Recently, there have been many strain gradient theories that are used for the interpretation of size effect at the micron and submicron length scales. The basic idea of these theories is the introduction of a first, or second (or both) gradients of strain or any internal state variable in the governing equations of classical theories.
Recent experiment have shown the size effect of the materials, when the characteristic length associated with non-uiform plastic deformation is on the scale of micros.The classic plasticity theories can't explain such phenomenon as their constitutive models posses no intrinsic length scale. The new models which contain strain gradient plasticity now are used to explain the experiment.
Computational Mesomechanics of Composites, by Leon Mishnaevsky Jr. (Risoe National Laboratory, Technical University of Denmark)
Invitation to join the Google group Mechanics: Modeling, Experimentation and Computation
The linked two of my studies can be used as references for Zhigang’s lecture on Instabilities.
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.
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.
<>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. <>
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.
