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Any one help me out ,How to estimate stiffness matrix of beam  using modal experimental method?

Hi,

i'm in an internship, and i want to study the stress destribtuion with photoelasticity method, but my problem is that the material that i have is not homogenious but there ares two layers. I can do the measurement for the two material separated, but i dont know how to do that for my layared material.

 anyone have an idea about how to do photoelasticity measurement for multilayere materials ?

Thanks.

Dear all, 

Need Help.. 

I'm doing research in moisture absorption in adhesive bonding. I'm wondering how to differentiate and characterize the Fickian Diffusion and Non-Fickian Diffusion during absorption and desorption moisture.

Thank You 

Dear all,



The Significance of Alternative Energy towards Eco-Mobility Era

1st International Conference on Mechanical Engineering 2013 (ICOME 2013)



It is a pleasure to announce that the Department of Mechanical Engineering, FTI, Institut Teknologi Sepuluh Nopember, Surabaya, Indonesia is going to organize an "International Conference on Mechanical Engineering - ICOME 2013". The conference will be held on September 12-14, 2013, in Mataram, Lombok, Indonesia with its theme "The Significance of Alternative Energy Towards Eco-Mobility Era".

Hi,

I am new here and have a very basic question on the Strain Energy Density (SED) function of exponential model.

 This is the exponential model SED form : W=a(e^(b(I₁-3))-1)

Now we have certain postulates such as that

1.W=0 when there is no deformation and

2. stress=0 when strain =0.

 When there is no deformation I1=3 and hence W=0, which is correct.

Why do some strain energy density (SED) function have 1 invariant (like neo-Hookean) while some others have both 1st and 2nd invariant like mooney-rivlin? is there a specific reason behind using 1st invariant in SED vs all invariants in the SED?

N 

As a follow-up, here is a photograph of a (rather extreme) case of conductor fatigue.

Hi,

I am modeling a 3D simply supported beam in ansys using a SOLID95
element. In this case, how should I give
the B.C.s? Should I apply B.C.s to

1) the mid nodes on the edge of beam? or

2) to the entire edge? or

3)  just to the bottom nodes?

according to me, I have tried to use the various B.C case, but the
results are very different even though the nodes number taken in account
change slightly, and for all case, the result is not satisfactory with
my analytical solution. plz help.

 Thanks in avance!

For more information, please check out my homepage: 

http://www.engineering.uiowa.edu/~weifhu/index.htm