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A honeycomb sandwich panel achieves high bending stiffness for its weight because

  • A.The core carries the bending stress
  • B.The facesheets carry the shear
  • C.The adhesive carries the direct stress
  • D.The core holds the facesheets far apart

Answer: D

The facesheets act as the flanges of a beam and the core simply holds them apart while carrying the shear between them. Since stiffness grows with the square of the separation, a very light core buys a great deal, which is why sandwich is used for floors and control surfaces.

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