Blog posts

A Thermodynamic Model of Physical Gels

Submitted by Hanqing Jiang on Mon, 09/06/2010 - 13:52

Physical gels are characterized by dynamic cross-linksthat are constantly created and broken, changing its state between solid andliquid under influence of environmental factors.

Nancomposite textbook for undergrads ? recommend me one.

Submitted by Chris W Smith on Mon, 09/06/2010 - 13:08

education

textbook

nanocomposites

Dear All,

I've got to start teaching a masters level programme on nanocomposites, well 7 lectures worth of one anyway. It will serve as an introduction to NCs and briefly review the current stat of the art.

I would like opinions on textbooks to accompany such a module.

Any of you had any good experiences with any particular books ?

Thanks,

Chris

Experimental notch fracture testing to calculate KII

Submitted by laki on Mon, 09/06/2010 - 10:09

research

Stress intensity factor-K II mode

V-Notch

Hi,

I am doing a v-notch fracture testing (experimental) with opening angles from 0,30,60,90,120 to 150 deg and need to calculate KII. I need a equation that could be used to calculate KII for both 0 deg and also for non-zero opening notch angles. I am using TestResources machine to do this shear testing and I will get results in terms of load vs. d. The material is PMMA. What could be the appropriate displacement/min or load to break the specimen.

poisson's ratio of " graphite ek20 "

Submitted by omidomid on Mon, 09/06/2010 - 09:51

research

poisson's ratio of graphite ek20

Dear all

I'm looking for the poisson's ratio of "graphite ek20 ".

Best regards

Eulerian Mesh for Modelling Solid Mechanics !

Submitted by Anonymous (not verified) on Mon, 09/06/2010 - 09:47

In modelling fluid-solid interaction, it is more common to use a coupled Eulerian-Lagrangian mesh. It would be advantageous, in a way, to model solid through an Eulerian mesh to establish a unified mesh for the whole problem; however, the litrature seems to be poor (or at least to me after searching Google) in that area!

I know that Lagrangian meshes are better for modelling solids. Nevertheless, it should not be the only way or is it?

Would you please advise on Eulerian meshes for solid modelling?

Best regards,

INTERFACE FRACTURE IN ABAQUS

Submitted by surajmravindran on Sun, 09/05/2010 - 06:10

Hiii alll,

How can we calculate J integral of interface fracture. I'm trying to reproduce results of Hutchinson paper crack defection at an interface between dissimilar material. But while using VCCT im confused that what value i can give for crack growth parameter G1c, G2c..how can we get G1c and G2c for an interface, is it needed. Want to find the energy release rate of deflection at the interface. The material interface is of aluminium and aluminium oxide. Please do reply.Hope u understand my problem.

Thank you...

Flow stress

Submitted by Bastian Boe on Sun, 09/05/2010 - 04:35

Hello

I am working on a thesis project dealing with flow stress in cold rolling, a plane strain operation. To determine the flow stress, tensile tests were carried out. I am aware, that the engineering strain/stress hast to be transfered to the true strain/stress and then the true strain/stress from the tensile test has to be mulitplied with the Von Mises yield criterion to yield the correspondent compressive flow stress in the rolling situation.