Shear force in a frame due to torsion?

AI Thread Summary
The discussion centers on calculating the material strength required to prevent shear failure in a frame subjected to torsion from a motor-driven gear. The user seeks guidance on determining support reactions and material strength, noting that a load is also applied in the z direction. It is clarified that the problem is related to a project rather than homework. The response suggests that the induced shear stress at each plate connection is half of the shear stress calculated for a shaft of similar dimensions using standard equations. Understanding these calculations is crucial for ensuring the frame's structural integrity under torsional loads.
boganaut
Messages
2
Reaction score
0
joint1.jpg

The orange thing is a gear being turned by a motor, which is intended to move the frame the shaft is fixed to. I realize the applied torque is going to create support reactions, but I can't quite figure out how to calculate the needed material strength so that the frame won't shear.

All helps greatly appreciated.

Edit: I should probably add that there's a load attached to the frame in the z direction relative to the bottom right picture.
 
Engineering news on Phys.org
Is this a homework problem?
 
Chestermiller said:
Is this a homework problem?

No, it's for a project.
 
The torque induced shear stress at each plate connection should be 1/2 of the shear stress from an applied torque calculated for a shaft of your dimensions using standard textbook/online available equations.
 

Thread 'Bubble formation in 4 mm gap vessel'

How did you find PF?: Via Google search Hi, I have a vessel I 3D printed to investigate single bubble rise. The vessel has a 4 mm gap separated by acrylic panels. This is essentially my viewing chamber where I can record the bubble motion. The vessel is open to atmosphere. The bubble generation mechanism is composed of a syringe pump and glass capillary tube (Internal Diameter of 0.45 mm). I connect a 1/4” air line hose from the syringe to the capillary The bubble is formed at the tip...
View full post »
Thread 'Physics of Stretch: What pressure does a band apply on a cylinder?'

Thread 'Physics of Stretch: What pressure does a band apply on a cylinder?'

Scenario 1 (figure 1) A continuous loop of elastic material is stretched around two metal bars. The top bar is attached to a load cell that reads force. The lower bar can be moved downwards to stretch the elastic material. The lower bar is moved downwards until the two bars are 1190mm apart, stretching the elastic material. The bars are 5mm thick, so the total internal loop length is 1200mm (1190mm + 5mm + 5mm). At this level of stretch, the load cell reads 45N tensile force. Key numbers...
View full post »

Thread 'Find 3D Printer & Software Resources for Prototype Creation'

I'd like to create a thread with links to 3-D Printer resources, including printers and software package suggestions. My motivations are selfish, as I have a 3-D printed project that I'm working on, and I'd like to buy a simple printer and use low cost software to make the first prototype. There are some previous threads about 3-D printing like this: https://www.physicsforums.com/threads/are-3d-printers-easy-to-use-yet.917489/ but none that address the overall topic (unless I've missed...
View full post »

Similar threads

Why does shear force direction change in the middle of a beam?
Replies
4
Views
4K
Mechanics of Materials — Torsional Stress on a Spinning Shaft
Replies
5
Views
3K
Bending moment in an axis doesn´t match
Replies
1
Views
2K
Statically indeterminate tube in Torsion
Replies
2
Views
1K
How to analyse a rigid frame on wheels?
Replies
6
Views
4K
What is the proper interference fit for a sprague bearing in this system?
Replies
12
Views
2K
Tapered vs. Straight Shaft Pulley I/F
Replies
12
Views
7K
Double shear pin for the snow blower
Replies
3
Views
2K
Calculating Maximum Force for C1018 Steel Shaft
Replies
9
Views
3K
Linear reaction force on motors?
Replies
8
Views
3K

Hot Threads

Recent Insights

Back
Top