Rudd R.E. – TechConnect Briefs

Mechanics of silicon nanowires: size-dependent elasticity from first principles

Rudd R.E., Lee B., Lawrence Livermore National Laboratory, US

We have conducted a detailed study of the size dependence of the mechanical properties of silicon nanowires using first principles quantum mechanical calculation together with continuum mechanics theory and atomistic simulation based on empirical potentials. [...]

Coarse-Grained Molecular Dynamics for Nano-Design

Rudd R.E., Lawrence Livermore National Laboratory, US

The design of nanoscale mechanical systems poses a novel set of challenges for modeling and simulation. The need for an accurate model of the nanoscale components is clear. This can be of the form of [...]

Coarse-Grained Molecular Dynamics for Nano-Design

Rudd R.E., Lawrence Livermore National Laboratory, US

The design of nanoscale mechanical systems poses a novel set of challenges for modeling and simulation. The need for an accurate model of the nanoscale components is clear. This can be of the form of [...]

Modeling AFM Induced Mechanical Deformation of Living Cells

Rudd R.E., McElfresh M., Balhorn R., Allen M., Belak J., Lawrence Livermore National Laboratory, US

One challenge with using Atomic Force Microscopy (AFM) for recognition microscopy on living cells is the fact that the cell is not rigid, and as the force is applied to a receptor site, it is [...]

Coarse-Grained Molecular Dynamics and Multiscale Modeling of NEMS Resonators

Rudd R.E., Lawrence Livermore National Laboratory, US

We review concurrent multiscale simulations of dynamic and temperature-dependent processes found in nanomechanical systems coupled to larger scale surroundings. We focus on the behavior of sub-micron Micro-Electro-Mechanical Systems (MEMS), especially microresonators. These systems are often [...]

Modeling of the Deformation of Living Cells Induced by Atomic Force Microscopy

Rudd R.E., McElfresh M., Baesu E., Balhorn R., Alleny M., Belak J., Lawrence Livermore National Lab., US

We describe finite element modeling of the deformation of living cells by atomic force microscopy (AFM). Cells are soft systems, susceptible to large deformations in the course of an AFM measurement. Often the local properties, [...]

The Atomic Limit of Finite Elements in the Simulation of Micro-Resonators

Rudd R.E., University of Oxford, UK

We describe developments in the coupling of length scales methodology which allows the simulation of the dynamic and temperature dependent behavior of sub-micron Micro-Electro-Mechanical Systems (MEMS). This novel technique accurately models the behavior of the [...]

Coupling of Length Scales and Atomistic Simulation of a MEMS Device

Rudd R.E., Broughton J.Q., SFA, Inc., US

We simulate the dynamic and temperature dependent behavior of two different Micro-Electro-Mechanical Systems (MEMS) by utilizing recently developed parallel codes which enable a coupling of length scales. The novel techniques used in this simulation accurately [...]