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Question: 5 plastic pipe used in pneumatic systems is rated to...

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5. Plastic pipe used in pneumatic systems is rated to 20 bar. The pipe has a 10mm outside diameter and 6mm inner diameter. Use thin walled theory to evaluate the hoop stress experienced by the pipe under this rated pressure. What assumption is made in the derivation of the thin walled equations which mean this is this not an appropriate approach in this case? Use thick walled theory to derive an expression for hoop stress through the wall thickness and evaluate this at both the inner and outer wall of the pipe. [14] END OF PAPER

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