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TECHNICAL PAPERS

Damage Mechanics Considerations for Life Extension of High-Temperature Components

[+] Author and Article Information
Xiang Ling, Shan-Tung Tu, Jian-Ming Gong

Department of Mechanical Engineering, Nanjing University of Chemical Technology, Nanjing 210009, People’s Republic of China

J. Pressure Vessel Technol 122(2), 174-179 (Dec 15, 1999) (6 pages) doi:10.1115/1.556167 History: Received June 17, 1999; Revised December 15, 1999
Copyright © 2000 by ASME
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References

Viswanathan, R., 1989, “Damage Mechanism and Life Assessment of High Temperature Components,” ASM, NY.
Tu,  S. T., and Dai,  S. H., 1996, “Life Assessment Techniques for Process Equipment at High Temperature,” Pressure Vessel Technology (in Chinese), 13, pp. 61–68.
Liu, Y., 1990, “A Localized Creep Damage Theory and Its Application to Creep Crack Growth,” Ph.D. thesis, Southwestern Jiaotong University, Chengdu, China.
Tu, S. T., and Yang, W. B., 1988, “A Study of Crack Interacting Behavior by the Optical Methods Based on the Edge Dislocation Model,” Proc., Int. Conf. On Advanced Exper. Mech., Tianjing, China, pp. 142–147.
Cormenu,  I., 1975, “Numerical Stability in Quasi-static Elasto/Visco-Plasticity,” Int. J. Num. Mech. Engng., 9, pp. 109.
Hayhurst,  D. R., Dimmer,  P. R., and Morrison,  G. J., 1984, “Development of Continuum Damage in the Creep Rupture of Notched Bars,” Trans. R. Soc. London, 311, pp. 103–129.
Tu, S. T., Segle P., and Samuelsson, L. A., 1993, “Some Aspects of Design of Welded Structures Subjected to High Temperature Creep,” High Temperature Service and Time Dependent Failure, R. W. Swindeman and Y. Asada, eds., ASME PVP., Vol. 262 , pp. 27–34.
Peter,  S., Tu,  S. T., Storesund,  J., and Samuelsson,  L. A., 1996, “Some Issues in Life Assessment of Longitudinal Seam Welds Based on Creep Tests with Cross-Weld Specimens,” Int. J. Pressure Vessels Piping, 66, pp. 199–222.
Tu,  S. T., Wu,  R., and Sandstrom,  R., 1994, “Design Against Creep Failure for Weldments in 0.5Cr0.5Mo0.25V Pipe,” Int. J. Pressure Vessels Piping, 66, pp. 171–186.
Le May,  I., Da Silveria,  T. C., and Vianma,  C., 1996, Int. J. Pressure Vessels Piping, 66, pp. 233–241.
Ling,  X., , 1996, Pressure Vessel Technology (in Chinese), 13, pp. 407–411.

Figures

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Two-bar system—(a) a two-bar structure, (b) FEM mesh
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Stress redistribution in the two-bar structure
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Damage development before and after the replacement of bar 1 (L2/L1=5)
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Life extension efficient versus repair time
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The steady stress distribution across the wall at the knuckle
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Damage distribution along the thickness of cylinder at t=tr
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Relative creep exhaustion in a weldment
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Damage distribution and effective temperature of the tube

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