The interaction of ductile tearing and creep crack growth

被引：1
作者：
Ainsworth, R.A. [1 ]
Booth, S.E. [2 ]
机构：
[1] University of Manchester, Sackville Street, Manchester
[2] EDF Energy Generation, Barnwood Gloucester
来源：
Strength, Fracture and Complexity | 2015年 / 9卷 / 01期
关键词：
crack growth; creep; Ductile tearing;
D O I：
10.3233/SFC-150178
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
This paper proposes that the combined effects of ductile tearing and creep crack growth may be assessed by simple linear addition of the separately assessed crack growth components. Some limited comparisons with experimental data are made using results from compact tension tests on austenitic Type 316H stainless steel. It is demonstrated that experimental creep crack growth data can be misinterpreted if the data are not corrected for both ductile tearing and plastic displacement. However, these two effects tend to balance each other so that it is preferable to correct for neither rather than for only one factor. Alternatively, it is shown that the time dependent failure assessment diagram approach for creep crack growth can automatically handle tearing-creep interactions by a suitable definition of toughness which does not separate tearing from creep crack growth or plastic displacement from creep displacement. © 2015 - IOS Press and the authors. All rights reserved.
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收藏
页码：43 / 59
页数：16
相关论文
共 31 条
  • [11] Birkett R.P., Wardle G., France C.C., Load-history Effects on Ductile Tearing, (1996)
  • [12] Needleman A., Tvergaard V., An analysis of ductile rupture modes at a crack tip, J. Mech. Phys. Solids, 35, pp. 151-183, (1987)
  • [13] Rousselier G., Ductile fracture models and their potential in local approach of fracture, Nucl. Eng. Design, 105, pp. 97-111, (1987)
  • [14] Oh C.-K., Kim Y.-J., Baek J.-H., Kim W.-S., Development of stress-modified fracture strain for ductile failure of API X65 steel, Int. J. Fract., 143, pp. 119-133, (2007)
  • [15] Oh C.-S., Kim N.-H., Kim Y.-J., Baek J.-H., Kim Y.-P., Kim W.-S., A finite element ductile failure simulation method using stress-modified fracture strain model, Eng. Fract. Mech., 78, 2011, pp. 124-137
  • [16] Spindler M.W., The prediction of creep damage in Type 347 weld metal, Part I: The determination of material properties from creep and tensile tests, Int. J. Pres. Ves. Piping, 82, pp. 175-184, (2005)
  • [17] Spindler M.W., The prediction of creep damage in Type 347 weld metal: Part II creep fatigue tests, Int. J. Pres. Ves. Piping, 82, pp. 185-194, (2005)
  • [18] Nikbin K.M., Smith D.J., Webster G.A., Prediction of creep crack growth from uniaxial creep data, Proc. Roy. Soc. Series A, 396, 1810, pp. 183-197, (1984)
  • [19] Webster G.A., Ainsworth R.A., High Temperature Component Life Assessment, (1994)
  • [20] Oh C.-S., Kim N.-H., Kim Y.-J., Davies C., Nikbin K., Dean D., Creep failure simulations of 316H at 550C: Part 1 - A method and validation, Eng. Fract. Mech., 78, 2011, pp. 2966-2977
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