This model approximates the linear shrinkage using the formulation:
where
-
is the linear thermal expansion coefficient (CTE) at temperature
T
in the
i-th
principal direction. The temperature-dependent CTE
i is considered, using a special PVT-scaled approach.
- T0 is the temperature when the local cavity pressure reached the atmospheric condition. This value is obtained from the flow simulation.
- Tr is the room temperature.