Papers:
Phase Field Modeling of Dislocation Network Coarsening, Dislocation – Impurity, and Dislocation – Precipitate Interactions
Interactions of dislocations with one another and their interactions with impurities and precipitates determine the behavior of plastic deformation of crystalline materials. In this presentation, we will discuss recent advances in phase field modeling of [...]
Nanomanipulation and Characterization of Individual Carbon Nanotubes
A new tool that operates in a scanning electron microscope for measuring the mechanics of nanostructures is briefly presented, and its use to measure the response to tensile loading of carbon nanotubes is outlined.
Size Effects and Scaling in Misfit Dislocation Formation in Self Assembled Quantum Dots
Growth islands due to large mismatch strain arising in Stranski-Krastanow (SK) and Volmer-Weber (VW) film growth can be used to produce large arrays of quantum dots. This same mismatch strain may also cause misfit dislocations [...]
Computer Simulation Study of Mechanical Properties of Nanoscale Materials by Molecular Dynamics and Lattice Green’s Function Methods
The mechanical properties of nanoscale materials are studied using the molecular dynamics and lattice Green’s function methods. The initial atomic structures of the dislocations and cracks are determined both from the elastic solutions as well [...]
Theoretical Strength and Onset of Yielding in Nanoindentation
Quantum-mechanical (ab initio) approach for determining theoretical (ideal) tensile and shear strength in metals and intermetallics is briefly outlined and as an example, tensile test for defect-free MoSi2 is simulated. Theoretical values of tensile and [...]
Dislocation Processes and Deformation Twinning in Nanocrystalline Al
Using a recently developed, massively parallel molecular-dynamics (MD) code for the simulation of polycrystal plasticity, we analyze for the case of nanocrystalline Al the complex interplay among various dislocation and grain-boundary processes during low-temperature deformation. [...]
Mechanical and Electronic Properties of Strained Layer Superlattices Studied by Density Functional TB and Path Probability Methods
The atomic and electronic structures of semiconductor heterostructures including steps, misfit dislocations and interface disorder are studied by using the density-functional tight-binding (TB) method. Atomic structures of misfit dislocations both edge type 1/2 (001) and [...]
Journal: TechConnect Briefs
Volume: 2, Technical Proceedings of the 2002 International Conference on Computational Nanoscience and Nanotechnology
Published: April 22, 2002
Industry sector: Advanced Materials & Manufacturing
Topic: Materials Characterization & Imaging
ISBN: 0-9708275-6-3