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首页> 美国政府科技报告 >Long-term testing and evaluation of cathode components in a commercial aluminum cell. Addendum to final report, Extension tasks: Volume 2.
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Long-term testing and evaluation of cathode components in a commercial aluminum cell. Addendum to final report, Extension tasks: Volume 2.

机译：商业铝电池中阴极组件的长期测试和评估。最终报告增编，推广任务：第2卷。

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The purpose of modeling thermal stresses in TiB(sub 2)-G cathode elements was to aide in the design of the final TiB(sub 2)-G cathode element shape to be used in an industrial reduction cell based on knowledge of thermal stress values and an estimate of the probability of element failure. Five finite element models of four TiB(sub 2)-G cathode element shapes were constructed (Figures 1-5) to model thermal stresses resulting from step changes in temperature of 25(degree)C--960(degree)C and 300(degree)C--960(degree)C. The models were developed to represent ''worst case'' conditions, that is, conditions representing the greatest anticipated values of thermal stress likely to be encountered. ANSYS was used to perform the thermal stress modeling. ANSYS is a general purpose finite element code available from Swanson Analysis Systems, Incorporated. Modeling thermal stress in ANSYS for a step change in temperature requires an initial transient thermal analysis followed by a structural analysis. After the geometry of each model was defined, material properties were specified, and heat transfer boundary conditions developed. The finite element models were constructed using convective heat transfer boundary conditions as a means of specifying heat flow into the models. Convection faces and convective heat transfer coefficients were defined at the TiB(sub 2)-G -- molten metal interfaces. A uniform starting temperature of either 25(degree)C or 300(degree)C was assigned and the models were solved for transient temperature distribution and thermally induced stress. LCHEM codes were utilized to model voltage distribution and current density in reduction cells utilizing TiB(sub 2)-G cathode elements. 4 refs., 119 figs., 9 tabs. (ERA citation 15:034774)

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