Simulation Of Bone Indentation
Author(s)
S. Kasiri, G. Reilly & D. Taylor
Abstract
Finite Element (FE) methods have been widely used to model fractures. The
Theory of Critical Distances (TCD) was proposed to predict the fatigue fracture
of materials. With the introduction of FE models, this theory has been developed
and extensively applied to different materials. FE models of fractures usually
need a high resolution meshing or remeshing due to introducing new cracks. This
can be a disadvantage, e.g. when the fracture plane of the material is under
compression. In this paper the TCD was adopted to predict the multiaxial
fracture of bone with the aim of studying the effects of geometry on fracture
force.
Keywords: bone, fracture, indentation, multiaxial failure, Theory of Critical
Distances.
1 Introduction
In different surgeries various kinds of blades are used for cutting bone. Bone has
a complicated composite structure and many researchers attempt to understand
the mechanism of fractures. Understanding the fracture mechanism, cutting
process and predicting the fracture load is useful to optimize the surgical blades.
To predict the fracture load especially in complicated problems, computer
modelling is necessary. Finite Element (FE) methods have been extensively
employed to simulate the fracture and cutting process.
The first model of the cutting process using FE obtained the fracture load by
simulating the crackâs growth until it was an unstable crack. The maximum force
before the unstable crack is the cutting force. In a general classification, two
different sorts of FE analysis have been proposed to study the crack propagation,
the discrete and smeared approaches [1]. The discrete approach deals with the
fracture process by introducing a discontinuity in the geometry of the structure
Keywords
bone, fracture, indentation, multiaxial failure, Theory of Critical
Distances.
Related Book
Other papers in this volume
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