13th International Conference on Fracture June 16–21, 2013, Beijing, China -4- 3.3. Boundary conditions for calibration static (steady-state) model (1) The temperature of the heat source is 330oC (2) The other surfaces that without contact with the heat source will with Convection region. Figure 4. Experiment configuration of thermocouples for measuring the temperature The convection is assumed to have a small impact on the heat distribution. A fixed heat transfer coefficient (h) is therefore assumed over the working piece. It was estimated (hfinal) by varying the parameters of the analytical results to match with the measured ones at the thermocouples. The thermal properties of the ceramic plate (Table 1) were given to the calibrate model and to the grinding model. Table 1. Thermal properties of the ceramic plate Density Specific heat Thermal conductivity Material 3 2520 Kg m ρ ⎡ ⎤ = ⎢ ⎥ ⎣ ⎦ 0 790 p J c Kg C ⎡ ⎤ = ⎢ ⋅ ⎥ ⎣ ⎦ 3 0 1.46 10 w k mm C − ⎡ ⎤ = ⋅ ⎢ ⋅ ⎥ ⎣ ⎦ Machinable Ceramic
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