Effects of geometry and combined loading on steady-state creep stresses in welded branches

Jae Jun Han; Kuk Hee Lee; Yun Jae Kim; Kamran Nikbin; David Dean

doi:10.1016/j.ijpvp.2011.07.002

Effects of geometry and combined loading on steady-state creep stresses in welded branches

Jae Jun Han, Kuk Hee Lee, Yun Jae Kim, Kamran Nikbin, David Dean

School of Mechanical Engineering

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

8 Citations (Scopus)

Abstract

In our previous paper, it was found that the mis-match effect in creep on steady-state stresses within the weld metal for a large bore branch junction could be uniquely quantified by the mis-match factor defined as a function of the creep stress exponent and the ratio of creep constants for the base and weld materials. Furthermore ratios of section-averaged (effective and maximum principal) stresses for the mis-matched case to those for the even-matched case were linearly dependent on the mis-match factor. Above results were obtained for a specific branch geometry under single loading. This paper extends our previous analysis to other branch geometries and to combined loading. It is found that above conclusions can be applied to general branch components under combined loading.

Original language	English
Pages (from-to)	395-402
Number of pages	8
Journal	International Journal of Pressure Vessels and Piping
Volume	88
Issue number	10
DOIs	https://doi.org/10.1016/j.ijpvp.2011.07.002
Publication status	Published - 2011 Oct

Keywords

Creep mis-match
Finite element analysis
Steady-state stresses
Welded branch junctions

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1016/j.ijpvp.2011.07.002

Cite this

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title = "Effects of geometry and combined loading on steady-state creep stresses in welded branches",

abstract = "In our previous paper, it was found that the mis-match effect in creep on steady-state stresses within the weld metal for a large bore branch junction could be uniquely quantified by the mis-match factor defined as a function of the creep stress exponent and the ratio of creep constants for the base and weld materials. Furthermore ratios of section-averaged (effective and maximum principal) stresses for the mis-matched case to those for the even-matched case were linearly dependent on the mis-match factor. Above results were obtained for a specific branch geometry under single loading. This paper extends our previous analysis to other branch geometries and to combined loading. It is found that above conclusions can be applied to general branch components under combined loading.",

keywords = "Creep mis-match, Finite element analysis, Steady-state stresses, Welded branch junctions",

author = "Han, {Jae Jun} and Lee, {Kuk Hee} and Kim, {Yun Jae} and Kamran Nikbin and David Dean",

note = "Funding Information: This research is supported by Basic Atomic Energy Research Institute and Engineering Research Center (No. 2009-0063170 ), funded by Korea Science & Engineering Foundation. This paper is published by permission of British Energy – part of EDF Energy.",

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doi = "10.1016/j.ijpvp.2011.07.002",

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pages = "395--402",

journal = "International Journal of Pressure Vessels and Piping",

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AU - Han, Jae Jun

AU - Lee, Kuk Hee

AU - Kim, Yun Jae

AU - Nikbin, Kamran

AU - Dean, David

N1 - Funding Information: This research is supported by Basic Atomic Energy Research Institute and Engineering Research Center (No. 2009-0063170 ), funded by Korea Science & Engineering Foundation. This paper is published by permission of British Energy – part of EDF Energy.

PY - 2011/10

Y1 - 2011/10

N2 - In our previous paper, it was found that the mis-match effect in creep on steady-state stresses within the weld metal for a large bore branch junction could be uniquely quantified by the mis-match factor defined as a function of the creep stress exponent and the ratio of creep constants for the base and weld materials. Furthermore ratios of section-averaged (effective and maximum principal) stresses for the mis-matched case to those for the even-matched case were linearly dependent on the mis-match factor. Above results were obtained for a specific branch geometry under single loading. This paper extends our previous analysis to other branch geometries and to combined loading. It is found that above conclusions can be applied to general branch components under combined loading.

AB - In our previous paper, it was found that the mis-match effect in creep on steady-state stresses within the weld metal for a large bore branch junction could be uniquely quantified by the mis-match factor defined as a function of the creep stress exponent and the ratio of creep constants for the base and weld materials. Furthermore ratios of section-averaged (effective and maximum principal) stresses for the mis-matched case to those for the even-matched case were linearly dependent on the mis-match factor. Above results were obtained for a specific branch geometry under single loading. This paper extends our previous analysis to other branch geometries and to combined loading. It is found that above conclusions can be applied to general branch components under combined loading.

KW - Creep mis-match

KW - Finite element analysis

KW - Steady-state stresses

KW - Welded branch junctions

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SN - 0308-0161

VL - 88

SP - 395

EP - 402

JO - International Journal of Pressure Vessels and Piping

JF - International Journal of Pressure Vessels and Piping

IS - 10

ER -

Effects of geometry and combined loading on steady-state creep stresses in welded branches

Abstract

Keywords

ASJC Scopus subject areas

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