Improved Thermal Stress Resistance Parameters Considering Temperature Gradients for Bricks in Refractory Linings

Abstract

The thermal stress resistance (TSR) parameters available in the literature are basically “figures of merit” that should help for the selection of materials for engineering design involving thermal stress fracture. However, they are based on very simplified models. For instance, they neglect or simplify the thermal gradient or rather the stress field that actually exist in practice. The state of stress was analytically calculated and the results implemented in the established thermal stress fracture parameters (R, R″) and damage parameter (). For each of them, an analytical solution and an approximation were derived. The reviewed TSR parameters allow a clearly improved prediction of the resistance to thermal shock for bricks in refractory linings and facilitate the classification of industrial refractories.