Thanks all - this gives me a starting point. In a couple years if/when this develops from hair brained idea to standard industry practice I'll have to remember to acknowledge this webpage.
I have to design a pipe that will deliberately be subjected to cyclical stress, eg the pipe will have a motion similar to a skipping rope although the amplitude of vibration will be 0.1m and the pipe length will be about 30 m. The pipe will be used until it fails and then will be replaced, to...
