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Tension Testing of Individual Collagen Fibrils

Submitted by Roberto Ballarini on

In a recent discussion it was suggested that it would be useful to perform tension tests on collagen fibrils. We have developed a MEMS-based experimental procedure that is capable of applying very large strains to individual collagen fibrils. The attached paper presents illustrative data; an upcoming paper will present much more data that illustrates the rich behavior of these fibrils during loading and unloading tests.

My new blog!

Submitted by cj042 on

This is the first scientific blog for me in English though I have had three others in Chinese. I hope it's a significant beginning for my new scientific stage! Communication with top scientists and openning my view are both important issues for me in future. To be a useful scientific dog is to do some innovational things!

ASME IMECE'08 Minisymposium on Recent Advances in Computational Materials Science and Multiscale Materials Modeling

Submitted by Caglar Oskay on

The  mini-symposium focuses on the link between the traditional materials modeling

and computational description of existing and new classes of materials, advanced and composite

materials and their applications. In particular, the mini-symposium is devoted to computational

characterization of material response and processing of material microstructures in the presence

of multiple temporal and spatial scales as well as multiple physical processes, and computational

Soil in ansys workbench

Submitted by Mina.M on

Hi everybody,

how can I define soil parameters just as cohesion and plasticity stress and strain of soil in "ansys workbench"?

I knew there is "drucker prager" model option in "ansys classic" to define these parameters but I couldn't find any option in "ansys workbench.

 

modeling a composite tube using ansys

Submitted by wissam hijazi on

hi everybody,

i am working with ansys and trying to madel  a composite tube i have chosen element "solid 46" the first problem i faced is in the "material model" "orthotropic material" i am working with 2d composite materials (plane stress) (i have Ex Ey Gxy)

in ansys for an orthotropic material we need to fill also Ez Gxz Gzy wich we dont have in plane stress .

also what system of coordinates should i use cartesian or cylindrical.

and for the mesh is it importsnt the kind of mesh or i can choose betwwn free and mapped.

Introduction to Cohesive Zone and Modelling DCB Test using Cohesive Elements

Submitted by craime on

I am currently working on a project to model DCB test in ABAQUS. My current problem lies in understanding cohesive zone modelling. I was wondering if anyone can forward me a couple of  materials regarding the introduction of cohesive zones?

 This would help me understand the material greatly and help me in modelling the DCB test.

 Another question in ABAQUS:  how do you implement the material properties for cohesive elements? in particular, what values should i be using for them? e.g. E, G1, G2?

Ferromagnetic, Piezoelectric & Magnetoelastic Plates & Shells Vibartions

Submitted by Alexander on

We are solved analytically and numerically by exact space treatment, proposed for elastic plates by Novatsky, the problems of determination of free vibrations of thin piezoelectric plates and shells frequences and mode comparision with Kirchoff theory, showing that in contrast to pure elastic case, the tables of frequences obtained by space treatment and by hypothesis are quite different. During last eight years you obtained the some results for magnetoelastic and ferromagnetic thin plates and shells, almost for all cases it is shown that Kirchoff hypothesis is not applicable.