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

AI Thread Summary
The discussion focuses on modeling the forces acting on a needle as it penetrates tissue, emphasizing the friction generated by the needle-tissue interaction. The pressure exerted by the surrounding tissue is crucial for calculating this friction force. Participants suggest using the relationship between pressure, volume, and force, specifically considering the length of penetration. To determine the tissue pressure, deformation and Young's modulus are proposed as necessary properties for accurate calculations. Understanding these mechanics is essential for improving needle insertion techniques in medical applications.
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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