×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Ice-strengthened joint in Abaqus (with temperature change)

Ice-strengthened joint in Abaqus (with temperature change)

Ice-strengthened joint in Abaqus (with temperature change)

(OP)
Hi
I have to simulate a shear test conducted on a sample containing two pices of rocks with thin layer of ice in-between.

This ice-strengthened joint has high shear strength parameters (i.e. typically C, friction) at low temerature. However, the temperature is not constant (it changes during the test) and consequntly ice tend to change phase at some locations.

Is there any way to simulate this process using Abaqus package? in particular I need to know how possible to change the shear strength parameters with time and water pressure?

thanks for you help answering my question...

RE: Ice-strengthened joint in Abaqus (with temperature change)

You need to use a UMAT subroutine, good luck, I don't understand them!!

RE: Ice-strengthened joint in Abaqus (with temperature change)

If you model the ice as a standard material you can of course vary its mechanical properties as a function of temperature. Presumably, that is not enough. Do you have to model stick and slip of the frictional interface between the ice and joint? There is a user subroutine FRIC. I've never used it though.

By the way, in "i.e. typically C, friction)" what is "C"?

MRG

RE: Ice-strengthened joint in Abaqus (with temperature change)

(OP)
Gwolf and MRG,
Thanks for the comments.

(sory..my reference of 'C' means cohesion).

I think there is no way except to use subroutine. But what is the diffrence between FRIC and UMAT subroutine?

RE: Ice-strengthened joint in Abaqus (with temperature change)

UMAT deals with material properties, FRIC deals with frictional properties, I have a horrible feeling that you may need to use both. This is a whole world of pain!!!

Try thinking about what's really happening physically in your analysis, you may find that it is possible to model the important effects using the more conventional ABAQUS properties rather than a sophisticated approach.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources