Thanks for your reply.
You are saying that stretching an open tube, the length of the tube will grow and the wall thickness of the tube will shrink.
However, if the tube is sealed on both ends, similar to a pressure vessel, the stretching will cause the internal pressure to drop (gas law)...
If a rubber tube of length L and outside diameter OD and inside diameter ID is stretched along the long axis, the OD and ID will shrink correspondingly.
The question is how can the shrinkage be calculated from the material properties of the rubber and the applied stress?
My sense is that the...
