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Classical laminate theory predicts laminate behaviour by

  • A.Treating the laminate as isotropic
  • B.Considering only the outermost plies
  • C.Summing transformed ply stiffnesses
  • D.Averaging the ply properties arithmetically

Answer: C

Each ply's stiffness is rotated into the laminate coordinate system and integrated through the thickness, producing the A, B and D matrices. It assumes a perfect bond and plane sections remaining plane, and it says nothing about interlaminar stresses.

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