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TECHNICAL PAPERS

The Application of Physically Based CDM Modeling in Prediction of Materials Properties and Component Lifetime

[+] Author and Article Information
J. Yang, J. S. Hsiao, M. Fong, T. B. Gibbons

Power Plant Laboratories, ALSTOM Power Inc., Windsor, CT 06095

J. Pressure Vessel Technol 126(3), 369-375 (Aug 18, 2004) (7 pages) doi:10.1115/1.1767178 History: Received April 26, 2002; Revised December 18, 2003; Online August 18, 2004
Copyright © 2004 by ASME
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References

Larson,  F. R., and Miller,  I., 1952, “A Time Temperature Relationship for Rupture and Creep Stresses,” Trans. ASME, 74, p. 765.
Evans, R. W., Parker, J. D., and Wilshire, B., 1982, “An Extrapolation Procedure for Long-Term Creep Strain and Creep Life Prediction with Special Reference to 12 Cr12 Mo14 V Ferritic Steels,” in Recent Advances in Creep and Fracture of Engineering Materials and Structures, B. Wilshire and D. R. J. Owen, eds., Pineridge Press, Swansea, UK, pp. 135–184.
Kachanov,  L. M., 1958, “On the Time of the Rapture Process Under Creep Conditions,” Izv. Akad. Nauk SSSR, Ser. Fiz., (8), pp. 26–31.
Rabotnov, Y. N., 1968, “Creep Rapture” in Proc. XII IUTAM Congress, Stamford, CT, Hetenyi and Vincent, eds., Springer, p. 137.
Ashby, M. F., and Dyson, B. F., 1984, “Creep Damage Mechanics and Mechanisms” Advances in Fracture Research, S. R. Valluri et al., eds., Pergamon Press, 1 , pp. 3–30.
Dyson,  B. F., 1988, “Creep and Fracture of Metals: Mechanisms and Mechanics,” Revue Phys App, 23, pp. 605–613.
Dyson,  B. F., 2000, “Use of CDM in Materials Modeling and Component Life-Prediction,” ASME J. Pressure Vessel Technology, 122, pp. 281–296.
Robinson,  E. L., 1952, “Effect of Temperature Variation on the Long Term Rupture Strength of Steels,” Trans. ASME, 74, p. 777.
Prager, M., 2000, “The Omega Method—An Engineering Approach to Life Assessment,” ASME Pressure Vessel Technology, 122 , pp. 273–280.
Penny, R. K., and Marriott, D. L., 1995, Design for Creep, Chapman and Hall, London, UK.
Hayhurst,  D. R., 1994, “The Use of Continuum Damage Mechanics in Creep Analysis for Design,” Journal of Strain Analysis., 3, pp. 233–241.
Dyson,  B. F., and Gibbons,  T. B., 1987, “Tertiary Creep in Nickel-Base Superalloys: Analysis of Experimental Data and Theoretical Synthesis,” Acta Metall., 35, pp. 2355–2369.
Nelder,  J. L., and Mead,  R., 1965, “A Simpler Method for Function Minimisation,” Computer J., 7, pp. 308–333.
Dyson,  B. F., 1995, “Mechanical Testing of High Temperature Materials: Modelling Data-Scatter,” Phil. Trans., Royal Society, London, A351, pp. 579–594.
Ennis, P. D., unpublished work at KFA Julich, Germany.
Othman,  A. M., Dyson,  B. F., Hayhurst,  D. R., and Lin,  J., 1994, “Continuum Damage Mechanics Modelling of Circumferentially Notched Tension Bars Undergoing Tertiary Creep with Physically-Based Constitutive Equations,” Acta. Metall. Mater., 42, pp. 597–611.
Hsiao,  J.-S., and Chung,  B. T. F., 1986, “An Efficient Algorithm for Finite Element Solutions to Two-Dimensional Heat Transfer with Melting and Freezing,” ASME J. Heat Transfer, 108, pp. 462–464.
Hsiao, J-S., Fong, M., and Gibbons, T. B., 1995, “An Efficient Method for Creep Failure Analysis Using Continuum Damage Mechanics,” Computational Mechanics’95, Proc. Int. Conf. on Computational Engineering Science, S. N. Atluri, G. Yagawa, and T. A. Cruise, eds., Springer-Verlag, Berlin, 2 , pp. 797–1802.

Figures

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Examples of creep curves predicted using CDM with experimental data for comparison: (a) HCM12A at 600°C and 185 MPa; and (b) NF616 simulated HAZ at 612°C and 120 MPa.
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Predicted scatterband for T22 at 600°C with experimental data; symbols represent different casts.
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Strain time trajectory for creep test with stress change showing good correlation between predicted (dashed line) and experimental values; HCM12A at 600°C.
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Predicted stress-rupture life at 600°C for welded testpieces of HCM12A (solid line) along with test data for comparison
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Mesh configurations used in FE analysis of model components: (a) internally notched tube; (b) externally notched tube; (c) and (d) blunt-notch testpieces.
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Life to rupture as a function of stress for two designs of blunt-notch testpieces of HCM12A tested at 600°C
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Output showing strain (i.e. damage) accumulation for plain tube with 10 percent eccentricity immediately prior to failure. Darkest shading represents failed elements and predicted failure profile is similar to that of the failed component.
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Creep strain (a), von Mises stress (b) and macrosection (c), showing failure profile for externally-notched tube. Dotted lines in (c) show initial (inner lines) and final (outer lines) profiles predicted by the model.
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Creep strain (a), von Mises stress (b), and macrosection (c) showing failure profile for internally-notched tube. Dotted lines in (c) show initial and final profiles predicted by the model.

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