Damage of refractory castables based on 3D mesoscopic stochastic model
The study of damage to refractory castables at the mesoscopic scale is significant for revealing damage's evolution process and mechanisms.With the help of computer-aided technology,a 3D mesoscopic stochastic model program for refractory castables was meticulously crafted using Matlab,and a 3D mesoscopic stochastic model conforming to the particle size distribution of refractory castables was established in combination with the Comsol Multiphysics modeling.The model,subsequently,was transferred into Abaqus,and the maximum principal stress criterion was used as the crack initiation criterion to study the whole process of damage evolution of refractory castables.It is found that this model can capture the micro-crack propagation behavior across microscopic to mesoscopic scales.In the application process of refractory castables,microcracks usually start at the defects of the matrix part and expand rapidly in the 45° direction around the aggregate.The stress distribution at the tips of adjacent cracks between the matrix and the presence of aggregate can affect the propagation path of cracks,causing them to deflect around the aggregate and bend away from the aggregate particles.The result is consistent with the actual damage and failure results.
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