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Department of Civil, Environmental, and Architectural Engineering
University of Colorado, Boulder

The research objective is to establish an ultrastructurally-based computational finite element model of the ocular lens subjected to dynamic loading to attempt to better understand the mechanisms of traumatic cataract formation and how it may be treated clinically.

Hi, Every one i am student doing my masters and i have got the
experimental result from tensile test for different temperature stress vs strain and orthogonal cut .
but i am going to apply the Johnson cook material model. please can any
one give me how to find A,B,C,N and M please i have read it found from
the experimental data i have got but i didn't know how to find please
help me out. please attach me the steps in detial with my emial: monzerdaoud@hotmail.com

any sort of help is appreciated

Hello everyone,
I am studying fracture of polymer composites.
I had a question I want to relate fracture toughness of composite to the composite stress-strain curve found from simple tensin test(on samples with no notch or pre-existing crack), can anyone give me a hint , how to do it?

DEAR everyone :

    I want to  combine XFEM and UMAT(about concrete) in ABAQUS,I have some questions about this ,concrete is a Special materials and I have the Constitutive equation about concrete ;Can I use the new constitutive equation and  simulate mixed CONCRETE cracking by XFEM(UEL_XFEM) in ABAQUS,how to combine UEL and UMAT in abaqus, thanks in advance,or you can Recommend  some relative infomation for me  

Dear everyone,

I created 3D-FE- model in Abaqus, but I don’t know how to see the element inside 3D model.

I want to check if I mesh the model properly after meshing the model.

Could anyone please suggest me how I can solve this problem?

All I know is that we can see the results in each element inside the model by using view cut in Visualization-module, but I don’t know how to make Abaqus show the element or areas inside the 3D model in Mesh-module (or Part-module).

Thank you very much indeed,

Sutham A.

Hi

  I have problem in Abaqus for crack propagation using cohesive zone approach in 3d for my research work 

1. assuming to exist a PDE describing an equilibrium along one direction (e.g., postive direction along X coordinate), A+B=0;

2. after normalization process to the above PDE, we got, A*+(C)B*=0;

3. (C)=B/A, is the dimensionless number, and obviously, (C) implicits that both two effects arising from A and B are the same in the direction, i.e., along the X positive coordanate;

I have made video For explanation of cam follower prototype for clean energy cheaper than coal. You can find more information about my prototype at http://mechanicalresearch.info/

hello ,

i need simples codes MATLAB

in cohesive crack  under static  or dynamic load

 The Simplex K with 4 Vertices in Dimension 3 is a Tetrahedron and :

 K = determinant((x2-x1) , (x3-x2) , (x4-x3) ; (y2-y1) , (y3-y2) , (y4-y3) ; (z2-z1) , (z3-z2) , (z4-z3))

 The Volume of this element is :

 V(K) = abs(K) / 3! 

 If V(K) ~= 0  then K is Nearly Degenerated

 Moussaoui

Dear Abaqus user

I am modeling a post-tensioned concrete pier with 4 part:

-concrete foundation,pier,cap(C3D8R) and tendon(wire,B31)

 I input prestress force by predefined file,stress in initial step.The first step is static,General to find equilibrium.

 I embeded the beginning & the end of wire in foundation & cap. contact between (foundation,pier) & (pier,cap) is hard normal contact and the tangential behavior is penalty.

hi, I am working on soil modeling  and facing problem on defining erosion property of soil, please help me for defining erosion property of soil

 thankn you 

Dear Colleagues:

We are organizing a track entitled "Mechanics of Multifunctional Materials" at PACAM XIII (May 22-24, 2013, Houston) (http://www.conferencetoolbox.org/PACAMXIII/CallForPapersDetail.cfm).  The tentative submission deadline is Jan 15, 2013.  Below is a brief description of the track.