This paper deals with the mathematical modelling of the contact angle of a metal strip supported by periodically assembled rolls, as it is often the case in strip processing plants. The derivation of the governing differential equation is carried out by means of the calculus of variations for moving boundaries. An ideal-elastic-idealplastic material law of a periodic bending cycle is introduced...

A new two-stage approach for brain image registration is proposed. In the first stage, an active contour algorithm is used to establish a length-preserving, one-to-one mapping between the cortical and the ventricular boundaries in the two images to be registered. This mapping is used in the second step by a two-dimensional transformation which is based on an elastic body deformation. This metho...

This report describes our initial in vitro results with roboticallyassisted strain imaging for intraoperative monitoring of hepatic tumor thermal ablation. First, we demonstrate a strong correlation between thermal ablation of liver tissue and changes in elastic properties. Second, we present an experimental environment to provide controlled robotically-assisted compression of liver tissue with...

Non-planar solid-fluid-solid interfaces under stress are very common in many industrial and natural materials. For example, in the Earth’s crust, many rough and wavy interfaces can be observed in rocks in a wide range of spatial scales, from undulate grain boundaries at the micrometer scale, to stylolite dissolution planes at the meter scale. It is proposed here that these initially flat solid-...

The finite-element method is used to perform an accurate numerical study of the normal indentation of an elastic-plastic half-space by a rigid sphere. The effects of elasticity and strain-hardening rate of the half-space are explored, and the role of friction is assessed by analysing the limiting cases of frictionless contact and sticking friction. Indentation maps are constructed with axes of ...

A new two-stage approach for nonlinear brain image registration is proposed. In the first stage, an active contour algorithm is used to establish a homothetic one-to-one map between a set of region boundaries in two images to be registered. This mapping is used in the second step: a two-dimensional transformation which is based on an elastic body deformation. This method is tested by registerin...

We study the kinetics of phase transformations in solids using the peridynamic formulation of continuum mechanics. The peridynamic theory is a nonlocal formulation that does not involve spatial derivatives, and is a powerful tool to study defects such as cracks and interfaces. We apply the peridynamic formulation to the motion of phase boundaries in one dimension. We show that unlike the classi...

Dislocation channeling observed in irradiated metals has been thought to be one of the key stress factors in irradiation assisted stress corrosion cracking since it is an evidence to suggest that the slip deformation is localized and that the strong misfit are generated at grain boundaries. In the present study, the stress concentration and defect nucleation of polycrystalline copper thin film ...

A finite element analysis of intergranular normal stresses is performed in order to identify a possible statistical correlation between the and corresponding grain boundary type within polycrystalline aggregate. Elastic continuum grains cubic lattice symmetry are assumed analysis. Meaningful results obtained by analyzing first two moments on several types. Among five macroscopic parameters (5D)...

There are several methods in which grain boundaries can be made for modelling, but most produce planar (flat) grains. In this study, we investigated the difference materials properties between polycrystalline systems comprised of and curved boundaries. Several structural mechanical both were determined. For with boundaries, it was found that elastic moduli all larger magnitude, excess volumes c...