Ansys - Young Modulus vs time

[jonathas_salles]

I need to simulate a degradation of Young Modulus in a time. I need to use a equation to simulate the Young Modulus, for example E = E0 - D*substep/(total of substeps), where E0 = Young Modulus without degradation and D = percentual of degradation.

I'm using a concrete structure in the program ANSYS.

Can someone help me? My English is terrible, sorry!

[dindu86]

Hi,
I also have a similar prob. I am trying to do concrete creep modelling and it requires inputting a time varying Young's modulus in ANSYS.. Did you find a soulution to this?
And can you please help me if so...
Thanks in advance,

I need to simulate a degradation of Young Modulus in a time. I need to use a equation to simulate the Young Modulus, for example E = E0 - D*substep/(total of substeps), where E0 = Young Modulus without degradation and D = percentual of degradation.

I'm using a concrete structure in the program ANSYS.

Can someone help me? My English is terrible, sorry!

[Jorgen]

It is not a good idea to specifying a time-varying Young's modulus.
I instead recommend using one of the CREEP models in ANSYS.

-Jorgen

[dindu86]

Hi,
Thanks for the reply Jorgen. Actually I should have given a bit more details about it.
I am using the Usercreep files in User programmable features to establish the concrete creep
equations. But the concrete creep is given as a fraction of the elastic strains. Hence using the
elastic stains calculated by the main ANSYS programme. So need to put the time varying E when calculating the
elastic stains as well.
Do you have any suggestions for this?
Thanks again.

[Jorgen]

I am not sure how you would create a time varying E in ANSYS (and also, I an still not sure why you trying to do that).

-Jorgen