Helicopter rotor blade stress calculations

[Aero_Marty]

Heyhey,

I am currently doing my final year masters project which involves testing rotor blades. I am performing a stress analysis of the blades. I will be using FEA software, but I also need to do some hand calculations. I have been looking for formulas for a while now, but I am unsure which to use and how exactly I should model it.

I was thinking I could model it as a simple cantilever, but obviously this wouldn't account for the rotation. Could anyone please help me? It would be much appreciated.

Regards


Marty

 

[FredGarvin]

If you make the assumption that you are staying in the linear realm, you can use superposition.

EDIT: WOO HOO! Number 5000!

 

[Brian_C]

Chapter 9 of Johnson's book "Helicopter Theory" covers the dynamics of rotor blades and the dynamic loads that exist in a rotor blade. Stress calculations get more complicated if you're using a laminated composite, in which case you may need to read up on lamination theory.

 

[Aero_Marty]

Thanks for your help, I'll have a look into that