Finite Element Analysis and In-Situ Measurement of Out-of-Plane Distortion in Thin Plate TIG Welding

Huang, Hui; Yin, Xianqing; Feng, Zhili; Ma, Ninshu

doi:10.3390/ma12010141

Title: Finite Element Analysis and In-Situ Measurement of Out-of-Plane Distortion in Thin Plate TIG Welding

Journal Article · Thu Jan 03 00:00:00 EST 2019 · Materials

DOI:https://doi.org/10.3390/ma12010141· OSTI ID:1489600

^[1]; Yin, Xianqing ^[2];

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Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Osaka Univ., Osaka (Japan)
Xi'an Jiaotong Univ., Xi'an (China)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Osaka Univ., Osaka (Japan)

Transient distortion of thin plate in the welding process usually has a complicated mode and large magnitude. Quantitative measurement and prediction of full-field distortion are challenging and rarely reported up to now. In this study, the out-of-plane distortion of a thin plate during the Tungsten Inert Gas (TIG) welding process was measured using the digital image correlation (DIC) method. A simulation model based on thermal elastic–plastic finite element method (FEM) and DIC measured geometric imperfection were developed for accurate prediction of the transient welding distortion. The numerical results and experimental data agreed very well in both out-of-plane deformation modes and magnitudes of the plate at different stages of welding. The maximum out-of-plane distortion was larger than 4 mm during welding which can cause instability of arc length and heat input. The distance change between welding torch and plate surface was investigated under different initial deflections of the plate before welding. The plate with flat geometry shows the minimum transient and final gap change. In addition, the relationship between heat input and welding distortion was clarified through a series of numerical analyses. As a result, optimization of welding heat input can be performed based on numerical results to avoid excessive welding distortion.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1489600

Journal Information:: Materials, Vol. 12, Issue 1; ISSN 1996-1944

Publisher:: MDPICopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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