Is a pressure vessel more likely to fail from repeated cycles of low pressure or a one off high pressure spike?
Any material will experience a reduction in strength under cyclical loading (fatigue analysis).
So I would be asking what’s more likely:
- the number of cycles to failure under the specified stress cycles is reached
- OR, the peak-pressure condition occurs which creates more stress than the maximum static yield strength of the material.
Using that you could answer this question.