[Mechanics of Solid] Friction on a needle inserted in tissue

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SUMMARY

This discussion focuses on modeling the friction forces experienced by a needle as it penetrates tissue. The key formula for calculating the friction force is derived from the relationship between pressure, volume, and force, specifically expressed as Pressure * Volume = Force * h, where h represents the length of penetration. To accurately determine the pressure exerted by the tissue on the needle, it is essential to utilize properties such as deformation and Young's modulus of the tissue material.

PREREQUISITES
  • Understanding of Young's modulus and its application in material science
  • Familiarity with basic physics concepts, particularly force and pressure
  • Knowledge of tissue properties relevant to biomechanics
  • Experience with mathematical modeling in physical systems
NEXT STEPS
  • Research the application of Young's modulus in biological tissues
  • Explore mathematical modeling techniques for friction in biomechanics
  • Learn about the mechanical properties of different tissue types
  • Investigate advanced friction models for needle-tissue interactions
USEFUL FOR

This discussion is beneficial for biomedical engineers, researchers in biomechanics, and professionals involved in medical device design, particularly those focusing on needle insertion techniques and tissue interaction dynamics.

Prathmesh Deshmukh
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Hello ,
I'm trying to model the forces on a needle being inserted in a tissue. Needle tip penetrates the tissue surface and as it moves through the tissue, it experiences friction from needle-tissue interaction. Friction arises from the pressure exerted by surrounding tissue as it grips the needle. Assuming we have all the properties data for the tissue material, needle dimensions etc, how can we determine the pressure from the tissue ? [for friction force calculation]
 

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U can use the formula Pressure * Volume equals Force*h(h is length of penetration)
 
Parixit said:
U can use the formula Pressure * Volume equals Force*h(h is length of penetration)
That's true. But how would you calculate the pressure exerted by tissue on needle? I'm sure that we have to use the deformation / young's modulus or some another property of the tissue to find the pressure.
 

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