Stress Hand Calc Help! 1

[legersalazar]

Hello my fellow engineers,

I need to know if there is a quick and dirty way to determine the minimum thickness shown on the attached sketch.

Is there a quick way to do this by hand?

I'd appreciate your help.

Thank you,

Stress Engineer Trainee

 

[ESPcomposites]

The answer is yes. Do you have access to Bruhn's book? Niu's book should have the answer as well. If not, then you should get it.

This portion of the lug is subject to shear-bearing tearout and hoop tension. If you size it for the shear-bearing mode, the hoop tension should not be critical.

Brian

http://www.espcomposites.com

 

[rb1957]

lug design ... see Bruhn (or Niu)

 

[KENAT]

If memory serves isn't that one pretty easy to approximate from first principles?

Posting guidelines faq731-376

http://eng-tips.com/market.cfm?

(probably not aimed specifically at you)
What is Engineering anyway: faq1088-1484​

 

[rb1957]

Bruhn's method uses a lot of look-up tables of factors that don't look particularly derivable (ie they look experimental).

@ the OP ... direction of loading is significant.
2) if you don't have Bruhn (or similar) you need it, particularly if you are a "trainee". if you have it, you should open it ... it's pretty easy to find the section on lug design.

 

[legersalazar]

Thank you guys.

Niu, chapter 9, section 9.8 (LUG ANALYSIS) = GOOD STUFF!

Bruhn, chapter D1

I guess I'm not using these handbooks enough