×
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

Changing Material Properties

Changing Material Properties

Changing Material Properties

(OP)
Hello,
I am currently adapting an already existing Abaqus Model of an Additive Manufacturing process that includes a moving heat source along a substrate. The current model (190 different load steps) uses the temperature dependent properties of Ti-64 and runs completely within a day. When I change the material properties to another material of interest (IN718), the simulation runs much slower sometimes taking days to get only to step 20. I am assuming that the reason for this is due to the initial time step (about 1e-7) that I specify for each load step or possibly because of the DELTMX that I specify (DELTMX=200). Each step in the new simulation takes about 2000 increments to complete, but the Ti-64 model only takes about 20-40 for each step. I am expecting high thermal gradients and high cooling rates, but I need the simulation to be able to run quickly a I have a lot of simulations to run. What should I try to do to reduce my run-time?

Thanks.

RE: Changing Material Properties

(OP)
The initial time step is so small because each time step is very small, sometimes only fractions of a second. The entire simulation only covers a couple of seconds of transient behavior, so each time step is very small. Unfortunately, I do not have access to a cluster at this time, so I'm trying to do everything I can do to minimize the time on my workstation. Thanks.

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