Compositional patterning in coherent and dislocated alloy nanocrystals
Variations in the distribution of the alloy components can significantly influence the electronic properties
of self-organized alloy nanocrystals. Using a combination of finite element and quadratic programming
optimization methods, we have developed an efficient numerical technique to compute the equilibrium
composition profiles in coherent and dislocated nanocrystals. We show that the variations in composition
profiles arise due to the competition between chemical mixing effects and the relaxation of composition-
dependent mismatch strain as well as strain due to dislocations. We find that the composition profiles
Comparison of intrapore velocities measured and simulated in the highly macro-porous biscayne aquifer
Using the data from 3D hybrid lattice boltzmann code under parallel environments, some interesting simulated results are obtained by using Tecplot.
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Water diffusion and fracture behavior in nano-porous low-k dielectric film stacks
Among various low-dielectric constant low-k materials under development, organosilicate glasses
OSGs containing nanometer-size pores are leading candidates for use as intrametal dielectrics in
future microelectronics technologies. In this paper, we investigate the direct impact of water
diffusion on the fracture behavior of film stacks that contain porous OSG coatings. We demonstrate
that exposure of the film stacks to water causes significant degradation of the interfacial adhesion
Symmetry breaking, snap-through, and pull-in instabilities under dynamic loading of microelectromechanical shallow arches
Arch-shaped microelectromechanical systems (MEMS) have been used as mechanical memories, micro-relays, micro-valves, optical switches, and digital micro-mirrors. A bi-stable structure, such as an arch, is characterized by a multivalued load deflection curve. Here we study the symmetry breaking, the snap-through instability, and the pull-in instability of a bi-stable arch shaped MEMS under static and dynamic electric loads.<!--break--> Unlike a mechanical load, the electric load is a nonlinear function of the a priori unknown deformed shape of the arch.
Free Size-limited Version of ADINA!
We are offering a free size-limited version of the ADINA finite element analysis software widely used for solving linear and nonlinear structural, heat transfer, CFD and multiphysics problems.
To request your free copy please visit:
Light Activated Polymers
Soft active materials have received increasing interests recently. Here, soft materials can broadly refer to polymers, elastomers, hydrogel gels. Active materials mean that these materials can respond to external stimuli. Examples of soft active materials include shape memory polymers, environmentally responsive hydrogels, liquid crystal elastomers, etc.
Effect of constraint on swelling of hydrogels and formation of surface creases
Inspired by recent works by Wei Hong , Xuanhe Zhao, Zhigang Suo, and their coworkers, we started a project on hydrogels, with particular interest in various instability patterns observed in experiments. The attachment is our first manuscript on this subject. Through this work we hope to achieve the following:
Postdoctoral Researcher Position in Computational Material Science
A postdoctoral research position in developing first-principles based multiscale modeling of Li ion batteries is available immediately at the Richard G. Lugar Center for Renewable Energy in Indiana University-Purdue University Indianapolis (IUPUI). The candidate will work on a project on developing and applying multiscale simulation approach to modeling the material processes occurring in Li-ion rechargeable batteries. This project involves close collaborations with the experimentalist scientists.
Analysis of Torsion-Bending of Laminated Composite Beam by FEM using ANSYS
Hi everyone!
i'm a researcher at the Deparment of Mechanical Engineering of University of the Philippines-Diliman. currently, i'm working on completing my thesis for my MS degree. my research area in general is in mechanics of composite materials (fiber-reinforced). my problem is that of formulating the FEM solution to the torsion-bending of laminated composite beam having orthotropic layers.