科研之友
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摘要
Assuming that the material object of heat conduction is infinite, the coefficient of thermal conductivity, volume, and specific heat are the same function of temperature. By means of the Kirchhoff transformation on thermal conductivity, a partial differential equation was obtained, and the approximate analyzing solution was obtained by Fourier integral. Based on Gaussian and ellipsoidal mobile heat sources, an analyzing model of temperature field was obtained in arc welding of finite thickness plates. The model was applied to gas tungsten arc welding through an experiment on carbon steel. The actual isotherms of the specimens' cross sections at various times from the arc start point were compared with those of the simulation result, which showed this kind of temperature field model is feasible; thus the material physical properties are promoted under the temperature field model.
- 出版日期2017-4
- 单位天津工业大学
