester.ac.uk
Andrew H. Sherry
The University of Manchester
, Sackville Street, Manchester, M60 1QD, UK
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Mark A. Wilkes,
e-mail: mark.wilkes@sercoassurance.com
Mark A. Wilkes
Serco Assurance
, Birchwood Park, Risley, Warrington WA3 6GA, UK
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John K. Sharples,
e-mail: john.sharples@sercoassurance.com
John K. Sharples
Serco Assurance
, Birchwood Park, Risley, Warrington WA3 6GA, UK
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Peter J. Budden
e-mail: peter.budden@british-energy.com
Peter J. Budden
British Energy Generation Ltd.
, Barnett Way, Gloucester GL4 3RS, UK
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Andrew H. Sherry
The University of Manchester
, Sackville Street, Manchester, M60 1QD, UKe-mail: a.sherry@manchester.ac.uk
Mark A. Wilkes
Serco Assurance
, Birchwood Park, Risley, Warrington WA3 6GA, UKe-mail: mark.wilkes@sercoassurance.com
John K. Sharples
Serco Assurance
, Birchwood Park, Risley, Warrington WA3 6GA, UKe-mail: john.sharples@sercoassurance.com
Peter J. Budden
British Energy Generation Ltd.
, Barnett Way, Gloucester GL4 3RS, UKe-mail: peter.budden@british-energy.com
J. Pressure Vessel Technol. Nov 2008, 130(4): 041212 (8 pages)
Published Online: October 14, 2008
Article history
Received:
February 8, 2006
Revised:
July 17, 2007
Published:
October 14, 2008
Citation
Sherry, A. H., Wilkes, M. A., Sharples, J. K., and Budden, P. J. (October 14, 2008). "The Assessment of Residual Stress Effects on Ductile Tearing Using Continuum Damage Mechanics." ASME. J. Pressure Vessel Technol. November 2008; 130(4): 041212. https://doi.org/10.1115/1.2967876
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