Thermal expansion + different materials

[nelros]

Hi,
I am running a simulation with two materials. One material is defined as orthotropic. The other one also but with values =0.
When plotting the results, there is a jump in stress between those materials.
Any idea why that happens?

Thank you in advance!

 

[Elabbasi]

If you have two adjacent materials with different thermal expansion coefficients it makes sense that there would be a stress discontinuity at the interface. The surface tractions on the interface must be equal on both sides due to equilibrium (both normal and tangential components) but not the complete stress tensor.

Nagi Elabbasi

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