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Paper IX.1

Assessment of the Use of Finite Element Creep Steady State Stresses for Predicting the Creep Life of Welded Pipes

T.H. Hyde, W. Sun and A.A. Becker

Department of Mechanical Engineering, University of Nottingham, United Kingdom

doi:10.4203/ccp.54.9.1

T.H. Hyde, W. Sun, A.A. Becker, "Assessment of the Use of Finite Element Creep Steady State Stresses for Predicting the Creep Life of Welded Pipes", in B.H.V. Topping, (Editor), "Advances in Finite Element Procedures and Techniques", Civil-Comp Press, Edinburgh, UK, pp 247-251, 1998. doi:10.4203/ccp.54.9.1

Abstract

Finite element results have been obtained using continuum damage and Norton law material constants for the base, HAZ and weld materials of a service-exposed weldment (0.5Cr-0.5Mo-0.25V:2.25Cr-1Mo). The failure times of a typical main steam pipe, obtained from damage mechanics analyses have been used as the basis for assessing the accuracy of failure predictions based on stationary-state stresses obtained using the Norton law material constants. The initiation sites for failure are accurately predicted using the stationary state stresses and for the particular set of material constants used. The failure predictions are conservative, underestimating failure times by about 40%.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 54 ADVANCES IN FINITE ELEMENT PROCEDURES AND TECHNIQUES Edited by: B.H.V. Topping Paper IX.1 Assessment of the Use of Finite Element Creep Steady State Stresses for Predicting the Creep Life of Welded Pipes T.H. Hyde, W. Sun and A.A. Becker Department of Mechanical Engineering, University of Nottingham, United Kingdom doi:10.4203/ccp.54.9.1 purchase the full-text of this paper Full Bibliographic Reference for this paper T.H. Hyde, W. Sun, A.A. Becker, "Assessment of the Use of Finite Element Creep Steady State Stresses for Predicting the Creep Life of Welded Pipes", in B.H.V. Topping, (Editor), "Advances in Finite Element Procedures and Techniques", Civil-Comp Press, Edinburgh, UK, pp 247-251, 1998. doi:10.4203/ccp.54.9.1 Abstract Finite element results have been obtained using continuum damage and Norton law material constants for the base, HAZ and weld materials of a service-exposed weldment (0.5Cr-0.5Mo-0.25V:2.25Cr-1Mo). The failure times of a typical main steam pipe, obtained from damage mechanics analyses have been used as the basis for assessing the accuracy of failure predictions based on stationary-state stresses obtained using the Norton law material constants. The initiation sites for failure are accurately predicted using the stationary state stresses and for the particular set of material constants used. The failure predictions are conservative, underestimating failure times by about 40%. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £75 +P&P)
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