[Milsurplus] Question on distorting coax shape

[John Hensley]

I'm looking for some test data, preferably a chart or two, which might show how the technical specifications of coax (impedance, frequency efficiency, et al) are affected when the coax shape is deformed, e.g. as the coax cross sectional shape is distorted or changed.  
For example, imagine a worker dropping coax down from a tower and, using a tie wrap gun, over tightens the tie wrap so that the coax is squeezed out of shape.  Or, imagine the coax is flattened at a point because of some other event.  
QSO via private or list email is okay.
Thanks,
John W5JV