In this study, a finite element (FE) model of a below-knee prosthesis of patellar tendon-bearing (PTB) design, and several altered variations of the model have been constructed. A load of approximately 1.5 times normal body weight (984 N) was applied at the heel of the model to simulate heelstrike conditions. The "base" model was then analyzed and revised iteratively until a model which provide...

This thesis sought to examine the influence of the vascular bed on the tissue response to endovascular stent implantation. Closed form analytic solutions were obtained for the different beds studied. Ideal arteries were considered of normal, tapered, curved, or eccentric morphology. The application of the stent boundary conditions in the appropriate defining equations produced the desired strai...

Motivated by recent experiments showing that a variety of stiff biopolymer gels exhibit highly unusual negative normal elastic stresses, we simulate networks of elastic rods over a wide range of concentrations and bending stiffness. In all cases, we find that sheared networks develop significant negative normal stresses that coincide with other elastic nonlinearities, including shear stiffening...

The contour method of residual stress measurement has recently been adapted to measure fractured, rather than cut specimens. The fracture contour method was capable of determining normal residual stresses acting prior to the planestrain failure of a large aluminium alloy forging, but shear residual stresses could not be measured (Prime et al., 2014, Eng. Fract. Mech., 116, 158-171). We demonstr...

We present an analytical study of a toy model for shear banding, without normal stresses, which uses a piecewise linear approximation to the flow curve (shear stress as a function of shear rate). This model exhibits multiple stationary states, one of which is linearly stable against general two-dimensional perturbations. This is in contrast to analogous results for the Johnson-Segalman model, w...

In open channel, canals and rivers, a rapid increase in flow depth will induce a positive surge, also called bore or compression wave. The positive surge is a translating hydraulic jump. Herein new experiments were conducted in a large-size rectangular channel to characterise the unsteady turbulent properties, including the coupling between free-surface and velocity fluctuations. Experiments we...