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Situation • Linear-elastic fracture mechanics not applicable to refractory materials • Largely empirical design and selection of refractory linings • Damage to the refractory lining of heat-exposed installations as a result of thermal shock stress • Production stoppages and significant maintenance requirement
Solution • Development of a new method for the thermo-mechanical durability analysis of refractory designs • Application of the wedge splitting method to the quantitative determination of fracture mechanics parameters • Determination of the crack resistance behaviour (R-curves) • Numerical simulation (FEM) of thermomechanical stresses under boundary operating conditions Benefits • Reliable and inexpensive testing, creation and optimisation of refractory designs • Precise harmonisation between the thermal shock resistance required for the refractory lining and the operation of the plant and equipment • Comparability of different refractory materials • Efficient tool for the development and advancement of new and existing refractory materials • Improved service life spans, less production lost, lower maintenance costs • Significant savings in operating costs
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