×
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

Moment in Ansys wb

Moment in Ansys wb

Moment in Ansys wb

(OP)
Hi All,
i am bit confused with applying moment in a solid model with 3D solid elements.i am using ansyswb,i read that solid elements like(solid 186) doesn't have rotational deg of freedom,so i am trying to apply force at a distance.is this right way of approach?

if the above statement is true,then moment icon in ansyswb can be only used to apply moment on the shell and beam elements is that right?

Thanks
Regards
Badri07

RE: Moment in Ansys wb

Hi,
no, it is a "macro launcher" which internally turns out to apply a moment on a pilot node connected to the "scope" via MPCs. This can be done whatever the dimensionality of the elements involved.
As you have already thought, an equivalent method is to apply a force at a distance. However, internally WB will do exactly the same thing: apply the force to a pilot node connected to the "scope" via MPCs.
Why is it behaving like that and not in an easier manner? Because, in this way, just varying the type of MPCs will allow to vary the way in which the force / moment is transfered ("rigidly" or not).
Regards

RE: Moment in Ansys wb

(OP)
Hi Cbrn,
Thank you for your post,yes i just looked at the ansys wb output file and it looks to be consistent with what you are saying.
so,can i take it as applying force at a distance is the best way to replicate a moment,and the same method can be applied to any element mesh.

Thanks
Regards
Badri07

RE: Moment in Ansys wb

Hi,
well... "the best way": no, I don't think so. If and when you have the opportunity to use it, and whenever you have input values expressed as torques, why make the effort to "decompose" the torque to a force at a distance? Things are different if you do have input values expressed as force+eccentricity.
Be careful: in some types of analyses, Ansys doesn't like very much the simultaneous presence of a force AND a torque on the SAME "scope" object, so the way out is... "force-at-a-distance" !

Regards

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