Orthotropic Cyclic Continuum Constitutive Model For Masonry Structures And Comparative Studies

There is a very popular fable, dating back to the early 1800s, about three little pigs that build their houses of different materials and a wolf that tries to catch them by blowing down their houses. From the three houses built from straws, sticks or bricks, only the house made out of bricks withstands the blow of the wolf. Although the moral of...

Nonlinear dynamic atomic force microscopy

Most physical phenomena be it mechanical, chemical or biological are inherently nonlinear in nature. In fact, it is the linear phenomenon that is the exception rather than the rule. By harnessing these nonlinearities one can obtain far greater information about the underlying physics and develop more sensitive and efficient devices. This is...

Application of Virtual Fields Method for the mechanical characterization of atherosclerotic plaques

Atherosclerosis is a lipid-driven inflammatory disease of the arteries. It causes<br/>increased thickness of the intima layer of an artery, due to build-up of, among<br/>others, lipid deposits. Eventually, this could cause rupture of the blood vessel’s<br/>wall, leading to thrombus forming and possibly to clinical events. Clinically, the<br/...

Model-based validation of a tracking algorithm to quantify strain in muscles from two-dimensional ultrasound images

Fascicle shear is theoretically a mechanism by which skeletal muscles lengthen. Existing ultrasound based techniques allow measurement of muscle architecture parameters, but not the quantification of shear strain. In this study, an algorithm that tracks the shear strain from ultrasound images using a continuum representation of the muscle was...

On the origin of amplitude reduction mechanism in tapping mode atomic force microscopy

The origin of amplitude reduction in Tapping Mode Atomic Force Microscopy (TM-AFM) is typically attributed to the shift in resonance frequency of the cantilever due to the nonlinear tip-sample interactions. In this paper, we present a different insight into the same problem which, besides explaining the amplitude reduction mechanism, provides...

Algorithmic formulation and numerical implementation of coupled electromagnetic-inelastic continuum models for electromagnetic metal forming

Electromagnetic metal forming is a contact-free high-speed forming process. The deformation of the workpiece is driven by a material body force, the Lorentz force, that results from the interaction of a pulsed magnetic field with eddy currents induced in the workpiece by the magnetic field itself. The purpose of this work is to present a fully...

Computing strain fields from discrete displacement fields in 2D-solids

Some observations on localisation in non-local and gradient damage models

Finite element procedure for modelling fibre metal laminates