Finite Element Simulative Analysis on the Influence of Solid-State Transformation on Welding Residual Stress

Abstract:

This paper takes the Q345 steel as an example, adopting finite element simulative analysis to study the influence of solid-state transformation on welding residual stress. By setting the value of the thermal strain in different temperature, the change in volume caused by the phase changes is equivalent to the thermal strain. Simulation includes two cases which are consideration of phase transformations and not consideration. The results showed that the distribution trend of the longitudinal stress of the weld zone is substantially the same in the two simulations. In the case of not consider the simulation of phase change, there is a lot of stress in the weld zone and the heat affected zone and the maximum value could be 427 MPa. In regard to transverse stress, phase change not only affects the value of the stress, but also changes the direction of the stress of the weld middle portion. Welding residual stress is also measured by X-ray. Phase change simulation and experimental results are in good agreement, it can be concluded that phase change in the welding process will result in a significant impact on the distribution of the residual stress, which could not be ignored in the finite element simulation of welding process.

• Periodical: Advanced Materials Research (Volumes 785-786)
• Pages: 1229-1235
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.785-786.1229
• Online since: September 2013
• Authors: Chun Run Li, Zhi Peng Zhang, Yi Ming Zhang, Zong Tao Fang
• Keywords: Finite Element Simulation Analysis, Phase Change, Thermal Strain, Welding Residual Stress

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