Inverse Simulation of Fracture Parameters for Cement-Bonded Corundum Refractories
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In order to obtain the real solution of the fracture parameters for the wedge-splitting test, numerical simulation and inverse algorithm have been designed to estimate the maximum tensile stress and fracture energy of cement-bonded corundum refractory. The experimental and simulated curves have been systematically compared to produce the bilinear model of cohesive zone material with the inverse algorithm of nonlinear least-squares solution being the most suitable for the simulation of the wedge-splitting test. Furthermore, the inverse simulation procedure has been applied to specimens of various heating temperatures and cement contents. Consequently, the fracture energy and the maximum tensile stress initially decrease and then increase with the temperature. Furthermore, the fracture energy has the tendency of increasing with the cement content, and the maximum tensile stress has the highest peak at the content of 10 wt.%. Additionally, the cement-bonded corundum refractory presents higher brittleness after high-temperature heating (1400°C) or with the cement content of 10 wt.% at 110°C.
The authors are grateful to the National Natural Science Foundation of China (51974211, 51872211 and 51702240) for financial support.
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