2015/12/01 by Theodosios K. Papathanasiou, Papathanasiou, Theodosios K., F. Dal Corso +3
Engineering · Materials Science · #Advanced ceramic materials synthesis #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Numerical methods in engineering #Thermal properties of materials
paper · pdf · doi:10.48550/arxiv.1512.00326
openalex publication_date 2015/12/01 · openalex created_date 2022/09/23 · openalex updated_date 2026/07/28
The development of thermal stresses inside refractory ceramics experiencing\nsevere thermal shock is studied. The present analysis departs from the linear\ntheory of thermal stresses as it accounts for temperature dependent thermal and\nmechanical material properties. Radiation surface heat exchange between the\nrefractory component and its surroundings is included. A Finite Element\nProcedure is presented and a MATLAB code is developed. The nonlinear heat\nequation is solved for the temperature field and this solution is subsequently\nused in order to determine the stress field evolution. The finite element code\nis validated and used for the thermal shock estimation of a refractory brick.\nMaterial properties corresponding to Al 2O3 are selected. A thermal cycle\nconsisting of a heating stage followed by cooling down is simulated. The\nresults are compared with those predicted by the linear thermal stresses theory\nand significant deviations are observed for the examined values of the Biot\nnumber.\n