Question

Calculate the mass (in metric tons) of a blade made of Aluminum, MAlblade , setting the stress limit equal to fatigue limit of the material, σAl0=150MPa.

Answer 1

Answer:

first calculate this

A _0 ^flap =  81 *8π *σ_0^ flap *h _0^ flap *ρair *V  *r ^2 *L  ^3

σ_0^ flap=150*10^6

then calculate A _0 ^edge and σ_0^edge=150*10^6

then M=2*(A _0 ^flap+A _0 ^edge)*86*2700

 finally M/1000 we need in tons

Explanation:

Calculate each step separately and then put he numbers that u gain in M formula