research

Poroelastic relaxation indentation of thin layers of gels

Submitted by Yuhang Hu on Fri, 09/16/2011 - 11:52

vlassak_group_research

film

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

Submitted by balavenkatesh on Thu, 09/15/2011 - 12:27

research

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

Submitted by C Amss on Thu, 09/15/2011 - 03:24

research

solid mechanics

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

Submitted by bipiniitd18 on Wed, 09/14/2011 - 06:16

research

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

Submitted by hrbeu221 on Tue, 09/13/2011 - 20:04

research

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

Submitted by mrrahimi on Tue, 09/13/2011 - 13:28

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research

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

PDF and PhD Positions at Simon Fraser University

Submitted by Nimal Rajapakse on Sun, 09/11/2011 - 20:09

research

I am looking for a post-doctoral fellow and two PhD students. The research projects are concerned with electromechanical performance of PZT actuators in hydrogen-based fuel injectors (PDF), modeling of fuel cell membrane durability (one PhD) and nanoscale mechanics (one PhD). Interested applicants are asked to send their CV and transcripts to: Dr. Nimal Rajapakse, Dean, Faculty of Applied Sciences, Simon Fraser University, Burnaby, Canada.

International Journal of Applied Mechanics (IJAM) Vol. 3 No. 4

Submitted by zishun liu on Sun, 09/11/2011 - 14:27

Forthcoming papers of International Journal of Applied Mechanics (IJAM) Vol.3 No.4:

Discontinuous Galerkin FEM

Submitted by setareh on Sat, 09/10/2011 - 16:59

research

Discontinuous Galerkin FEM

Can some of you recommend a source to learn about Discontinuous Galerkin FEM?? I am specifically interested in its application in geomechanics but I need to learn the basics first!

Mechanics for soft machines

Submitted by Zhigang Suo on Sat, 09/10/2011 - 13:40

I gave a seminar at Xian Jiaotong University on 27 October 2009. I recently found the video of the seminar online. The seminar was in Chinese, but the slides were in English.

If the subject interests you, the following papers will lead you to the literature.

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