×
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

Time period problem in hot torsion simulation

Time period problem in hot torsion simulation

Time period problem in hot torsion simulation

(OP)
Hi to everyone,

I'm trying to simulate the torsion (360 degree) on a specimen. I have the flow curve at hot temperature (900° constant) at strain rate=0.1. So I edit the material section of the model and I set the elastic behavior (Young modulus and Poisson ratio) and plastic behavior (yield stress and plastic strain). In the plastic section I put the data with the toggle on strain rate dependent and I set 0.1. My question is: the time period is equal to time necessary to perform one rotation in the experiment?

RE: Time period problem in hot torsion simulation

Short answer is yes.

RE: Time period problem in hot torsion simulation

(OP)
Ok thank you for the answer!

RE: Time period problem in hot torsion simulation

(OP)
For example with strain rate=0.1 I have a time period of 11s, which could be an reasonable initial increment size?

RE: Time period problem in hot torsion simulation

Assuming that you are running Implicit..I would initially run the simulation for a total time step of 1 second with a initial time increment of 1E-3 and a minimum time increment of 1E-6. Depending on the deformations, the time step would adjust itself through the simulation. The simulation would give you problems if the time increment hits the minimum, at which time you can change the time increment settings. If the job runs fine, and is not taking a lot of time, I'd increase the total time step to attain the desired amount of twist.

RE: Time period problem in hot torsion simulation

(OP)
Thank you so much!

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