Type

Journal Article

Authors

M. D. Gilchrist
M. Hussey
Conor T. McCarthy

Subjects

Engineering

Topics
finite element model indentation cutting energy experiments sharpness scalpel blades finite element analysis

An Investigation into Scalpel Blade Sharpness Using Cutting Experiments and Finite Element Analysis (2005)

Abstract This paper presents an investigation into the sharpness of a surgical scalpel blade. An experiment was carried out in which a surgical scalpel blade was pushed through an elastomeric substrate at a constant velocity. The force-displacement characteristics were examined by plotting the stiffness as a function of blade displacement and it was found that this curve could clearly identify the point where the material separates to form a cut. A blade sharpness measurement was defined as the energy required to initiate an opening or cut in the substrate. A finite element model was developed to examine the stress state in the substrate at the point where the opening initiates. The development of this model is described. The model was validated against the experiment and close agreement was obtained. The von-Mises stress distribution under the blade tip was plotted and it was shown that the peak stress actually occurs away from the blade tip, suggesting that material separation would initiate away from the substrate surface.
Collections Ireland -> University College Dublin -> Mechanical & Materials Engineering Research Collection
Ireland -> University College Dublin -> College of Engineering & Architecture
Ireland -> University College Dublin -> School of Mechanical and Materials Engineering

Full list of authors on original publication

M. D. Gilchrist, M. Hussey, Conor T. McCarthy

Experts in our system

1
M. D. Gilchrist
University College Dublin
Total Publications: 172