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The building block approach to composite certification means

  • A.Testing only the full-scale article
  • B.Testing only small coupons
  • C.Certifying by analysis alone
  • D.Testing runs from coupons to full scale

Answer: D

Because composite failure is not predicted from first principles as reliably as metal yielding, confidence is built up through a pyramid of tests of increasing complexity and decreasing number. The approach is far more test-intensive than metallic certification.

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