**Author details**

CMM measurement was 0.80750. The quantitative analysis was carried out by extracting the mid-length displacement, as was displayed in **Figure 14**. Taking the weld center as the deformation base point, it can be seen that the computation of z-direction welding displacement considering back-gouging had a better agreement with the measurement. It is analyzed that the deformation after main welding was mitigated by the back-gouging process. Therefore, it can be concluded that the residual stress distribution and magnitude obtained by the efficient TEP FEM con-

In this paper, the welding-induced residual stress in thick plate butt welded joint

1.Both the computed longitudinal residual stresses along weld width and throughthickness residual stresses are in a good agreement with the CM measured results.

2.Considering the back-gouging, the computed welding displacement through

3.Through the comparison analysis of measurement and computation, the backgouging has an insignificant effect on welding residual stress distribution and

The authors gratefully appreciate the National Natural Science Foundation of China (Grant No. 51609091), Priority Academic Program Development of Jiangsu

magnitude but can obviously increase the welding displacement.

is evaluated through numerical simulation and CM. To validate the computed residual stresses, CM measurement is conducted. The results of the CM measurement are compared with the residual stresses computed by TEP FE. Based on the simulation and measured results, the following conclusions can be drawn:

sidering the back-gouging process were accurate and effective.

*New Challenges in Residual Stress Measurements and Evaluation*

TEP FEM is identified with the measured result.

**6. Conclusions**

**Figure 14.**

*Comparison of z-direction welding displacement.*

**Acknowledgements**

**120**

Qingya Zhang1,2, Hong Zhou1 and Jiangchao Wang<sup>2</sup> \*

1 School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang, China

2 School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan, China

\*Address all correspondence to: wangjiangchaocn@gmail.com

© 2020 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
