Calculation of the stresses in the interface of two tube materials with different thermal expansion coefficients and unequal elasticity modules

Attention!

This calculation is only a simplified estimation, and does not replace a detailed design calculation.
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Temperature of the material 1   °C
Temperature of the material 2   °C
Elasticity module of the material 1   N/mm²
Elasticity module of the material 2   N/mm²
Poisson´s ratio  
Linear thermal expansion coefficient of the material 1   m/m·°C
Linear thermal expansion coefficient of the material 2   m/m·°C
Middle radius   mm