residual stress from laser heating

Hello

I am trying to determine residual stress on a metallic ribbon (28 micron) because of laser heating. The heat source is a continuous wave laser having gaussian profile. I have already got spatial and temporal temperature distribution from "heat transfer in solid" model in comsol 4.2. But I do not know how to get residual stress. Can anyone help me on this topic? thank you

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Farhad