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


Drop test implicit method

Drop test implicit method

Drop test implicit method

Hi everyone,

I am trying to perform a drop test using "regular" ANSYS and transient analysis. I created a simple test model (horizontal plate supported by four beams on the top of which I "drop" a sphere). It worked. The spere hits the plate and rebonds. However, when I increased the mass of the sphere, at one point, the sphere goes through the plate. The sphere is the contact with initial velocity and the plate the fixed target. Is their anyway to increased the stiffness of the contact pair or should this problem be performed using LS-DYNA (which I don't have). The dropped object in the real model weights 5,000 lbs.



RE: Drop test implicit method

Eric, you'll have to use small time steps to ensure that Ansys sees contact. If you're using Workbench, try changing the time step options for your contact pair to "predict for impact". You may also try increasing the pinball region. Good luck.

Christopher K. Hubley
Mechanical Engineer
Sunpower Incorporated
Athens, Ohio

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!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close