Volume 19, Issue 1 (January 2019)                   Modares Mechanical Engineering 2019, 19(1): 223-228 | Back to browse issues page

XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Sabokrouh M, Farahani M. Simulation of the Residual Stresses Distribution in Girth Weld of Gas Transmission Pipeline. Modares Mechanical Engineering 2019; 19 (1) :223-228
URL: http://mme.modares.ac.ir/article-15-21131-en.html
1- Mechanical Engineering School, North Kargar Avenue, Tehran, Iran. Postal Code: 1439957131 , mrfarahani@ut.ac.ir
Abstract:   (3459 Views)
The weld residual stresses decrease the design stress in gas transportation pipelines. In this paper, two X70 steel pipes of 56 inch outside diameter were firstly girth welded. Experimental hole drilling test was conducted to evaluate the residual stress distribution in this joint. Then, the finite element simulation of the welding process was performed to evaluate the residual stress distribution precisely. The numerical results were verified by comparison with the obtained experimental measurements. The qualitative results achieved match properly with the experimental results. Simulation results (with a difference about 15% compared to experimental results) evaluated the maximum residual stress in hoop direction of pipe’s external weld metal. The experimental data showed that the maximum tensile residual stress was located on the center line of the weld gap on the pipe outer surface alongside with the pipe hoop direction. Moreover, the maximum compressive (hoop and axial) residual stresses occurred on the pipe inner surface in heat affected zone. The variations of the hoop residual stresses on the inner and outer surfaces of the pipe had similar trend with tensile distribution at the center line of the weld gap. However, these stresses showed different trends (tensile stress on the outer surface, and compressive stress on the inner surface) with distancing from the weld center line.
Full-Text [PDF 549 kb]   (2610 Downloads)    
Article Type: Original Research | Subject: Welding
Received: 2018/05/21 | Accepted: 2018/10/23 | Published: 2019/01/1

References
1. Hashemi SH, Mohamaadyani D. Characterisation of weldment hardness, impact energy and microstructure in API X65 steel. International Journal of Pressure Vessels and Piping. 2012;98:8-15. [Link] [DOI:10.1016/j.ijpvp.2012.05.011]
2. Hashemi SH, Mohamaadyani D, Pouranvari M, Mousavizadeh SM. On the relation of microstructure and impact toughness characteristics of DSAW steel of grade API X70. Fatigue and Fracture of Engineering Materials & Structures. 2009;32(1):33-40. [Link] [DOI:10.1111/j.1460-2695.2008.01312.x]
3. Leggatt RH. Residual stresses in welded structures. International Journal of Pressure Vessels and Piping. 2008;85(3):141-151. [Link] [DOI:10.1016/j.ijpvp.2007.10.004]
4. Bouchard PJ. Validated residual stress profiles for fracture assessments of stainless steel pipe girth welds. International Journal of Pressure Vessels and Piping. 2007;84(4):195-222. [Link] [DOI:10.1016/j.ijpvp.2006.10.006]
5. Brickstad B, Josefson BL. A parametric study of residual stresses in multi-pass butt-welded stainless steel pipes. International Journal of Pressure Vessels and Piping. 1998;75(1):11-25. [Link] [DOI:10.1016/S0308-0161(97)00117-8]
6. Sabokrouh M, Hashemi SH, Farahani MR. Experimental study of the weld microstructure properties in assembling of natural gas transmission pipelines. Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture. 2017;231(6):1039-1047. [Link] [DOI:10.1177/0954405415579581]
7. Mochizuki M, Hayashi M, Hattori T. Residual stress distribution depending on welding sequence in multi-pass welded joints with X-shaped groove. Journal of Pressure Vessel Technology. 1999;122(1):27-32. [Link] [DOI:10.1115/1.556142]
8. Wen S, Hilton P, Farrugia DCJ. Finite element modelling of a submerged arc welding process. Journal of Materials Processing Technology. 2001;119(1-3):203-209. [Link] [DOI:10.1016/S0924-0136(01)00945-1]
9. Jiang W, Yahiaoui K, Hall F, Laoui T. Finite element simulation of multipass welding: Full three-dimensional versus generalized plane strain or axisymmetric models. The Journal of Strain Analysis for Engineering Design. 2005;40(6):587-597. [Link] [DOI:10.1243/030932405X16061]
10. Jiang W, Yahiaoui K, Hall F. Finite Element Predictions of Temperature Distributions in a Multipass Welded Piping Branch Junction. Journal of Pressure Vessel Technology. 2005;127(1):7-12. [Link] [DOI:10.1115/1.1845450]
11. Mochizuki M, Hayashi M, Hattori T. Numerical Analysis of Welding Residual Stress and Its Verification Using Neutron Diffraction Measurement. Journal of Engineering Materials and Technology. 1999;122(1):98-103. [Link] [DOI:10.1115/1.482772]
12. Fricke S, Keim E, Schmidt J. Numerical weld modeling - a method for calculating weld-induced residual stresses. Nuclear Engineering and Design. 2001;206(2-3):139-150. [Link] [DOI:10.1016/S0029-5493(00)00414-3]
13. Akbari D, Farahani MR, Soltani N. Effects of the weld groove shape and geometry on residual stresses in dissimilar butt-welded pipes. The Journal of Strain Analysis for Engineering Design. 2012;47(2):73-82. [Link] [DOI:10.1177/0309324711434681]
14. Goldak J, Chakravarti A, Bibby M. A new finite element model for welding heat sources. Metallurgical Transactions B. 1984;15(2):299-305. [Link] [DOI:10.1007/BF02667333]
15. ASTM Standard E837-13a. Standard test method for determining residual stresses by the hole-drilling strain-gage method [Internet]. West Conshohocken: ASMT International; 2008 [cited 2018 November 10]. Available from: https://www.astm.org/Standards/E837.htm. [Link]
16. Vishay Precision Group. Measurement of residual stresses by the hole-drilling* strain gage method [Internet]. Wendell NC: Micro-Measurements; 2010 [cited 2018 November 10]. Available from: http://www.vishaypg.com/docs/11053/tn503.pdf [Link]
17. Hakkak Zargar S, Farahani MR, Besharati Givi MK. Numerical and experimental investigation on the effects of submerged arc welding sequence on the residual distortion of the fillet welded plates. Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture. 2016;230(4):654-661. [Link] [DOI:10.1177/0954405414560038]

Add your comments about this article : Your username or Email:
CAPTCHA

Send email to the article author


Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.