Discussion
Assertion (A): An occasional tensile overload can lengthen the life of a cracked component.
Reason (R): The overload leaves a plastic zone that closes in compression on unloading.
Select the correct answer from the options below.
Answer: A
Both statements are true and the second is the reason for the first. The retardation is real but it makes test spectra containing frequent overloads unconservative, so spectrum development takes care over how such cycles are represented.
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