Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 112-125 |
| Number of pages | 14 |
| Journal | International Journal of Fatigue |
| Volume | 55 |
| DOIs | |
| Publication status | Published - Oct 2013 |
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Keywords
- creep
- parametric study
- weldment
- damage
- finite element analysis
- FSRF
- low-cycle fatigue
- creep-fatigue strength
- welded joints
- linear matching method
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A parametric study on creep-fatigue strength of welded joints using the linear matching method. / Gorash, Yevgen; Chen, Haofeng.
In: International Journal of Fatigue, Vol. 55, 10.2013, p. 112-125.Research output: Contribution to journal › Article
TY - JOUR
T1 - A parametric study on creep-fatigue strength of welded joints using the linear matching method
AU - Gorash, Yevgen
AU - Chen, Haofeng
PY - 2013/10
Y1 - 2013/10
N2 - This paper presents a parametric study on creep-fatigue strength of the steel AISI type 316N(L) weldments of types 1 and 2 according to R5 Vol. 2/3 Procedure classification at 550◦C. The study is implemented using the Linear Matching Method (LMM) and is based upon a latest developed creep-fatigue evaluation procedure considering time fraction rule for creep-damage assessment. Parametric models of geometry and FE-meshes for both types of weldments are developed in this way, which allows variation of parameters governing shape of the weld profile and loading conditions. Five configurations, characterised by individual sets of parameters, and presenting different fabrication cases, are proposed. For each configuration, the total number of cycles to failure N⋆ in creep-fatigue conditions is assessed numerically for different loading cases including normalised bending moment M and dwell period t. The obtained set of N⋆ is extrapolated by the analytic function, which is dependent on M, t and geometrical parameters (α and β). Proposed function for N⋆ shows good agreement with numerical results obtained by the LMM. Thus, it is used for the identification of Fatigue Strength Reduction Factors (FSRFs) intended for design purposes and dependent on t, α, β.
AB - This paper presents a parametric study on creep-fatigue strength of the steel AISI type 316N(L) weldments of types 1 and 2 according to R5 Vol. 2/3 Procedure classification at 550◦C. The study is implemented using the Linear Matching Method (LMM) and is based upon a latest developed creep-fatigue evaluation procedure considering time fraction rule for creep-damage assessment. Parametric models of geometry and FE-meshes for both types of weldments are developed in this way, which allows variation of parameters governing shape of the weld profile and loading conditions. Five configurations, characterised by individual sets of parameters, and presenting different fabrication cases, are proposed. For each configuration, the total number of cycles to failure N⋆ in creep-fatigue conditions is assessed numerically for different loading cases including normalised bending moment M and dwell period t. The obtained set of N⋆ is extrapolated by the analytic function, which is dependent on M, t and geometrical parameters (α and β). Proposed function for N⋆ shows good agreement with numerical results obtained by the LMM. Thus, it is used for the identification of Fatigue Strength Reduction Factors (FSRFs) intended for design purposes and dependent on t, α, β.
KW - creep
KW - parametric study
KW - weldment
KW - damage
KW - finite element analysis
KW - FSRF
KW - low-cycle fatigue
KW - creep-fatigue strength
KW - welded joints
KW - linear matching method
U2 - 10.1016/j.ijfatigue.2013.06.011
DO - 10.1016/j.ijfatigue.2013.06.011
M3 - Article
VL - 55
SP - 112
EP - 125
JO - International Journal of Fatigue
JF - International Journal of Fatigue
SN - 0142-1123
ER -