Jp. Crine et al., INFLUENCE OF FATIGUE ON SOME ELECTRICAL AGING MECHANISMS OF POLYMERS, IEE proceedings. Science, measurement and technology, 143(6), 1996, pp. 395-398
The role of fatigue in the electrical endurance of crosslinked polyeth
ylene and polypropylene and in water treeing in crosslinked polyethyle
ne is discussed. Analysis of existing experimental results shows that
the number of AC field cycles is a much better normalising parameter o
f electrical aging than time. It also suggests that the water-tree len
gth and density increase logarithmically with the number of cycles, ap
parently independently of the test frequency.