I'm looking at doing a dynamic analysis (Random Environment) on a simple circuit board assembly using Pro/Mechanica. Based on your experience, what is the best way to model the interface between the part and board. I really don't care about getting into individual solder joints, but just to show a connection between the two. Does Mechanica automatically assume a weld between surfaces that touch? If so, this should be fine. See example below and thanks for your input. -Randall