Effect of the Welding Heat Input on Residual Stresses in Butt-Weld of High-Speed Train

Zhong Yin Zhu; Peng Chen; Hong Mei Zhou; Yong Hui Zhu; Yong Hong Chen; Hao Xu; Ai Qin Tian

doi:10.4028/www.scientific.net/AMR.337.255

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 337Effect of the Welding Heat Input on Residual...

Effect of the Welding Heat Input on Residual Stresses in Butt-Weld of High-Speed Train

Abstract:

Abstract. This study used finite element software SYSWELD to analyze residual stresses in butt-weld between underframe and side wall of high-speed train car body. Based on the thermal-elastic-plastic theory, double ellipsoid heat source model is adopted to simulate the residual stresses under different heat input in the welded joints between underframe and side wall. The residual stresses at the surface of weld specimen were measured experimentally by using the hole-drilling method. The results of the ﬁnite element analysis were compared with experimentally measured data to evaluate the accuracy of the ﬁnite element modeling. Based on this study, a modelling procedure with reasonable accuracy was developed. The developed ﬁnite element modelling was used to study the effects of welding heat input on magnitude and distribution of welding residual stresses in butt-weld of high-speed train car body made of A6N01-T5. The results show the maximum residual stress exists in the welded seam and the adjacent-weld zone, and the residual stress value decreases gradually while the zone is farther from the weld center .Besides, With the increase of the welding heat input, the residual stress value increases gradually.

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Periodical:

Advanced Materials Research (Volume 337)

Pages:

255-261

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.337.255

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Online since:

September 2011

Authors:

Zhong Yin Zhu, Peng Chen, Hong Mei Zhou, Yong Hui Zhu, Yong Hong Chen, Hao Xu, Ai Qin Tian

Keywords:

Elastic-Plastic Analysis, Heat Input, Residual Stress, SYSWELD

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References

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