Residual stress distributions as welded and after local postwelding heat treatment (PWHT) of butted weld joint of a huge cylinder with ultra-thick wall were investigated by finite element (FE) simulations and measurement. Sequential coupling thermal-mechanical analyses were conducted with a generalized plane strain two-dimensional (2D) model to simulate the welding procedure bead by bead, combining with three-dimensional (3D) double-ellipsoid moving heat source and mixed isotropic–kinematic hardening plastic model. The simulation was validated by X-ray diffraction (XRD) measurements. Simulation results showed that local PWHT with heated band width of can significantly reduce the residual stress on the outer surface of weld joint, but bring about harmful high tensile stress on inner surface due to bending moment induced by local radial thermal distortion. For the purpose to find out the appropriate heated band width of local PWHT, relations between stress relief and size of heated band were studied. Results show that the stresses on the inner surface reach a maximum value when the heated band width is less than . Based on the simulation results and from the view point of lowering the stress level on the inner surface, the optimum width of 3 for heated band was proposed.
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August 2018
Research-Article
On Residual Stress and Relief for an Ultra-Thick Cylinder Weld Joint Based on Mixed Hardening Model: Numerical and Experimental Studies
Luyang Geng,
Luyang Geng
Key Laboratory of Design and
Manufacture of Extreme Pressure Equipment,
School of Mechanical and Power Engineering,
Nanjing Tech University,
Nanjing 211816, China
e-mail: young@njtech.edu.cn
Manufacture of Extreme Pressure Equipment,
School of Mechanical and Power Engineering,
Nanjing Tech University,
Nanjing 211816, China
e-mail: young@njtech.edu.cn
Search for other works by this author on:
Shan-Tung Tu,
Shan-Tung Tu
Key Laboratory of Pressure Systems and
Safety (MOE),
School of Mechanical and Power Engineering,
East China University of
Science and Technology,
Shanghai 200237, China
e-mail: sttu@ecust.edu.cn
Safety (MOE),
School of Mechanical and Power Engineering,
East China University of
Science and Technology,
Shanghai 200237, China
e-mail: sttu@ecust.edu.cn
Search for other works by this author on:
Jianming Gong,
Jianming Gong
Key Laboratory of Design and
Manufacture of Extreme Pressure Equipment,
School of Mechanical and Power Engineering,
Nanjing Tech University,
Nanjing 211816, China
e-mail: gongjm@njtech.edu.cn
Manufacture of Extreme Pressure Equipment,
School of Mechanical and Power Engineering,
Nanjing Tech University,
Nanjing 211816, China
e-mail: gongjm@njtech.edu.cn
Search for other works by this author on:
Wenchun Jiang,
Wenchun Jiang
State Key Laboratory of Heavy Oil Processing,
College of Chemical Engineering,
China University of Petroleum (East China),
Qingdao 266580, China
e-mail: jiangwenchun@126.com
College of Chemical Engineering,
China University of Petroleum (East China),
Qingdao 266580, China
e-mail: jiangwenchun@126.com
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Wei Zhang
Wei Zhang
Key Laboratory of Design and
Manufacture of Extreme Pressure Equipment,
School of Mechanical and Power Engineering,
Nanjing Tech University,
Nanjing 211816, China
e-mail: hjzhw@njtech.edu.cn
Manufacture of Extreme Pressure Equipment,
School of Mechanical and Power Engineering,
Nanjing Tech University,
Nanjing 211816, China
e-mail: hjzhw@njtech.edu.cn
Search for other works by this author on:
Luyang Geng
Key Laboratory of Design and
Manufacture of Extreme Pressure Equipment,
School of Mechanical and Power Engineering,
Nanjing Tech University,
Nanjing 211816, China
e-mail: young@njtech.edu.cn
Manufacture of Extreme Pressure Equipment,
School of Mechanical and Power Engineering,
Nanjing Tech University,
Nanjing 211816, China
e-mail: young@njtech.edu.cn
Shan-Tung Tu
Key Laboratory of Pressure Systems and
Safety (MOE),
School of Mechanical and Power Engineering,
East China University of
Science and Technology,
Shanghai 200237, China
e-mail: sttu@ecust.edu.cn
Safety (MOE),
School of Mechanical and Power Engineering,
East China University of
Science and Technology,
Shanghai 200237, China
e-mail: sttu@ecust.edu.cn
Jianming Gong
Key Laboratory of Design and
Manufacture of Extreme Pressure Equipment,
School of Mechanical and Power Engineering,
Nanjing Tech University,
Nanjing 211816, China
e-mail: gongjm@njtech.edu.cn
Manufacture of Extreme Pressure Equipment,
School of Mechanical and Power Engineering,
Nanjing Tech University,
Nanjing 211816, China
e-mail: gongjm@njtech.edu.cn
Wenchun Jiang
State Key Laboratory of Heavy Oil Processing,
College of Chemical Engineering,
China University of Petroleum (East China),
Qingdao 266580, China
e-mail: jiangwenchun@126.com
College of Chemical Engineering,
China University of Petroleum (East China),
Qingdao 266580, China
e-mail: jiangwenchun@126.com
Wei Zhang
Key Laboratory of Design and
Manufacture of Extreme Pressure Equipment,
School of Mechanical and Power Engineering,
Nanjing Tech University,
Nanjing 211816, China
e-mail: hjzhw@njtech.edu.cn
Manufacture of Extreme Pressure Equipment,
School of Mechanical and Power Engineering,
Nanjing Tech University,
Nanjing 211816, China
e-mail: hjzhw@njtech.edu.cn
1Corresponding author.
Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received September 5, 2017; final manuscript received May 13, 2018; published online June 18, 2018. Assoc. Editor: San Iyer.
J. Pressure Vessel Technol. Aug 2018, 140(4): 041405 (9 pages)
Published Online: June 18, 2018
Article history
Received:
September 5, 2017
Revised:
May 13, 2018
Citation
Geng, L., Tu, S., Gong, J., Jiang, W., and Zhang, W. (June 18, 2018). "On Residual Stress and Relief for an Ultra-Thick Cylinder Weld Joint Based on Mixed Hardening Model: Numerical and Experimental Studies." ASME. J. Pressure Vessel Technol. August 2018; 140(4): 041405. https://doi.org/10.1115/1.4040315
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