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Hi

i have to model a graphite/epoxy [0/+-45/90]2s composite laminate using ansys. can anyone please help me how to model it, as i m using ansys 4 the 1st time and dont know how to model a composite.

waiting 4 an early response

regards

Khan

Dear  Friends

I've 2 questions:

1) I use abaqus cae for concrete modeling and how can I attech a file (subroutine/etc.) to my model?

2) which category I should use for concrete while making a part(shell/solid)? while I'm trying to make a section , only shell section have a rebar layer and solid section dont have this option! what should I do?

Regards

Meisam M.

I'm an undergraduate who has just completed the Mechanics of materials Course.I'm still confused about what happens at the yield point.In the stress strain curve how does the strain increase accompanied by a decrease in stress?can u please throw light on this small confusion of mine?

Hi everyone

I want to use Abaqus Implicit UMAT with K&C model to modelling concrete behavior .

As I know, when using Implicit, we have to update Jacobian stiffness matrix.

Is there anyone can help me? Please show me how to establidh and update stiffness matrix for K&C model.

Thank you very much,

Zon Dol 

Hello to everybody

I want to detect strain localization in geological materials and follow the path and the way that shear band propagate in seismic condition, so I want to know is there any meshfree commercial package to handle dynamic nonlinear analysis for geological materials specially rock and soil. Does exist Even a good source code that i improve it (not so much) and make it effecient for my purpose ?

I appreciate anyone help me and give me information in such field.

Truly

Babak

I have come accross an equation of the form ∂²u/∂x² + ∂²u/∂y² - K² u =0 with the following conditions. y ≥αx,y ≥-αx, x=H.How to solve this equation?.analytically.

Hi all,

I'm looking for an efficient solver written in Fortran (preferably fortran 90 or later versions) to solve unsymmetric system of equations using finite element method.  I've an in-house FE code which lacks an efficient unsymmetric solvers (like skyline and sparse solvers). I found some symmetric solver subroutines online, but couldn't find any for unsymmetric case. Any suggestions and recommendations will be much appreciated.

Karma