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Fasteners in a global airframe model are often represented by

  • A.Nothing at all, with the parts left unconnected
  • B.Fully rigid connections in every case
  • C.Solid elements meshed in detail
  • D.Spring or connector elements with a calibrated stiffness

Answer: D

A calibrated spring reproduces the joint's flexibility, which materially affects load distribution between parts, without the cost of modelling every fastener in three dimensions. Treating every joint as rigid stiffens the model and misdistributes the load.

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