research
Source truncation and exhaustion: Insights from quantitative in-situ TEM tensile testing
‚Source truncation and exhaustion: Insights from quantitative in-situ
TEM tensile testing' by D. Kiener and A.M. Minor (http://dx.doi.org/10.1021/nl201890s).
Damping of multi-layer composites
We recently published two papers that present an optimization method to design multi-layer composites with damping properties. The method consists in adding elastomeric layers in the composite. In this way, a multi-criteria optimization tool has been developed to determine the best geometrical and material properties of the composite: position of the elastomeric layers, layers thickness, ...
Free Computation Cycling Time
National Nanotechnology Infrastructure Network Computation (NNIN/C) Project at Michigan provides free computation cycling time for a limited time (Sept. 15, 2011 to Jan. 15, 2012) to support researches in Nanotechnology (Nano/Microsystems, Nanomaterials, Multiscale modeling, etc). To get a free computation account, please go to:
Poroelastic relaxation indentation of thin layers of gels
We develop a method of poroelastic relaxation indentation (PRI) to characterize thin layers of gels. The solution to the time-dependent boundary-value problem is obtained in a remarkably simple form, so that the force-relaxation curve obtained by indenting a gel readily determines all the poroelastic constants of the gel—the shear modulus, Poisson’s ratio, and the effective diffusivity. The method is demonstrated with a layer of polydimethylsiloxane immersed in heptane.
Impact Analysis using ANSYS/LS-DYNA
Hello sir,
I'm working on high velocity impact analysis of solid particle
erosion, in which i have to simulate the impact of particle on the
target.
I modelled the target as rigid and the particle as bilinear kinematic mat model...
I gave initial velocity and acceleration for the particle.
The surface to surface automatic contact is used
3D element of soid 164(8 node hex elems) are used...
Acta Mechanica Solida Sinica, Vol 24 issue 4 online now
Dear colleague,
The fourth issue in 2011 (Volume 24, Issue 4) of Acta Mechanica Solida Sinica (AMSS) is now online.
Welcome to this SCI-indexed journal <http://ees.elsevier.com/camss/> for rapid publication of your exciting results.
_______________________________________________________________________________
Viscoelasticity
hi,
I have to do stress relaxation of fabric under stress condition. For this I have assumed my fabric as orthotropic material.
I need to find a stress relaxation on fabric under stress condition. Can anyone suggest the procedure to solve this analysis in
ANSYS.
Thanks
BIPIn
draw mode shape with matlab
if M is your mass matrix and K is the stiffness matrix, use
[phi w2]=eig(K,M);
phi contains the eigenvectors (each column is a modeshape)
w2 is a diagonal matrix, each diagonal entry contains wn(i)^2
(i.e. the i'th natural frequency squared).
Then how to draw the mode shape with eigenvectors?
Thank you.
wrong Numerical calculation in ABAQUS
Forums
Choose a channel featured in the header of iMechanica
Hey Guys,
I have a problem on integrating process in ABAQUS.
in a very simple problem, I applied time history of acceleration as a boundary condition and got displacement of that boundray. Then I applied that time history displacement on the same boundray to reach same acceleration. But they were different.
Anybody knows what's the problem and how I can solve that?
Thanks all in adavance,
Reza
PhD candidate,
Civil Engineering Department
The university of Akron