How can I prevent deformation of an ultrathin-walled tube during insertion?

AI Thread Summary
To prevent deformation of an ultrathin-walled tube during insertion, it's crucial to consider the design and material properties of both the outer and inner tubes. The outer tube, with a tapered end and wall thickness of 0.3-0.5 mm, may require specific rigidity parameters to withstand the average insertion force of 50 Newtons. A detailed diagram showing the relative positions of the tubes and membrane is necessary for accurate advice. Experimenting with materials like brass or aluminum tubes could provide practical insights into the deformation risks. Overall, consulting with the manufacturer about material specifications and conducting experiments will help mitigate deformation during the insertion process.
edwardone123
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Designing mechanical system where two concentric tubes will pass through high density membrane.
Outer tube will have tapered end .Outer tube will have ultra thin walls (about 0.3-0.5 mm) .Inner tube is more rigid and will fill all space inside outer tube,decreasing chance for deformation of outer tube .Still afraid about possible deformation of outer tube during process of insertion.I know that an average insertion force is about 50 Newtons
My main condition : prevent deformation/tearing of out er tube during insertion process
Questions
What parameters of material (rigidity ,something else ? ) I need to discuss with manufacturer of this part?
Thank you
 
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Before we can comment sensibly on specifications we will need a diagram that shows the relative positions of the membrane and the two tubes. Wall thickness is relative, what are the tube lengths and diameters?
 
What size/length tubes are we talking about? How about visiting a model plane shop and buying some brass or aluminium tube to experiment with? Hypodermic needles are pretty strong and come in a range of sizes. 50N doesn't sound like much.
 

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