×
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

Reaction moment/Free body moment question

Reaction moment/Free body moment question

Reaction moment/Free body moment question

(OP)
See attached .jpg's.  I have a part with a fixed constraint on the cylindrical face and applying a normal force of 5 lbf. on the extreme edge of the handle (see setup). The handle is 8 inches from the edge to the center of cylinder, therefore inducing a 40 in-lb torque around the axis.  When I view the results for either reaction moment or free body moment I get the following (see list results).  I have tinkered with all the options to get the result of 40 in-lb on the axis, but no luck.  Any suggestions on what I'm doing wrong?

Thanks in advance

RE: Reaction moment/Free body moment question

Looks like all you did was constrain the cylindrical face to be fixed.  This would not yield a torque around the axis.

Constrain the face relative to the axis with zero rotation or axial movement.

RE: Reaction moment/Free body moment question

I ran this on my own.  The results you get are consistent with a fixed constraint.  Change the constraint to "Use Reference Geometry" w.r.t. the axis, and constrain all 3 DOFs (radial, axial, rotational).

RE: Reaction moment/Free body moment question

w.r.t. = "with respect to"

RE: Reaction moment/Free body moment question

(OP)
Tick,

Can you send me a screenshot of how you are setting this up and the results screen?

Thanks.

RE: Reaction moment/Free body moment question

(OP)
Tick,

Thanks for attaching the part.  I still can't get the results I'm expecting under reaction force.  Still looks like the list results .jpg I first sent.  I dunno....

Thanks for your help.

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