Study on Residual Stress and Numerical Simulation Technology of Welding to Thick Structure Construction

Ming Li; Ning Li; Yu Liu; Qing Shan Wang

doi:10.4028/www.scientific.net/AMR.676.136

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 676Study on Residual Stress and Numerical Simulation...

Study on Residual Stress and Numerical Simulation Technology of Welding to Thick Structure Construction

Abstract:

In this investigation, a method combined with thermal-elastic-plastic finite element method and thermo-mechanical coupling method is proposed based on equivalence principle, which is used to predict residual deformation of large thick spherical structure after welding. In this solving framework, according the relationship of strain-stress of welding material, equivalent temperature load of single weld is obtained firstly, and then extended to other welds. Thus, the prediction of welding deformation for large thick spherical structure is obtained. Based on numerical analysis, the optimization of welding position is carried out. Then the optimum welding scheme of large thick spherical structure is presented. The numerical simulation in this paper provides theoretical basis for the process of large thick spherical structure. Moreover, it also provides a reliable method to predict the strain of large thick spherical structure.

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Periodical:

Advanced Materials Research (Volume 676)

Pages:

136-140

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.676.136

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Online since:

March 2013

Authors:

Ming Li, Ning Li, Yu Liu, Qing Shan Wang

Keywords:

Numerical Experiment, Spherical Hull Structure, Welding Deformation, Welding Residual Stress, Welding Technique

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References

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