Discussion
Consider the following statements about widespread fatigue damage:
1. It involves many cracks at similar details appearing at once.
2. Adjacent cracks can link up through the remaining ligaments.
3. It strengthens the case for fail-safe design.
Which of the statements given above is or are correct?
Answer: A
The first two describe the phenomenon. The third is the reverse: widespread damage undermines the fail-safe assumption that alternative load paths remain intact, which is why ageing aircraft programmes address it specifically.
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