Machine-translated by Google. Questions are authored in English.
Top

Discussion

An engineer proposes a test spectrum containing frequent large overloads to be conservative. The proposal is

  • A.Sound if the overloads are compressive
  • B.Sound only for steel structures
  • C.Unsound; overloads retard crack growth
  • D.Sound and standard practice

Answer: C

Each overload leaves compressive residual stress at the crack tip that slows subsequent growth, so a spectrum rich in them demonstrates a longer life than the real usage would deliver. Spectrum development takes considerable care over this.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.