3D FEM Simulation Analysis for the Residual Stress to GTAW Welded Joints Based on Adscititious Magnetic Field

Qi Lin Zhong; Shu Yuan Jiang; Huan Ming Chen; Pin Liu

doi:10.4028/www.scientific.net/AMM.138-139.775

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 138-1393D FEM Simulation Analysis for the Residual Stress...

3D FEM Simulation Analysis for the Residual Stress to GTAW Welded Joints Based on Adscititious Magnetic Field

Abstract:

Aiming at adscititious magnetic field effect GTAW arc, decrease the maximum welding residual which by arc shape be changed, avoid the temperature excessive focus on welding pool, reduce temperature gradient and so on. Arc heat source model of GTAW under the magnetic field was established, also consider physical properties of materials varying with the temperature and the influence transformation, through the method of killing or activating elements treatment such as melting or solidification by welding pool, 3D FEM simulation analysis for the temperature gradient and residual stress size distribution to GTAW welded joints compared to on magnetic field or not. The results show that maximum weld longitudinal residual stress and transverse residual stress were respectively reduced by 12.3% and 13.6% when compared to no magnetic field, also have blind hole measuring method measure welding residual stress, Test measurement and simulation values were basically consistent.

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Periodical:

Applied Mechanics and Materials (Volumes 138-139)

Pages:

775-779

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.138-139.775

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Online since:

November 2011

Authors:

Qi Lin Zhong, Shu Yuan Jiang, Huan Ming Chen, Pin Liu

Keywords:

Adscititious Magnetic Field, FEM Simulation, Welding Residual Stress (WRS)

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