How can we calculate thermal strain in a composite?

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Max Migliorato

Do you mean measure, extrapolate from experiment or model?

I would have thought DFT should be capable of that. Alternatively a Force Field that is able to replicate thermodynamic properties accurately.

Charles Mareau

Considering you know the the CTE of each material and you want to CALCULATE the thermal stresses, the use of a self-consistent or Mori-Tanaka approximation should give you a reasonable estimation of the thermal stresses.