Distributed springs are a very nice tool in FEA. The ability to connect 2 parallel surfaces with a spring makes for a much faster way to model something like tape or an O-ring in a model instead of having to do a super fine mesh for a part that will have a very high aspect ratio. Here is an example of how it is implemented in Solidworks.https://help.solidworks.com/2016/English/SolidWorks/cworks/r_Connector_-_Spring.htm
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