PREDICTION OF RESIDUAL STRESSES IN ARC WELDING OF INCOLOY 800H PIPES

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PURMOHAMAD H.; KERMANPUR A.; SHAMANIAN M.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Paper Information

Journal: JOURNAL OF COMPUTATIONAL METHODS IN ENGINEERING (ESTEGHLAL) Year:2010 | Volume:29 | Issue:1 Page(s): 39-57

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Title

PREDICTION OF RESIDUAL STRESSES IN ARC WELDING OF INCOLOY 800H PIPES

Author(s)

PURMOHAMAD H. | KERMANPUR A. | SHAMANIAN M. | Issue Writer Certificate

Keywords

NUMERICAL SIMULATIONQ2

FINITE ELEMENT METHODQ2

GTAW PROCESSQ3

HOLE DRILLING METHODQ3

INCOLOY 800HQ3

Abstract

In this investigation, the thermal and residual stresess distributions developed during the circumferential butt tungsten arc welding (GTAW) of INCOLOY 800H pipes were simulated using the FINITE ELEMENT METHOD. A coupled thermostructural model was developed in three dimensions using ANSYS software. A subroutine based on the Goldak model was added to the model to simulate the distribution of arc heat source. The plastic behaviour of the material was described by Von-Mises yield function and the bilinear kinematics hardening in the mechanical part of the model, which is sequentially coupled with the thermal one. In order to validate the coupled model, temperature distributions during welding and residual stresses distributions in the welded pipes were both measured using thermocouples and HOLE DRILLING METHOD, respectively. Using this model, a process parameter study was performed for the process variables such as welding efficiency and the amount of heat input in each pass.The results showed a tension-compression distribution of the axial stresses through thickness from inside to outside surface of the pipe and a tensile distribution for the hoop stresses. Increasing the heat input by 36% increased the axial residual stresses along the weld centerline on the inner surface of pipe to 11%. The present simulation model is able to predict distributions of temperature and residual stresses during the GTAW PROCESS with a reasonable precision.

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APA: Copy

PURMOHAMAD, H., KERMANPUR, A., & SHAMANIAN, M.. (2010). PREDICTION OF RESIDUAL STRESSES IN ARC WELDING OF INCOLOY 800H PIPES. JOURNAL OF COMPUTATIONAL METHODS IN ENGINEERING (ESTEGHLAL), 29(1), 39-57. SID. https://sid.ir/paper/173655/en

Vancouver: Copy

PURMOHAMAD H., KERMANPUR A., SHAMANIAN M.. PREDICTION OF RESIDUAL STRESSES IN ARC WELDING OF INCOLOY 800H PIPES. JOURNAL OF COMPUTATIONAL METHODS IN ENGINEERING (ESTEGHLAL)[Internet]. 2010;29(1):39-57. Available from: https://sid.ir/paper/173655/en

IEEE: Copy

H. PURMOHAMAD, A. KERMANPUR, and M. SHAMANIAN, “PREDICTION OF RESIDUAL STRESSES IN ARC WELDING OF INCOLOY 800H PIPES,” JOURNAL OF COMPUTATIONAL METHODS IN ENGINEERING (ESTEGHLAL), vol. 29, no. 1, pp. 39–57, 2010, [Online]. Available: https://sid.ir/paper/173655/en

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