5. Summary of results

The proposed methodology consists in determining the thermal and mechanical responses in a structure based on the calculation of a unit thermal shock and using the macro command CALC_THERMECA_MULT. This chaining has been tested and implemented, it:

• It reduces the time required to set up thermal and mechanical calculations in the linear domain,

• Is easy to set up.

It was thus possible to verify that it was possible to determine the temperature of a structure subjected to a shock \(\Delta T\), from a unit thermal shock \((\Delta {T}_{U}=1°C)\) and an initial temperature \(T(x,{t}_{0})\) by performing the following linear combination:

\({T(x,t)}_{\Delta T}=\Delta T\mathrm{.}{\stackrel{̃}{T}}_{\Delta {T}_{U}}(x,t)+T(x,{t}_{0})\)

This methodology was also tested as part of a thermomechanical analysis. From the unit thermal results, the « Unit » stresses were calculated and using the macro-command CALC_THERMECA_MULT, the stresses for shock \(\mathrm{\Delta }T=50°C\) were determined.

The maximum differences observed are, in thermal as well as in mechanics, more than 100 times smaller than the given tolerance. This is simply explained by the fact that CALC_THERMECA_MULT only encapsulates the same Code_Aster commands that the user should have set himself otherwise and that were used for the reference calculation.