Hello Ruby

I agree with most of Werner's comments but would add

1. some people try to manipulate Coffin Manson for time dependancy by
using modified slopes of the graph.

2.Do you mean strain range not stress to equate to the temperature range?

3. I think that if there are different rates of heating and cooling (
lower than those for shock ) then there could be an effect because of the
inbalance in time dependence effects. This phenomenon certainly occurs in
mechanical fatigue. We are looking into this problem.

Bill Plumbridge - Solder Research Group - The Open University- UK

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