Journal of Mechanical Science and Technology

  • 제18권12호
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  • Pages.2158-2173
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  • 2004
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  • 1738-494X(pISSN)
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  • 1976-3824(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지

Development of Cleavage Fracture Toughness Locus Considering Constraint Effects

  • Chang, Yoon-Suk (SAFE Research Centre, School of Mechanical Engineering, Sungkyunkwan University) ;
  • Kim, Young-Jin (SAFE Research Centre, School of Mechanical Engineering, Sungkyunkwan University) ;
  • Ludwig Stumpfrock (Staatliche Materialprufungsanstalt, Universitat Stuttgart)
  • 발행 : 2004.12.01
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초록

In this paper, the higher order terms in the crack tip stress fields are investigated macroscopically for more realistic assessment of structural material behaviors. For reactor pressure vessel material of A533B ferritic steel, effects of crack size and temperature have been evaluated using 3-point SENB specimens through a series of finite element analyses, tensile tests and fracture toughness tests. The T-stress, Q-parameter and q-parameter as well as the K and J-integral are calculated and mutual relationships are investigated also. Based on the evaluation, it has proven that the effect of crack size from standard length (a/W=0.53) to shallow length (a/W=0.11) is remarkable whilst the effect of temperature from -20$^{\circ}C$ to -60$^{\circ}C$ is negligible. Finally, the cleavage fracture toughness loci as a function of the promising Q-parameter or q-parameter are developed using specific test results as well as finite element analysis results, which can be applicable for structural integrity evaluation considering constraint effects.

키워드

참고문헌

  1. ASTM, 1999, 'Standard Test Method for Measurement of Fracture Toughness,' ASTM E1820-99, pp. 972-1005
  2. Al-Ani, A. M. and Hancock, J. W., 1991, 'J-Dominance of Short Cracks in Tension and Bending,' J. of the Mechanics and Physics of Solids, Vol. 39, No. 1, pp. 23-43 https://doi.org/10.1016/0022-5096(91)90029-N
  3. Anderson, T. L., 1995, 'Fracture Mechanics-Fundamentals and Application,' CRC Press
  4. Betegon, C. and Hancock, J. W., 1991, 'Two Parameter Characterization of Elastic-Plastic Crack Tip Fields,' J. of Applied Mechanics, Vol. 58, pp.104-110 https://doi.org/10.1115/1.2897135
  5. Bilby, B. A. et al., 1986, 'A Finite Element Investigation of the Effect of Specimen Geometry on the Fields of Stress and Strain at the Tips of Stationary Cracks,' Size Effects in Fracture, Institute of Mechanical Engineers, pp. 37-46
  6. Clausmeyer, H., Kussmaul, K. and Roos, E., 1991, 'Influence of Stress State on the Failure Behaviour of Cracked Components Made of Steel,' J. of Applied Mechanics, Vol. 44, No. 2, pp. 77-92 https://doi.org/10.1115/1.3119495
  7. Dodds, R. H. Jr. and Shih, C. F., 1992, 'Continuum and Micro-Mechanics Treatment of Constraint in Fracture,' IAEA/CSNI Specialist's Meeting on Fracture Mechanics Verification by Large Scale Testing
  8. HKS, ABAQUS Version 5.8 & Version 6.2
  9. Hancock, J. W. et al., 1993, 'Constraint and Toughness Parameterized by T,' Constraint Effects in Fracture, ASTM STP 1171, pp. 21-40
  10. Hutchinson, J. W., 1968, 'Singular Behavior at the End of a Tensile Crack Tip in a Hardening Material,' J. of the Mechanics and Physics of Solids, Vol. 16, pp. 13-31 https://doi.org/10.1016/0022-5096(68)90014-8
  11. Jeon, I. S., Lee, Y. W. and Im, S. Y., 2003, 'Higher Order Eigenfields in Mode II Cracks Under Elastic-Plastic Deformation,' KSME International Journal, Vol. 17, No. 2, pp. 254-268
  12. Kirk, M. T. and Dodds, R. H. Jr., 1993, 'Approximate Techniques for Predicting Size Effects on Cleavage Fracture Toughness ($J_c$),' NUREG/CR-5970
  13. Kirk, M. T., Koppenhoefer, K. C. and Shih, C. F., 1993, 'Effect of Constraint on Specimen Dimensions Needed to Obtain Structurally Relevant Toughness Measures,' Constraint Effects in Fracture, ASTM STP 1171, pp. 79-103
  14. Leevers, P. S. and Radon, J. C., 1982, 'Inherent Stress Biaxiality in Various Fracture Specimen Geometries,' Int. J. of Fracture, Vol. 19, pp. 311-325 https://doi.org/10.1007/BF00012486
  15. McMeeking, R. M. and Parks, D. M., 1989, 'Numerical Calculations for Problems of Ductile Fracture,' Advances in Fracture Research, Vol. 3, pp. 1971-1998
  16. O'Dowd, N. P. and Shih, C. F., 1991, 'Family of Crack-Tip Fields Characterized by a Triaxiality Parameter-I : Structure of Fields,' J. of the Mechanics and Physics of Solids, Vol. 39, No. 8, pp. 989-1015 https://doi.org/10.1016/0022-5096(91)90049-T
  17. O'Dowd, N. P. and Shih, C. F., 1992, 'Family of Crack-Tip Fields Characterized by a Triaxiality Parameter-II : Fracture Applications,' J. of the Mechanics and Physics of Solids, Vol. 40, No. 5, pp. 939-963 https://doi.org/10.1016/0022-5096(92)90057-9
  18. O'Dowd, N. P. and Shih, C. F., 1992, 'Two-Parameter Fracture Mechanics : Theory and Applications,' ASTM 24th National Symposium on Fracture Mechanics
  19. O'Dowd, N. P. Shih, C. F. and Dodds, R. H. Jr., 1995, 'The Role of Geometry and Crack Growth on Constraint and Implications for Ductile/Brittle Fracture,' Constraint Effects in Fracture, ASTM STP 1244, pp. 134-458
  20. Pavankumar, T. V., Seidenfuss, M., Eisele, U. and Roos, E., 2001, 'Investigation of Crack-tip Constraint Conditions in Precracked Charpy and Compact Tension Specimens,' MPA internal report
  21. Rice, J. R. and Rosengren, G. F., 1968,'Plane Strain Deformation Near a Crack-tip in a Power Law Hardening Material,' Journal of the Mechanics and Physics of Solids, Vol. 16, pp. 1-12 https://doi.org/10.1016/0022-5096(68)90013-6
  22. Shih, C. F., O'Dowd, N. P. and Kirk, M. T., 1991, 'A Framework for Quantifying Crack Tip Constraint,' ASTM Symposium on Constraint Effects in Fracture, Indianapolis
  23. Sumpter, J. D. G., 1993, 'An Experimental Investigation of the T Stress Approach,' Constraint Effects in Fracture, ASTM STP 1171, pp. 492-502
  24. Varias, A. G., Suo, Z. and Shih, C. F., 1991, 'Ductile Failure of A Constrained Metal Foil,' J. of the Mechanics and Physics of Solids, Vol. 39, No. 7, pp. 963-986 https://doi.org/10.1016/0022-5096(91)90014-F
  25. Williams, M. L., 1957, 'On the Stress Distribution at the Base of a Stationary Crack,' J. of Applied Mechanics, Vol. 24, pp. 109-114