Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

Register Log in
  • Congratulations SDETERS on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

ROD Forces direction

Xprivate

Xprivate

Aerospace
May 26, 2023
55
Hi Everyone, i have a model with rod element, one end connected to the structure and the other end of the rod is fixe. when the solution is run, i get the rod Force and the resultant at the constraint same. but i dont understand why the resultant vector on the fixed end do not align along the rod axial direction. can anyone tell me the reason for it ? Thank you in advance 1742310516102.png1742310547072.png
 
Replies continue below

Recommended for you

Sort by date Sort by votes
SWComposites said:
is the nodal coordinate system aligned with the rod axis?
Click to expand...
nope its not aligned , its oriented w.r.t to global. whether its local or global , i was expecting the resulting force vector to be along the rod axial direction since there is not component. What am i missing in this interpretation ? . THanks SWcomposites for your response
 
Upvote 0 Downvote
it could be a plotting issue, or a coordinate system issue.
have you checked the actual nodal force components?
you are using FEMAP, what solution code are you using - Nastran?
 
Upvote 0 Downvote
SWComposites said:
it could be a plotting issue, or a coordinate system issue.
have you checked the actual nodal force components?
you are using FEMAP, what solution code are you using - Nastran?
Click to expand...
i changed multiple CSYS, there is no effect in the direction it is plotting the resultant. I am using FEMAP simcenter Nastran for SOL
 
Upvote 0 Downvote
Dear Xprivate,
Please share the FEMAP (*.modfem) model here and we can take a look to it.
One thing is the resultant internal axial force, and another the reaction forces at the constrained end, this is dependent of the applied loads to the structure.
Best regards,
Blas.
 
Upvote 0 Downvote
BlasMolero said:
Dear Xprivate,
Please share the FEMAP (*.modfem) model here and we can take a look to it.
One thing is the resultant internal axial force, and another the reaction forces at the constrained end, this is dependent of the applied loads to the structure.
Best regards,
Blas.
Click to expand...
Hey Blas, thank you for your response, you are right my reactions are aligned with respect to the applied load. So it does not necessarily have to be aligned along the rod axial, unless the applied load is actually along the rod axial. Thank you for turning the bulb on inside my brain. Cheers !
 
Upvote 0 Downvote
I too think it is a plotting issue. To confirm, create a CID aligned to the rod, output the ROD results in this CID. If it is a ROD, then the force is axial ... Has to be.
 
Upvote 0 Downvote
You must log in or register to reply here.

Similar threads

LeonardoBer
  • Locked
  • Question
Glue forces output request in Femap
Replies
6
Views
556
LeonardoBer
LeonardoBer
VH88
  • Locked
  • Question
Create Rod Element
Replies
0
Views
196
VH88
VH88
jonny1230
  • Locked
  • Question
Reaction forces on Cylindrical Composite Tube
Replies
5
Views
283
jonny1230
jonny1230
John1991_09
  • Locked
  • Question
Need help aligning plate and rod elements.
Replies
6
Views
614
BlasMolero
BlasMolero
Tuman_1232
  • Locked
  • Question
CBUSH - large forces
Replies
2
Views
221
FSB1
FSB1

Part and Inventory Search

Sponsor

Back
Top Bottom