Bolted Joint: Purpose of Sleeve and Spacer Usage

[struclearner]

Spacer in a bolted joint is used to increase the distance between clamped, it increase the Bolt length, resulting in decrease in bolt stiffness and this makes the proportion of bolt and members stiffness better.
Are there any benefits of using the spacer in a bolted joint?
Bolted joint with longer bolts may see the vibration bending of the bolt, so a sleeve is used, for this purpose, the clearance between bolt shank and sleeve should be minimum.
What are the other purposes/benefits of using a sleeve inside the holes of a bolted joint?
Thanks for your comments, sharing the knowledge and clarification, if my understanding of the use of sleeve/spacer in a bolted joint lacks some fundamentals.

 

[SWComposites]

Both sound bad. Where are you seeing these used?

 

[HTURKAK]

The use of long bolts provide a large volume of material,it is necessary in order to reduce the impact loading stresses and to get uniformly stressed in tension in operation.

There is tool GOOGLE ..Just write pneumatic cylinder and seacrh the web, one of the pictures below,

I could not see the problem ( using a sleeve inside the holes of a bolted joint) will you explain with a sketch?

 

[hydtools]

Using a sleeve could prevent a clamp load allowing parts to move relative to each other.

Ted

 

[r13]

Both questions are application dependent. You shall bring up specific cases for meaningful discussion.

 

[racookpe1978]

struclearner (Structural)(OP)

You have generated 5 separate question since Sept 17 in this single forum, none well phrased and none directed towards any single physical connection problem.
All five are asking ADVANCED BUT UNCLEAR questions around bolt theory and bolt failure and "how to interpret the theory of bolted connections from a textbook."

I congratulate yo on trying to learn, on reading and using the textbook on bolts and threaded stress, but I do need to ask: What exactly is the problem you are trying to solve with these repeated questions on how a theoretical bolts fails under theoretical - but never specified actual loads?

 

[drawoh]

struclearner,

I have called up metal spacers in composite flange because I wanted to torque the clamping screws down as hard as possible.

--
JHG