Instabilities in Material Behaviors
The linked two of my studies can be used as references for Zhigang’s lecture on Instabilities.
research
The 2007 Melosh Medalists
The 19th Annual Melosh Competition for the Best Student Paper in Finite Element Analysis was held last Friday, April 27, at ETH Zurich. Two medalists were selected this year from the six finalists. The 2007 Melosh Medalists are Vikram Gavini, from Caltech, and Michael Hain, from Leibniz University, Hannover.
XFEM in fluid saturated medium
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Hello!
To describe the crack propagation in a fluid saturated solid I have idea
to combine the Strong Discontinuity (XFEM) with the fluid, but at the micro-scale, which probably means to use (Navier-)Stokes equations or some modification of them.
XFEM in fluid saturated medium
<>To describe the crack propagation in a fluid saturated solid I have idea to combine the Strong Discontinuity (XFEM) with the fluid, but at the micro-scale, which probably means to use (Navier-)Stokes equations or some modification of them. <>
Thermal Diode
Hi everyone,
We are looking for the practical solutions for building a thermal diode using nanocomposites. A thermal diode allows the heat flow from one end to the other, but it inhibits the flow in the opposite direction. There are some simulations and theoretical work in this regard. Does anyone know any experimental work related to this matter? Thanks.
Journal Club Theme of May 2007: Experimental Mechanics of Nanobuilding Blocks
Welcome to the May 2007 issue. This issue focuses on experimental nanomechanics of nanobuilding blocks. The extremely small dimensions of nanobuilding blocks (for instance, nanoparticles, nanotubes, and nanowires) have imposed great challenges to many existing instruments, methodologies, and even theories. In this issue, we will discuss – (1) experimental techniques and (2) size-effects.
Super stretchy carbon nanotubes
Huang et al., PRL 98, 185501 (2007)
Watch movies at: http://netserver.aip.org/cgi-bin/epaps?ID=E-PRLTAO-98-002719
We report exceptional ductile behavior in individual double-walled and triple-walled carbon nanotubes at temperatures above 2000 C, with tensile elongation of 190% and diameter reduction of 90%, during in situ tensile-loading experiments conducted inside a high-resolution transmission electron microscope. Concurrent atomic-scale microstructure observations reveal that the superelongation is attributed to a high temperature creep deformation mechanism mediated by atom or vacancy diffusion, dislocation climb, and kink motion at high temperatures. The superelongation in double-walled and triple-walled carbon nanotubes, the creep deformation mechanism, and dislocation climb in carbon nanotubes are reported here for the first time.
Surface roughness evolution
With a shallow chemical etching the roughness with spatial frequency below a critical value grows while the roughness of higher frequency decays.
Aerodynamics/CFD research
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Hi,
i am a student of mechanical engg from india . Am a aerodynamics/computational enthusiast .
can someone tell me what are the current research topics in this field ..
Adhesion in viscoelastic contacts
Yesterday I had the distinct pleasure of seeing a mechanics seminar delivered "tag-team" by Ken Johnson and Jim Greenwood. (I know several people have thought I was a bit mad for jumping "across the pond" but there are really some amazing benefits of being part of the Cambridge Engineering faculty!)