×
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

Infinite Boundaries for Beam Vibration Problem

Infinite Boundaries for Beam Vibration Problem

Infinite Boundaries for Beam Vibration Problem

(OP)
Hello all,

I'm working on observing wave propagation in an aluminum beam, specifically their interaction with cracks.  However, my data is being "corrupted" somewhat by the reflections from the fixed boundary conditions at the end of the beam.  If possible, I would like to have no reflections from the ends of the beam.  From what I gathered in the ABAQUS users manual, the way to do this is to use infinite elements (CIN3D8 is what I've been trying to use).  However, I am in ABAQUS/CAE, which does not have infinite elements, so I've been modifying the .inp file to change the element type to CIN3D8.  However, this has been producing errors related to my time step increment.

Is there an easier way to produce a "quiet" boundary that does not produce reflections?  If I make the beam longer, it takes much much longer to run the simulation, so a short section near the crack with quiet boundaries would really be optimal.

Thanks in advance!

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