Damage Properties of Carbon Cathodes Under Different Aluminium Electrolysis Time
LIU Qing-sheng1,2, HE Wen3, ZENG Fang-jin1, XUE Ji-lai2
1. Faculty of Metallurgical and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China;
2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
3. Engineering Research Institute, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
Abstract：Uniaxial compression experiments were conducted to obtain the stress-strain curves of carbon cathode samples under different aluminium electrolysis time, and the damage constitutive model of the carbon cathode was established. Experimental and theoretical results show that properties of the corroded carbon cathode, such as elastic modulus, peak strength and residual deformation, are degraded compared with the non-aluminium electrolysis ones, which are caused by the increasing of initial microscopical damage regions that random distributed in the carbon cathode. The uniaxial compression test of the carbon cathode was numerical simulated by the Realistic Failure Process Analysis software RFPA2D, and the simulation results match well with the theoretical and experimental ones. It is confirmed that the numerical simulation can be used effectively to represent the deformation and fracture process of carbon cathodes.
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