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Journal Club September 2010: Modeling the Mechanics of Cellular Membranes

Submitted by Alexander A. Spector on
research
adhesion
bending
tension
viscoelasticity
electromechanical coupling
biological cell

Constitutive relations, 2-D vs. 3-D. The starting point for modeling cellular membranes is the constitutive relations in 2-D space. It is important to set up the corresponding equations directly in two dimensions rather than to consider them as an asymptotic limit of three-dimensional relationships, like it is done in the shell theory. The main reason for the direct 2-D relations is that 3-D continuum approaches are not applicable to membranes whose thickness in on the order of magnitude of the dimension of a single molecule.

Help Modelling Material in Abaqus

Submitted by drestr21 on

Hello All




I need to model a material in Abaqus that when I load the piece, the
material behaves with an Elastic modulus and when I unload the piece the
material behaves with a different Elastic modulus but don't recover all
the strain when the stress is released.




Enclosed you can find the behavior that I want to model.




Any ideas??




Thanks in advance.


David

Postdoc position at MIT: Thermal and mechanical properties of nanocomposites

Submitted by Markus J. Buehler on
research
interface
molecular dynamics
graphene
metal
thermal
postdoctoral position
Mechanical
nanocomposite
atomistic

A postdoctoral associate position at MIT is available immediately,
focused on the analysis and development of multifunctional thermal
management structures, by using theoretical and atomistic multiscale
modeling and simulation. This project specifically involves calculations
of thermal and mechanical properties of graphene based metal- and
polymer nanocomposites, with a focus on various aspects such as
interfacial transport properties, tunability, mutability and phonon
engineering. Additional aspects of the project relate to the general

pin forces in ANSYS

Submitted by kameshwarang on
software

hi all,

i am doing static analysis on a pick and carry crane, i need to find the pin forces. for this i created entity set with the nodes where the forces are to be derived and ran a static analysis in ansys.In order to derive the forces , i first picked the entity set and then applied the nodal loads from the list result options. the result that i got was not fine. it states there was zero forces on the pins, but its not.i need to find the pinforces, so kindly let me know , how to do it.

 

thanks

kamesh.G

Nancomposite textbook for undergrads ? recommend me one.

Submitted by Chris W Smith on
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
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.

Eulerian Mesh for Modelling Solid Mechanics !

Submitted by Anonymous (not verified) on

 

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,

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