Stud shear strength

[element94]

Hello,

I'm looking to solve an internal shear strength problem. I have 1/4-20 all thread stud inserted into a cast aluminum part. I can calculate the shear strength of the aluminum. What I need is a website, book, anything that I can give to my boss that can explain the facts on course thread fastener failures.

Anybody have any ideas????

 

[CoryPad]

Good technical references:

faq725-600

Thread stripping info:

http://www.hexagon.de/dose/dose-1e.pdf

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[desertfox]

Hi element

Have a look at this site:-

http://www.roymech.co.uk/Useful_Tables/Screws/Thread_Calcs.html

regards

desertfox

 

[element94]

Thank you. Next, is there any reference, test..etc.. that will show performance of stud materials threaded into different female materials?

Thanks again.

 

[dimjim]

Check out Machineries Handbook for section
"Bolts and Nuts". Material Strength is
valid for any material. You have to evaluate
internal threads as well as external threads.
They list length of engagement formulas and
I think that is what you want.
HDS Handbook for Threads is a good reference too.

 

[CoryPad]

VDI 2230 and its references provide equations, tables, and test results.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[Tmoose]

If you have more than 2 diameters of good thread engagment the fastener will likely fail first under tension loading.
1/4-20 is about the weakest thread , size-for-size, since the threads are relatively deep.

Be sure to check some of the posts on proper torque to reduce fatigue and loosening concerns