Welding is one of the most important joining processes, and the effect of welding residual stresses in a structure has a great deal of influence on its quality. In spite of such a key interest, the analysis of a welding process has not been successful as in a structural analysis. This is partially because welding involves complex phenomena that are manifested by the phase evolution and by thermomechanical processes as well. In the present study, a hypoelasticity-based formulation is applied to welding processes to determine residual deformation and stresses. Algorithmic consistent moduli for elastoplastic deformations including transformation plasticity are also obtained. Leblond’s phase evolution equation, coupled with the energy equation, is employed to calculate the phase volume fraction; this plays an important role as a constitutive parameter reflecting phase fraction effects in a mechanical constitutive equation. Furthermore, transformation plasticity is taken into account for an accurate evaluation of stress. The influence of the phase transformation and the transformation plasticity on residual stress is investigated by means of numerical analyses using metallurgical parameters in Leblond’s phase evolution equation that are adjusted with respect to various cooling rates in a CCT-diagram. Coding implementation is conducted by way of the ABAQUS user subroutines, DFLUX, UEXPAN, and UMAT. The numerical examples demonstrated that the phase transformation and the transformation plasticity have a significant effect on the residual stress of a welded structure.
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e-mail: yousung_han@kaist.ac.kr
e-mail: mech9676@kaist.ac.kr
e-mail: mshan@dsme.co.kr
e-mail: lucky7@hhi.co.kr
e-mail: khchoi76@posco.com
e-mail: sim@kaist.ac.kr
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April 2011
Research Papers
Finite Element Analysis of Welding Processes by Way of Hypoelasticity-Based Formulation
You Sung Han,
You Sung Han
Department of Mechanical Engineering,
e-mail: yousung_han@kaist.ac.kr
KAIST
, Science Town, DaeJeon 305-701, South Korea
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Kyehyung Lee,
Kyehyung Lee
Department of Mechanical Engineering,
e-mail: mech9676@kaist.ac.kr
KAIST
, Science Town, DaeJeon 305-701, South Korea
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Myoung-Soo Han,
Myoung-Soo Han
Industrial Application R&D Institute,
e-mail: mshan@dsme.co.kr
Daewoo Shipbuilding and Marine Eng. Co. Ltd.
, 1 Ajoo-dong, Geoje-si, Gyoungnam 656-220, South Korea
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Hyunchil Chang,
Hyunchil Chang
Department of Machinery Design Research,
e-mail: lucky7@hhi.co.kr
Hyundai Maritime Research Institute
, 1 Jeonha-dong, Dong-gu, Ulsan 682-792, South Korea
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Kanghyouk Choi,
e-mail: khchoi76@posco.com
Kanghyouk Choi
Department of CEM R&E Project
, 700 Gumho-dong, Gwangyang-si, Jeonnam 545-711, South Korea
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Seyoung Im
Seyoung Im
Department of Mechanical Engineering,
e-mail: sim@kaist.ac.kr
KAIST
, Science Town, DaeJeon 305-701, South Korea
Search for other works by this author on:
You Sung Han
Department of Mechanical Engineering,
KAIST
, Science Town, DaeJeon 305-701, South Koreae-mail: yousung_han@kaist.ac.kr
Kyehyung Lee
Department of Mechanical Engineering,
KAIST
, Science Town, DaeJeon 305-701, South Koreae-mail: mech9676@kaist.ac.kr
Myoung-Soo Han
Industrial Application R&D Institute,
Daewoo Shipbuilding and Marine Eng. Co. Ltd.
, 1 Ajoo-dong, Geoje-si, Gyoungnam 656-220, South Koreae-mail: mshan@dsme.co.kr
Hyunchil Chang
Department of Machinery Design Research,
Hyundai Maritime Research Institute
, 1 Jeonha-dong, Dong-gu, Ulsan 682-792, South Koreae-mail: lucky7@hhi.co.kr
Kanghyouk Choi
Department of CEM R&E Project
, 700 Gumho-dong, Gwangyang-si, Jeonnam 545-711, South Koreae-mail: khchoi76@posco.com
Seyoung Im
Department of Mechanical Engineering,
KAIST
, Science Town, DaeJeon 305-701, South Koreae-mail: sim@kaist.ac.kr
J. Eng. Mater. Technol. Apr 2011, 133(2): 021003 (13 pages)
Published Online: March 3, 2011
Article history
Received:
September 16, 2009
Revised:
September 23, 2010
Online:
March 3, 2011
Published:
March 3, 2011
Citation
Han, Y. S., Lee, K., Han, M., Chang, H., Choi, K., and Im, S. (March 3, 2011). "Finite Element Analysis of Welding Processes by Way of Hypoelasticity-Based Formulation." ASME. J. Eng. Mater. Technol. April 2011; 133(2): 021003. https://doi.org/10.1115/1.4003099
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