Dear all friends, I want to specif

[aliabolhasanpoor]

Dear all friends,
I want to specify the variation of the Elastic modulus as a function of the depth. I am told that this cannot be done directly but as has to be done indirectly using field variables. How does one do it?

I look forward to hear a positive response from you.

Kind regards

Ali

 

[akabarten]

Hi,

Please take a look for this thread:

http://www.eng-tips.com/viewthread.cfm?qid=295995

Never tried but I think it can be done also with out field variable and subroutine.
See documentation: Abaqus Analysis User's Manual, 2.8.1 Distribution definition

Regards,
Bartosz

VIM filetype plugin for Abaqus

https://github.com/gradzikb/vim-abaqus

 

[aliabolhasanpoor]

Dear Bartosz,

Thank you so much for your good response.

 

[mami826]

Hi akabarten,
As I search my issue in the net I found that you are expert and can help me to find the solution.I would greatly appreciate if you help me and get advice how can I modell density variation for vibration analysis in abaqus:

I post the following one and i have not received any reply:

http://www.eng-tips.com/viewthread.cfm?qid=407667

Hi All,
I am going to model density that is changing through the thickness for graded plates.
Before, I wrote UMAT to model variation of elastic modulus through the thickness and I solved my bending problem. But at this moments I want to add density to solve vibration as well.
I dont know how can I model that. I mean if I define the density as a function of z in UMAT how abaqus define density in its solution. because in UMAT, elastic modulus can be related to stress and strain but there is no calling for density.

I would greatly appreciate if you help me.
please see the attached file for UMAT for variation of elastic modulus for bending analysis