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Creating an analytical model to predict the stiffness properties of a guidewire actuated bending tip

Heeres, Roeland (2023) Creating an analytical model to predict the stiffness properties of a guidewire actuated bending tip.

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Embargo date:13 July 2028
Abstract:In this research assignment, an investigation towards the bending tip of a steerable guidewire has been conducted, specifically towards the actuation stiffness. This guidewire has an innovative concept that allows 360 degrees of rotation and 180 degrees of bending. In this research a better understanding of the stiffness properties of the bending tip is demonstrated. This analytical approach will allow for faster design iteration when changing the dimensions of the guidewire. To create a representable actuation stiffness model, the bending tip is split up into three components; the pullwire, the bridges and the helix. For each of these components the bending stiffness has been studied. The resulting model can predict the stiffness properties of the bending tip and is a suitable replacement for FEA-modelling to a large extend. The model was verified using FEA in ANSYS and is accurate within 10% of the FEM-result. It was found that the bending stiffness of the bridges, pullwire and helix act in parallel to give the actuation stiffness of the bending tip. This discovery improves the understanding of the stiffness properties of the bending tip. The model can be used during design to optimize for stiffness properties by quickly changing input parameters.
Item Type:Essay (Master)
Clients:
Demcon
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
Link to this item:https://purl.utwente.nl/essays/95801
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