Stress distribution evolution in a ceramic body during firing. Part 2. Profile calculation

Abstract

Stress distribution during firing is reported. The calculation is performed based on the model stated in the part 1. Starting data correspond to the constitutive models presented in part 1. Besides, an experimental measurement was performed to obtain the Young modulus and the thermal dilatation to be considered for calculations. Starting from the stress equilibrium, it may be reported that: 1) The stress distribution during hot forging is always similar in spite of different pressing conditions and different considered constitutive behaviors. 2) The thermo-elastic behavior may be considered as an acceptable approximation. 3) The temperature gradients and their effect on the body viscosity and on thermal dilatation play an essential role in the stress distribution.