Mahdieh Babaiasl have been chosen to represent Mechanical and Materials Engineering Department at WSU’s 2019 3 minute research competition.
Abstract of the proposal for the competition is as follows:
Water-jet technology has recently been used in medical applications such as surgery for dissection of organs, dentistry, bone cutting, and wound debridement.
Measuring, and controlling depth of cut of water-jet is important for medical applications.
For example, in surgical applications using water-jet, selective cutting is a must, and water-jet should cut the desired layer and should not go further, and this requirement dictates a predictive model for it.
We have experimentally studied the effect of tissue stiffness, needle diameter, and waterjet speed on cut-depth.
Experimental results showed that cut-depth has a direct relationship with flow rate, and an inverse relationship with elastic modulus of the tissue and needle diameter.
A finite element model is developed to predict the cut-depth. In order to have a mathematical relation for control purposes, a predictive mechanics-based model is also developed for depth of cut as a function of tissue properties (toughness, and constitutive response) and waterjet needle properties (diameter, and velocity of water-jet).
The results showed that finite element model, and mathematical model give a reasonable prediction of depth of cut of water-jet in soft tissue.
The developed mathematical model can work for all soft tissues given their toughnesses, and shear moduli.
This work is really significant for applications such as waterjet- assisted surgery to selectively cut tissue layers in order to avoid injury, water-jet steerable needles in which a flexible needle is guided in curved paths cut by water-jet through human anatomy, and any waterjet-assisted medical application where controlling the cut-depth is important.
A single static PowerPoint slide was allowed to use as the presentation:
Here is a short video of the presentation:
You can see the other posts on the waterjet steerable needles in the link below:
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