Quantification of stress redistribution due to mismatch in creep properties in welded branch pipes

K. H. Lee; Y. J. Kim; K. B. Yoon; K. Nikbin; D. Dean

doi:10.1111/j.1460-2695.2009.01433.x

Quantification of stress redistribution due to mismatch in creep properties in welded branch pipes

K. H. Lee, Y. J. Kim, K. B. Yoon, K. Nikbin, D. Dean

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

This paper reports steady-state stress distributions within the weld metal in a welded branch component, via detailed three-dimensional elastic-creep finite element analyses. The creep exponent and constants for the base and weld metal are systematically varied to simulate under-matching, even-matching and over-matching conditions in creep. Various loading conditions are also considered to see the effect of the loading mode. It is found that the mismatch effect in creep on steady-state stresses within the weld metal can be uniquely quantified by the mismatch factor, defined as a function of creep exponent and constant. Ratios of section-averaged (effective and maximum principal) stresses for the mismatched case to those for the even-matched case are linearly dependent on the mismatch factor.

Original language	English
Pages (from-to)	238-251
Number of pages	14
Journal	Fatigue and Fracture of Engineering Materials and Structures
Volume	33
Issue number	4
DOIs	https://doi.org/10.1111/j.1460-2695.2009.01433.x
Publication status	Published - 2010 Apr

Keywords

Creep mismatch
Finite element analysis
Steady-state stresses
Welded branch junctions

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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10.1111/j.1460-2695.2009.01433.x

Cite this

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abstract = "This paper reports steady-state stress distributions within the weld metal in a welded branch component, via detailed three-dimensional elastic-creep finite element analyses. The creep exponent and constants for the base and weld metal are systematically varied to simulate under-matching, even-matching and over-matching conditions in creep. Various loading conditions are also considered to see the effect of the loading mode. It is found that the mismatch effect in creep on steady-state stresses within the weld metal can be uniquely quantified by the mismatch factor, defined as a function of creep exponent and constant. Ratios of section-averaged (effective and maximum principal) stresses for the mismatched case to those for the even-matched case are linearly dependent on the mismatch factor.",

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AU - Dean, D.

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AB - This paper reports steady-state stress distributions within the weld metal in a welded branch component, via detailed three-dimensional elastic-creep finite element analyses. The creep exponent and constants for the base and weld metal are systematically varied to simulate under-matching, even-matching and over-matching conditions in creep. Various loading conditions are also considered to see the effect of the loading mode. It is found that the mismatch effect in creep on steady-state stresses within the weld metal can be uniquely quantified by the mismatch factor, defined as a function of creep exponent and constant. Ratios of section-averaged (effective and maximum principal) stresses for the mismatched case to those for the even-matched case are linearly dependent on the mismatch factor.

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Quantification of stress redistribution due to mismatch in creep properties in welded branch pipes

Abstract

Keywords

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