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

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FredGarvin Recognitions: Science Advisor	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	Helicopter rotor blade stress calculations Thanks for your help, I'll have a look into that