It is sudden and total
distinguishing and dangerous
fluctuating and gives no warning
occurring frequently but is always present
relatively a much more complicated phenomenon
the initiation is dark and repeated in very large numbers
different members fracture from the tension
gradually the level strain will yield
but then time can and will vary
until we’re static again.


Source: Richard G. Budynas and J. Keith Nisbett, “Shigley’s Mechanical Engineering Design”, McGraw Hill, 2015