F.B.D. for beam on disabled hoist (confirmation on work needed)

  • Thread starter Thread starter LauraR
  • Start date Start date
  • Tags Tags
    Beam Hoist Work
Click For Summary

Homework Help Overview

The discussion revolves around the creation of Free Body Diagrams (FBDs) for a beam in the context of designing a disabled hoist. The original poster seeks confirmation on their work related to static equilibrium and bending stress calculations.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • The original poster attempts to apply static equilibrium principles and expresses uncertainty about their FBDs. Some participants question the inclusion of the beam's weight and its impact on shear and bending diagrams.

Discussion Status

The discussion is ongoing, with participants exploring different aspects of the problem. Some guidance has been offered regarding the treatment of additional forces, but no consensus has been reached on the overall approach or correctness of the original poster's work.

Contextual Notes

The original poster notes difficulty in grasping FBDs and is working under the assumption that the system is static. There is mention of attached images for reference, but the specifics of those images are not discussed in detail.

LauraR
Messages
3
Reaction score
0

Homework Statement



Hi guys,

I'm doing an assignment for college and designing a disabled hoist. I want to complete FBDs on the top beam especially. Can anyone help answer whether the work I've done is correct?

Homework Equations



the equations I used were the sum of all force = 0

and for the bending stress that the shear force = dm/dx

The Attempt at a Solution



Please see the two pictures attached for my attempts at (very quickly) drawing what i believe to be the correct solution. I'm taking the hwole thing to be static, as in the linear actuator is creating a force opposing the Load F. I would really appreciate some feedback, because I find F.B.D's hard to grasp, and I could be totally wrong!

Thanks
L

 

Attachments

  • top beam FBD.JPG
    top beam FBD.JPG
    6.4 KB · Views: 405
  • sheer and bending D.JPG
    sheer and bending D.JPG
    4.5 KB · Views: 474
Physics news on Phys.org
Can anyone shed any light on this?
 
What about the weight of the beam?
 
How would I incorporate w into a shear diagram? Would it effect it? I understand w is another force acting on the beam and will put it in the top FBD, but I don't know what to do for the Shear and bending diagrams.

Thanks
 
It's just another force. Treat it like you did the other forces.
 

Similar threads

Homework check - Mohr's circle & Shear stress in I beam
  • · Replies 1 ·
Replies
1
Views
2K
Shear Force in an I-beam question
  • · Replies 2 ·
Replies
2
Views
1K
As Simple Hoist System Problem - Given Answer Wrong?
  • · Replies 2 ·
Replies
2
Views
3K
Torsion and stress on a beam question
  • · Replies 9 ·
Replies
9
Views
2K
What Forces Affect an Electron in a Particle Accelerator?
  • · Replies 1 ·
Replies
1
Views
2K
Beam calculation with 3 unknowns
  • · Replies 5 ·
Replies
5
Views
3K
Force between two charged particle beams -- proton and electron beams
  • · Replies 3 ·
Replies
3
Views
1K
How Far Does a 3.5 Mg Engine Hoist in 4 Seconds?
  • · Replies 3 ·
Replies
3
Views
3K
Vibration of a cantilever beam problem
  • · Replies 2 ·
Replies
2
Views
2K
Solving Balancing Beam: m1, L1, m2, L2
  • · Replies 13 ·
Replies
13
Views
4K