철도차량 대차프레임의 용접 및 보수용접의 잔류응력 특성평가
Evaluation of residual stress characteristics of welding and repair welding of boige frame of railway vehicle
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
철도차량의 대차프레임은 25년 이상의 수명을 요구되고, 주행 중에 반복적인 피로하중이 작용하므로 용접부위에서 균열이 발생한다. 균열을 보수하는 방법은 여러 가지가 있지만, 대차프레임의 경우에는 균열을 제거한 후 가스메탈아크용접으로 보수용접을 실시한다. 용접부에서는 잔류응력이 필연적으로 발생하고 이는 피로강도에 커다란 영향을 미치며 재료 및 용접방법에 따라서 달라진다. 본 논문에서는 대차프레임에서 사용하고 있는 재료인 SM490A에 대한 용접 및 보수용접에 대한 잔류응력 특성을 평가하였다. 이를 위하여 용접 및 보수용접에 대한 유한요소해석 절차를 제시하였고, 시험편을 제작하여 이에 대하여 검증하였다. 또한, 후열처리 조건에 따른 잔류응력변화를 유한요해석을 통하여 조사하였다.
Abstract
The bogie frame of a railway vehicle requires a service life of 25 years or more, and because of repeated fatigue loads during operation, cracks occur in the welding part. There are several ways to repair cracks, but in the case of a bogie frame, repair welding is performed by GMAW after removing the cracks. Residual stress inevitably occurs in the weld, which has a great influence on the fatigue strength and varies depending on the material and welding method. In this paper, the residual stress characteristics of SM490A, the material used in the bogie frame, were evaluated for welding and repair welding. For this, finite element analysis procedures for welding and repair welding were presented, and specimens were prepared and tests were performed. In addition, the change of residual stress according to the post weld heat treatment(PWHT) was investigated through F.E. analysis.
참고문헌 (25)
- "EN 13749, (2011), Railway applications - Wheelsets and bogies-Methods of specifying structural requirements of bogie frames", European Committee for Standardization, ~ (2011)
- 서정원, "철도차량 대차프레임의 하중이력 특성분석 및 피로수명평가", 한국도시철도학회논문집, 7(2), pp.297~307 (2019), 한국도시철도학회
- 신익현, "서울도시철도 7호선 신형전동차 대차프레임 구조 안전성 평가 연구", 한국도시철도학회논문집, 2(3), pp.203~208 (2014), 한국도시철도학회
- "KRCS B534, (2017), 전기동차용 대차프레임, 철도공사규격서", ~ (2017)
- "UIC Code 879-13, (1993), Technical specification for the quality control of welded joints on steel rolling stock", International Union of Railways, ~ (1993)
- "KRS RN 0004, (2007), 화차용 용접대차, 한국철도표준규격", ~ (2007)
- P. Dong, "Analysis of residual stress relif mechanisms in post-weld heat treatment", Int. Journal of Pressure Vessels and Piping, 122, pp.6~14 (2014)
- K. A. Venkata, "Study on the effect of post weld heat treatment parameters on the relaxation of welding residual stress in electron beam welded P91steel plates", Procedia Engineering, 86, pp.223~233 (2014)
- A. Mitra, "Influence of temperature and time of post-weld heat treatment on stress relief in an 800-mm-Thick steel weldment", J. of Materials Engineering and Performance, 24(4), pp.1384~1393 (2016)
- P. Dong, "On repair weld residual stress and significance to structural integrity", Welding in the World, 62, pp.351~362 (2018)
- G. Salerno, "Residual stress analysis and finite element modelling of repair welded titanium sheets", Weld World, 61, pp.1211~1223 (2017)
- E. Bonnaud, "Three dimensional weld residual stresses simulations of start", stop and weld repair effects, 2015, pp.130, 531~543
- "KS D 3515, (2018), 용접 구조용 압연강재, 한국산업표준", ~ (2018)
- "KS D 3503, (2018), 일반 구조용 압연강재, 한국산업표준", ~ (2018)
- C. D. Elcoate, "Three dimensional multi-pass repair weld simulations", Int. Journal of pressure vessels and piping, 82(4), pp.244~257 (2005)
- G. Salerno, "Residual stress analysis and finite element modelling of repair-welded titanium sheets", Weld world, 61, pp.1211~1223 (2017)
- "Simufact Welding, Simufact Engineering GmbH, part of Hexagon’s Manufacturing Intelligence division"[URL]
- J. Goldak, "A new finite element model for welding heat source", Metallurgical Transactions B, 15, pp.299~305 (1994)
- M. Andriyshuk, "Numerical simulation from theory to industry – chapter 24 : 3D Finite Element Simulation of T-Joint Fillet Weld:Effect of Various Welding Sequences on the Residual Stresses and Distortions", ~ (2012)
- "Standard UIC 897-13, (1993), Technical specification for the quality control of welded joints on steel rolling stock, International union of railways", ~ (1993)
- G. Gonzalez, "Variation of creep resistance in ferritic steels by a heat treatment", Procedia Materials Science, 9, pp.412~418 (2015)
- A. H. Yaghi, "Finite element simulation of welding and residual stresses in a P91 steel pipe incorporating solid-state phase transformation and post-weld heat treatment", J. Strain analysis, 43, pp.275~293 (2008)
- A. Mita, "Influence of temperature and time of post-weld heat treatment on stress relief in an 800-mm-thick steel weldment", Journal of Materials Engineering and Performance, 25(4), pp.1384~1393 (2016)
- 구병춘, "용접후열처리와 잔류응력이 SM490A의 피로수명에 미치는 영향", 한국철도학회논문집, 22(6), pp.448~455 (2019), 한국철도학회[DOI]
- 구병춘, "용접후열처리가 SM490A 용접부의 미세조직 및 피로강도에 미치는 영향", 한국철도학회논문집, 23(5), pp.407~413 (2020), 한국철도학회[DOI]