Energy Distribution Modeling During the Electron Beam Welding Using Dynamically Changing Thermophysical Parameters of the Product

Abstract

AbstractThe article is devoted to the problem of modeling the energy distribution in the welded joint zone of a product made of VT14 titanium alloy, obtained using the method of electron beam welding. To ensure high accuracy of modeling, it is proposed not to use static values of thermophysical parameters of a product, but their dynamically changed values depending on the current temperature at the point of calculation. Regression models are used to restore the dependence of thermophysical parameters. As a result of experimental studies, it was revealed that a linear regression equation is effective to restore the dependence of the specific heat capacity; for the coefficient of thermal expansion and the heat capacity parameter - the cubic regression equation; for density - quadratic regression. The constructed regression equations allow obtaining the smallest approximation error of the existing tabular values. To solve the problem of modeling the energy distribution, a calculation algorithm was developed for the MATLAB system, considering the dynamic change in thermophysical parameters during the simulation. The conducted experimental study showed that the application of the proposed approach allows one to obtain a more natural model of energy distribution. #CSOC1120.KeywordsElectron-beam weldingMathematical modellingTechnological parametersElectron beamOptimization of process parametersInput-output of an electron beamControl automation