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

Click For Summary
SUMMARY

The discussion centers on preventing deformation of an ultrathin-walled outer tube (0.3-0.5 mm) during the insertion process of two concentric tubes through a high-density membrane. The outer tube features a tapered end, while the inner tube is more rigid, designed to minimize deformation risk. Key considerations include material rigidity and specific parameters to discuss with the manufacturer. The average insertion force is noted to be approximately 50 Newtons, which is deemed manageable.

PREREQUISITES
  • Understanding of mechanical design principles
  • Knowledge of material properties, specifically rigidity
  • Familiarity with tube dimensions and tolerances
  • Experience with prototyping and testing materials
NEXT STEPS
  • Research material specifications for ultrathin-walled tubes
  • Explore methods for measuring insertion force and its effects on tube deformation
  • Investigate prototyping techniques using brass or aluminum tubes
  • Learn about the mechanical properties of hypodermic needles as a comparison
USEFUL FOR

Mechanical engineers, product designers, and anyone involved in the design and testing of tubular structures in mechanical systems.

edwardone123
Messages
4
Reaction score
1
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
 
Engineering news on Phys.org
Welcome to PF.
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.