Soldering simulation with consider only CTE of 2 different material. I put tie constraint and predefined field of temperature 210 deg C in first step and 25 deg C in second step. Step is staic general step. and fixing bottom nodes as fixed- fixed condition. I need to know any other interaction should be specified and how do include density and effect of gravity? Thermal conductivity and HTC are not taken into account.
Add a density value to the definition of materials' properties and then add a gravity load.
Fro reference, check this discussion on ResearchGate
https://www.researchgate.net/post/How_to_define_self_weight_in_Abaqus
or the Abaqus manual
http://abaqus.software.polimi.it/v6.14/books/usi/default.htm?startat=pt03ch16s09hlb09.html
According to your stated aim, there seems no need for additional interactions.
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