Numerical Simulation of the Welding Process and Phase Field modelling of the Fracture behavior of X80 steel Welded Pipes in the presence of Hydrogen
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This project explores the application of numerical methods in engineering to conduct virtual tests, specifically focusing on welded joints of X80 steel pipes for hydrogen transportation. The objective is to establish a predictive methodology for fracture in these joints through a digital model reflecting real fracture processes. The integrated program aims to forecast fracture conditions post-welding, accounting for process parameters and material properties. Utilizing the finite element method with thermal-mechanical coupling, the model calculates thermal cycles and residual stresses induced by non-uniform heating during welding. Subsequently, microstructural changes are considered using the phase field technique to analyze the fracture process. Crucially, the numerical modeling extends to the fracture process within an environment rich in hydrogen concentrations, altering the material's fracture behavior. By examining the interplay of welding conditions, mechanical and thermal properties, and hydrogen diffusion, this project provides insights into enhancing the structural integrity of X80 steel pipes in hydrogen transport applications.
